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Optimizing high-coordination shell of Co-based single-atom catalysts for efficient ORR and zinc-air batteries 被引量:1
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作者 Yugang Qi Qing Liang +9 位作者 Kexin Song Xinyan Zhou Meiqi Liu Wenwen Li Fuxi Liu Zhou Jiang Xu Zou Zhongjun Chen Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第8期306-314,I0007,共10页
Atom-level modulation of the coordination environment for single-atom catalysts(SACs)is considered as an effective strategy for elevating the catalytic performance.For the MNxsite,breaking the symmetrical geometry and... Atom-level modulation of the coordination environment for single-atom catalysts(SACs)is considered as an effective strategy for elevating the catalytic performance.For the MNxsite,breaking the symmetrical geometry and charge distribution by introducing relatively weak electronegative atoms into the first/second shell is an efficient way,but it remains challenging for elucidating the underlying mechanism of interaction.Herein,a practical strategy was reported to rationally design single cobalt atoms coordinated with both phosphorus and nitrogen atoms in a hierarchically porous carbon derived from metal-organic frameworks.X-ray absorption spectrum reveals that atomically dispersed Co sites are coordinated with four N atoms in the first shell and varying numbers of P atoms in the second shell(denoted as Co-N/P-C).The prepared catalyst exhibits excellent oxygen reduction reaction(ORR)activity as well as zinc-air battery performance.The introduction of P atoms in the Co-SACs weakens the interaction between Co and N,significantly promoting the adsorption process of ^(*)OOH,resulting in the acceleration of reaction kinetics and reduction of thermodynamic barrier,responsible for the increased intrinsic activity.Our discovery provides insights into an ultimate design of single-atom catalysts with adjustable electrocatalytic activities for efficient electrochemical energy conversion. 展开更多
关键词 ELECTROCATALYTIC Oxygen reduction reaction Single atom catalyst Shell coordination optimization
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Atomic Dispersed Hetero‑Pairs for Enhanced Electrocatalytic CO_(2)Reduction
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作者 Zhaoyong Jin Meiqi Yang +13 位作者 Yilong Dong Xingcheng Ma Ying Wang Jiandong Wu Jinchang Fan Dewen Wang Rongshen Xi Xiao Zhao Tianyi Xu Jingxiang Zhao Lei Zhang David J.Singh weitao zheng Xiaoqiang Cui 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第1期55-67,共13页
Electrochemical carbon dioxide reduction reaction(CO_(2)RR)involves a variety of intermediates with highly correlated reaction and ad-desorption energies,hindering optimization of the catalytic activity.For example,in... Electrochemical carbon dioxide reduction reaction(CO_(2)RR)involves a variety of intermediates with highly correlated reaction and ad-desorption energies,hindering optimization of the catalytic activity.For example,increasing the binding of the*COOH to the active site will generally increase the*CO desorption energy.Breaking this relationship may be expected to dramatically improve the intrinsic activity of CO_(2)RR,but remains an unsolved challenge.Herein,we addressed this conundrum by constructing a unique atomic dispersed hetero-pair consisting of Mo-Fe di-atoms anchored on N-doped carbon carrier.This system shows an unprecedented CO_(2)RR intrinsic activity with TOF of 3336 h−1,high selectivity toward CO production,Faradaic efficiency of 95.96%at−0.60 V and excellent stability.Theoretical calculations show that the Mo-Fe diatomic sites increased the*COOH intermediate adsorption energy by bridging adsorption of*COOH intermediates.At the same time,d-d orbital coupling in the Mo-Fe di-atom results in electron delocalization and facilitates desorption of*CO intermediates.Thus,the undesirable correlation between these steps is broken.This work provides a promising approach,specifically the use of di-atoms,for breaking unfavorable relationships based on understanding of the catalytic mechanisms at the atomic scale. 展开更多
关键词 CO_(2)reduction reaction Atomic dispersed catalyst Hetero-diatomic pair Ad-desorption energy Linear scaling relation
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The design and engineering strategies of metal tellurides for advanced metal-ion batteries
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作者 Wenmiao Zhao Xiaoyuan Shi +3 位作者 Bo Liu Hiroshi Ueno Ting Deng weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第2期579-598,I0013,共21页
Owning various crystal structures and high theoretical capacity,metal tellurides are emerging as promising electrode materials for high-performance metal-ion batteries(MBs).Since metal telluride-based MBs are quite ne... Owning various crystal structures and high theoretical capacity,metal tellurides are emerging as promising electrode materials for high-performance metal-ion batteries(MBs).Since metal telluride-based MBs are quite new,fundamental issues raise regarding the energy storage mechanism and other aspects affecting electrochemical performance.Severe volume expansion,low intrinsic conductivity and slow ion diffusion kinetics jeopardize the performance of metal tellurides,so that rational design and engineering are crucial to circumvent these disadvantages.Herein,this review provides an in-depth discussion of recent investigations and progresses of metal tellurides,beginning with a critical discussion on the energy storage mechanisms of metal tellurides in various MBs.In the following,recent design and engineering strategies of metal tellurides,including morphology engineering,compositing,defect engineering and heterostructure construction,for high-performance MBs are summarized.The primary focus is to present a comprehensive understanding of the structural evolution based on the mechanism and corresponding effects of dimension control,composition,electron configuration and structural complexity on the electrochemical performance.In closing,outlooks and prospects for future development of metal tellurides are proposed.This work also highlights the promising directions of design and engineering strategies of metal tellurides with high performance and low cost. 展开更多
关键词 Metal tellurides Metal-ion battery Energy storage mechanism Material design and engineering
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Exploring the therapeutic potential of precision T-Cell Receptors (TCRs) in targeting KRAS G12D cancer through in vitro development
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作者 weitao zheng DONG JIANG +8 位作者 SONGEN CHEN MEILING WU BAOQI YAN JIAHUI ZHAI YUNQIANG SHI BIN XIE XINGWANG XIE KANGHONG HU WENXUE MA 《Oncology Research》 SCIE 2024年第12期1837-1850,共14页
Objectives:The Kirsten rat sarcoma virus(KRAS)G12D oncogenic mutation poses a significant challenge in treating solid tumors due to the lack of specific and effective therapeutic interventions.This study aims to explore... Objectives:The Kirsten rat sarcoma virus(KRAS)G12D oncogenic mutation poses a significant challenge in treating solid tumors due to the lack of specific and effective therapeutic interventions.This study aims to explore innovative approaches in T cell receptor(TCR)engineering and characterization to target the KRAS G12D7-16 mutation,providing potential strategies for overcoming this therapeutic challenge.Methods:In this innovative study,we engineered and characterized two T cell receptors(TCRs),KDA11-01 and KDA11-02 with high affinity for the KRAS G12D7-16 mutation.These TCRs were isolated from tumor-infiltrating lymphocytes(TILs)derived from tumor tissues of patients with the KRAS G12D mutation.We assessed their specificity and anti-tumor activity in vitro using various cancer cell lines.Results:KDA11-01 and KDA11-02 demonstrated exceptional specificity for the HLA-A*11:01-restricted KRAS G12D7-16 epitope,significantly inducing IFN-γrelease and eliminating tumor cells without cross-reactivity or alloreactivity.Conclusions:The successful development of KDA11-01 and KDA11-02 introduces a novel and precise TCR-based therapeutic strategy against KRAS G12D mutation,showing potential for significant advancements in cancer immunotherapy. 展开更多
关键词 T cell receptor(TCR) TCR therapy Tumor-infiltrating lymphocytes(TILs) Kirsten rat sarcoma virus(KRAS) G12D ALLOREACTIVITY
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Diffusionless-Like Transformation Unlocks Pseudocapacitance with Bulk Utilization: Reinventing Fe_(2)O_(3) in Alkaline Electrolyte 被引量:2
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作者 Taowen Dong Wencai Yi +10 位作者 Ting Deng Tingting Qin Xianyu Chu He Yang Lirong zheng Seung Jo Yoo Jin-Gyu Kim Zizhun Wang Yan Wang Wei Zhang weitao zheng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第1期145-154,共10页
Energy density can be substantially raised and even maximized if the bulk of an electrode material is fully utilized.Transition metal oxides based on conversion reaction mechanism are the imperative choice due to eith... Energy density can be substantially raised and even maximized if the bulk of an electrode material is fully utilized.Transition metal oxides based on conversion reaction mechanism are the imperative choice due to either constructing nanostructure or intercalation pseudocapacitance with their intrinsic limitations.However,the fully bulk utilization of transition metal oxides is hindered by the poor understanding of atomic-level conversion reaction mechanism,particularly it is largely missing at clarifying how the phase transformation(conversion reaction)determines the electrochemical performance such as power density and cyclic stability.Herein,α-Fe_(2)O_(3) is a case provided to claim how the diffusional and diffusionless transformation determine the electrochemical behaviors,as of its conversion reaction mechanism with fully bulk utilization in alkaline electrolyte.Specifically,the discharge productα-FeOOH diffusional from Fe(OH)2 is structurally identified as the atomic-level arch criminal for its cyclic stability deterioration,whereas the counterpartδ-FeOOH is theoretically diffusionless-like,unlocking the full potential of the pseudocapacitance with fully bulk utilization.Thus,such pseudocapacitance,in proof-of-concept and termed as conversion pseudocapacitance,is achieved via diffusionless-like transformation.This work not only provides an atomic-level perspective to reassess the potential electrochemical performance of the transition metal oxides electrode materials based on conversion reaction mechanism but also debuts a new paradigm for pseudocapacitance. 展开更多
关键词 bulk utilization conversion pseudocapacitance diffusionless transformation Fe_(2)O_(3) phase transformation
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Ultrathin origami accordion-like structure of vacancy-rich graphitized carbon nitride for enhancing CO_(2) photoreduction 被引量:1
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作者 Guangri Jia Zhongxu Wang +8 位作者 Ming Gong Ying Wang Lu Hua Li Yilong Dong Lulu Liu Lei Zhang Jingxiang Zhao weitao zheng Xiaoqiang Cui 《Carbon Energy》 SCIE CSCD 2023年第4期94-104,共11页
Retaining the ultrathin structure of two-dimensional materials is very important for stabilizing their catalytic performances.However,aggregation and restacking are unavoidable,to some extent,due to the van der Waals ... Retaining the ultrathin structure of two-dimensional materials is very important for stabilizing their catalytic performances.However,aggregation and restacking are unavoidable,to some extent,due to the van der Waals interlayer interaction of two-dimensional materials.Here,we address this challenge by preparing an origami accordion structure of ultrathin twodimensional graphitized carbon nitride(oa-C_(3)N_(4))with rich vacancies.This novel structured oa-C_(3)N_(4) shows exceptional photocatalytic activity for the CO_(2) reduction reaction,which is 8.1 times that of the pristine C_(3)N_(4).The unique structure not only prevents restacking but also increases light harvesting and the density of vacancy defects,which leads to modification of the electronic structure,regulation of the CO_(2) adsorption energy,and a decrease in the energy barrier of the carbon dioxide to carboxylic acid intermediate reaction.This study provides a new avenue for the development of stable highperformance two-dimensional catalytic materials. 展开更多
关键词 C_(3)N_(4) CO_(2)photoreduction molecular modification PHOTOCATALYSTS solar energy conversion two-dimensional materials
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MXene-Based Quantum Dots Optimize Hydrogen Production via Spontaneous Evolution of Cl-to O-Terminated Surface Groups 被引量:1
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作者 Yuhua Liu Xiaoyu Zhang +5 位作者 Wei Zhang Xin Ge Yan Wang Xu Zou Xinyan Zhou weitao zheng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第6期251-258,共8页
MXene quantum dots(MQDs)offer wide applications owing to the abundant surface chemistry,tunable energy-level structure,and unique properties.However,the application of MQDs in electrochemical energy conversion,includi... MXene quantum dots(MQDs)offer wide applications owing to the abundant surface chemistry,tunable energy-level structure,and unique properties.However,the application of MQDs in electrochemical energy conversion,including hydrogen evolution reaction(HER),remains to be realized,as it remains a challenge to precisely control the types of surface groups and tune the structure of energy levels in MQDs,owing to the high surface energy-induced strong agglomeration in post-processing.Consequently,the determination of the exact catalytically active sites and processes involved in such an electrocatalysis is challenging because of the complexity of the synthetic process and reaction conditions.Herein,we demonstrated the spontaneous evolution of the surface groups of the Ti_(2)CT_(x)MQDs(x:the content of O atom),i.e.,replacement of the-Cl functional groups by O-terminated ones during the cathode reaction.This process resulted in a low Gibbs free energy(0.26 eV)in HER.Our steady Ti_(2)CO_(x)/Cu_(2)O/Cu foam systems exhibited a low overpotential of 175 mV at 10 mA cm^(-2)in 1 M aq.KOH,and excellent operational stability over 165 h at a constant current density of-10 mA cm^(-2). 展开更多
关键词 HF free hydrogen evolution MXene quantum dots surface group
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Enhancing water-dissociation kinetics and optimizing intermediates adsorption free energy of cobalt phosphide via high-valence Zr incorporating for alkaline water electrolysis 被引量:1
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作者 Huafeng Fan Dongxu Jiao +6 位作者 Jinchang Fan Dewen Wang Bilal Zaman Wei Zhang Lei Zhang weitao zheng Xiaoqiang Cui 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第8期119-127,I0005,共10页
Developing high-efficiency electrocatalysts for hydrogen evolution reaction(HER) and oxygen evolution reaction(OER) is required to enhance the sluggish kinetics of water dissociation and optimize the adsorption free e... Developing high-efficiency electrocatalysts for hydrogen evolution reaction(HER) and oxygen evolution reaction(OER) is required to enhance the sluggish kinetics of water dissociation and optimize the adsorption free energy of reaction intermediates.Herein,we tackle this challenge by incorporating high-valence Zr into CoP(ZrxCo_(1-x)P),which significantly accelerates the elementary steps of water electrolysis.Theoretical calculations indicate that the appropriate Zr incorporation effectively expedites the sluggish H2O dissociation kinetics and optimizes the adsorption energy of reaction intermediates for boosting the alkaline water electrolysis.These are confirmed by the experimental results of Zr_(0.06)Co_(0.94)P catalyst that delivers exceptional electrochemical activity.The overpotentials at the current density of 10 mA cm^(-2)(j10) are only 62(HER) and 240 mV(OER) in alkaline media.Furthermore,the Zr_(0.06)Co_(0.94)P/CC‖Zr_(0.06)Co_(0.94)P/CC system exhibits superior overall water splitting activity(1.53 V/j10),surpassing most of the reported bifunctional catalysts.This high-valence Zr incorporation and material design methods explore new avenues for realizing high-performance non-noble metal electrocatalysts. 展开更多
关键词 DFT simulation Water electrolysis Cobalt phosphide High-valence Zr
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Switching Optimally Balanced Fe-N Interaction Enables Extremely Stable Energy Storage 被引量:1
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作者 Zhenzhen Zhao Wei Zhang +8 位作者 Miao Liu Dong Wang Xiyang Wang Lirong zheng Xu Zou Zizhun Wang Dabing Li Keke Huang weitao zheng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第2期275-283,共9页
The interaction between electrode materials and charge carriers is one of the central issues dominating underlying energy storage mechanisms.To address the notoriously significant volume changes accompanying intercala... The interaction between electrode materials and charge carriers is one of the central issues dominating underlying energy storage mechanisms.To address the notoriously significant volume changes accompanying intercalation or formation of alloy/compounds,we aim to introduce and utilize a weak,reversible Fe-N interaction during the(de)intercalation of ammonium ions(NH_(4)^(+))within iron(Ⅲ)hexacyanoferrate(FeHCF),inspired by manipulating the electrostatic adsorption between N and Fe in the early stages of ammonia synthesis(Bosch-Harber Process,Chemical Engineering)and steel nitriding processes(Metal Industry).Such strategy of switching well-balanced Fe-N interaction is confirmed in between the nitrogen of ammonium ions and highspin Fe in FeHCF,as observed by using X-ray absorption spectroscopy.The resulting material provided an extremely stable energy storage(58 mAh g^(-1) after 10000 cycles at current density of 1 A g^(-1))as well as high-rate performance(23.6 mAh g^(-1) at current density of 10 A g^(-1)). 展开更多
关键词 ammonium ion battery Iron(Ⅲ)hexacyanoferrate reversible Fe-N interaction stability
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Structure-catalytic functionality of size-facet-performance in pentlandite nanoparticles
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作者 Chenxu Zhang Chao Jiang +8 位作者 Qi Tang Zeshuo Meng Yaxin Li Yanan Wang Yanan Cui Wei Shi Shansheng Yu Hongwei Tian weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第3期438-446,I0012,共10页
As one of the pentlandites,Fe5Ni4S8(FNS) based materials have attracted increasing attention due to their excellent catalytic properties and promising applicability.The control over the catalyst surface structure ofte... As one of the pentlandites,Fe5Ni4S8(FNS) based materials have attracted increasing attention due to their excellent catalytic properties and promising applicability.The control over the catalyst surface structure often benefits its heterogeneous catalytic activity.However,this has not been investigated for FNS materials at the nanoscale regarding the catalytic activity related to high-index facets.Herein,FNS nanoparticles(FNSNPs) with enclosed continuous tunable high-index facets were prepared and studied to clarify the relationship between the structure and catalytic functionality.The results suggested strong dependence between exposed facets of FNSNPs and their sizes.The decline in the average size to5.8 nm led to enclosing by high-index facets(422) and(511) to yield optimal electrocatalytic activities toward the hydrogen evolution reaction.The catalytic activity of FNSNPs was closely related to the surface energy of the main exposed facets.These findings clarified the relationship between high-index-facet and high-surface-energy FNSNPs,as promising approaches in crystal surface control engineering. 展开更多
关键词 Structure-activity relationship Size-facet-performance Active facet PENTLANDITE NANOPARTICLES
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2D titanium carbide(MXene) electrodes with lower-F surface for high performance lithium-ion batteries 被引量:11
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作者 Ming Lu Haojie Li +9 位作者 Wenjuan Han Junnan Chen Wen Shi Jiaheng Wang Xiang-Min Meng Jingang Qi Haibo Li Bingsen Zhang Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第4期148-153,共6页
MXene has shown distinctive advantages as anode materials of lithium-ion batteries. However, local surface chemistry, which was confirmed that can block ion transfer and limit redox reaction, has a significant effect ... MXene has shown distinctive advantages as anode materials of lithium-ion batteries. However, local surface chemistry, which was confirmed that can block ion transfer and limit redox reaction, has a significant effect on electrochemical performance. Herein, annealing MXene under hydrogen was employed for removing-F and turning-OH to-O terminations. We demonstrate that it improves the kinetics of Li-ion transport between the electrolyte and electrode. As a result, a lower interfacial charge transfer impedance was obtained. The electrochemical measurement exhibited that a nearly 2-fold increase of specific capacity was achieved for the annealed MXene. 展开更多
关键词 Ti3C2 MXene LI-ION Hydrogen -F CONTENT
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Revealing the Intrinsic Peroxidase-Like Catalytic Mechanism of Heterogeneous Single-Atom Co-MoS2 被引量:8
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作者 Ying Wang Kun Qi +9 位作者 Shansheng Yu Guangri Jia Zhiliang Cheng Lirong zheng Qiong Wu Qiaoliang Bao Qingqing Wang Jingxiang Zhao Xiaoqiang Cui weitao zheng 《Nano-Micro Letters》 SCIE EI CAS CSCD 2019年第4期778-790,共13页
The single-atom nanozyme is a new concept and has tremendous prospects to become a next-generation nanozyme.However,few studies have been carried out to elucidate the intrinsic mechanisms for both the single atoms and... The single-atom nanozyme is a new concept and has tremendous prospects to become a next-generation nanozyme.However,few studies have been carried out to elucidate the intrinsic mechanisms for both the single atoms and the supports in single-atom nanozymes.Herein,the heterogeneous single-atom Co-MoS2(SA Co-MoS2)is demonstrated to have excellent potential as a high-performance peroxidase mimic.Because of the well-defined structure of SA Co-MoS2,its peroxidase-like mechanism is extensively interpreted through experimental and theoretical studies.Due to the different adsorption energies of substrates on different parts of SA Co-MoS2 in the peroxidase-like reaction,SA Co favors electron transfer mechanisms,while MoS2 relies on Fenton-like reactions.The different catalytic pathways provide an intrinsic understanding of the remarkable performance of SA Co-MoS2.The present study not only develops a new kind of single-atom catalyst(SAC)as an elegant platform for understanding the enzyme-like activities of heterogeneous nanomaterials but also facilitates the novel application of SACs in biocatalysis. 展开更多
关键词 BIOCATALYSIS Nanozymes PEROXIDASE MIMIC Reaction mechanisms SINGLE-ATOM catalysts
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Integrated Co3O4/carbon fiber paper for high-performance anode of dual-ion battery 被引量:4
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作者 Lu Sui Xiaoyuan Shi +5 位作者 Ting Deng He Yang Hongyan Liu Hong Chen Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第10期7-12,共6页
In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expa... In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expansion and exfoliation always occur for electrode materials. Herein, an integrated electrode Co3O4/carbon fiber paper (CFP) is prepared as the anode of DIB. As the Co3O4 nanosheets grow on CFP substrate vertically, it promotes the immersion of electrolyte and shortens the pathway for ionic transport. Besides, the strong interaction between Co3O4 and CFP substrate reduces the possibility of sheet exfoliation. An integrated-electrode-based DIB is therefore packaged using Co3O4/CFP as anode and graphite as cathode. As a result, a high energy density of 72 Wh/kg is achieved at a power density of 150 W/kg. The design of integrated electrode provides a new route for the development of high-performance DIBs. 展开更多
关键词 INTEGRATED electrode Dual-ion batteries CO3O4 ANODE Carbon fiber paper
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Optimizing the micropore-to-mesopore ratio of carbon-fiber-cloth creates record-high specific capacitance 被引量:5
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作者 Ying zheng Ting Deng +1 位作者 Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第8期210-216,I0008,共8页
The application of commercial carbon fiber cloth(CFC) in energy storage equipment is limited by its low specific capacitance and energy density. By a simple one-step activation treatment, the specific surface area of ... The application of commercial carbon fiber cloth(CFC) in energy storage equipment is limited by its low specific capacitance and energy density. By a simple one-step activation treatment, the specific surface area of CFCs with porous structure can be increased considerably from 3.9 up to 875 m^2/g and the electrochemical properties of CFCs can be improved by three orders of magnitude(1324 mF/cm^2). Moreover,the hydrophobicity of CFCs can be transformed into superhydrophilicity. However, the electrochemical performance of CFCs does not show a positive correlation with specific surface area but have a strong relationship with the hierarchical pore distribution forged by the annealing treatment. Only moderate micropore and mesoporous ratio enables optimizing the electrochemical performance of CFCs. 展开更多
关键词 Pore distribution Hierarchical pores integration SUPERCAPACITORS Carbon fiber cloth Electrochemical performance
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Unlock the potential of Li4Ti5O(12) for high-voltage/long-cycling-life and high-safety batteries: Dual-ion architecture superior to lithium-ion storage 被引量:4
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作者 Xiaoyuan Shi Shansheng Yu +2 位作者 Ting Deng Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第5期13-18,共6页
Li4Ti5O(12)(LTO)has drawn great attention due to its safety and stability in lithium-ion batteries(LIBs).However,high potential plateau at 1.5 V vs.Li reduces the cell voltage,leading to a limited use of LTO.Dual-ion ... Li4Ti5O(12)(LTO)has drawn great attention due to its safety and stability in lithium-ion batteries(LIBs).However,high potential plateau at 1.5 V vs.Li reduces the cell voltage,leading to a limited use of LTO.Dual-ion batteries(DIBs)can achieve high working voltage due to high intercalation potential of cathode.Herein,we propose a DIB configuration in which LTO is used as anode and the working voltage was 3.5 V.This DIB achieves a maximum specific energy of 140 Wh/kg at a specific power of 35 W/kg,and the specific power of 2933 W/kg can be obtained with a remaining specific energy of 11 Wh/kg.Traditional LIB material shows greatly improved properties in the DIB configuration.Thus,reversing its disadvantage leads to upgraded performance of batteries.Our configuration has also widened the horizon of materials for DIBs. 展开更多
关键词 Li4Ti5O12 SPECIFIC energy SPECIFIC power Dual-ion BATTERIES LITHIUM-ION BATTERIES
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A semiconductor-electrochemistry model for design of high-rate Li ion battery 被引量:4
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作者 Wei Zhang Dong Wang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第2期100-106,共7页
For designing batteries with high-rate and long-life, electronic/ionic transport and reaction must be unified for metal oxide electrodes. However, it remains challenging for effectively integrating the whole substrate... For designing batteries with high-rate and long-life, electronic/ionic transport and reaction must be unified for metal oxide electrodes. However, it remains challenging for effectively integrating the whole substrate/active materials/electrolyte interfaces. Herein by taking Li ion battery as example, we propose a semiconductor-electrochemistry model by which a general but novel insight has been gained into interfacial effect in batteries. Different from those traditional viewpoints, this derived model lies across from physics to electrochemistry. A reaction driving force can be expressed in terms of Fermi energy change,based on the tradeoff between electronic and ionic concentration at the reaction interfacial region. Therefore, at thermodynamic-controlled interface I of substrate/electrode, increasing contact areas can afford higher activity for active materials. Whereas at kinetically-governed interface II of electrode/electrolyte or inside active materials, it is crucial to guarantee high-reaction Li ionic concentration, with which some sufficient reaction degrees can reach. 展开更多
关键词 SEMICONDUCTOR ELECTROCHEMISTRY Interface Surface FERMI energy SEI
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Efficient ORR catalysts for zinc-air battery: Biomass-derived ultra-stable Co nanoparticles wrapped with graphitic layers via optimizing electron transfer 被引量:5
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作者 Yu Feng Kexin Song +12 位作者 Wei Zhang Xinyan Zhou Seung Jo Yoo Jin-Gyu Kim Sifan Qiao Yugang Qi Xu Zou Zhongjun Chen Tingting Qin Nailin Yue Zizhun Wang Dabing Li weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第7期211-218,I0006,共9页
The poor stability of non-noble metal catalysts in oxygen reduction reaction(ORR) is a main bottleneck that limits their big-scale application in metal-air batteries. Herein, we construct a chainmail catalyst(Co-NC-AD... The poor stability of non-noble metal catalysts in oxygen reduction reaction(ORR) is a main bottleneck that limits their big-scale application in metal-air batteries. Herein, we construct a chainmail catalyst(Co-NC-AD) with outstanding stability, via the competitive complexation and post absorption strategy,consisting of highly graphitic layers wrapped uniform-size Co nanoparticles(Co-NPs). Experiments combined with density functional theory(DFT) calculations jointly confirmed that the electron transfer occurred from the inner Co-NPs to the external graphitic layers. It facilitated the adsorption process of oxygen molecules and the hybridization of the O-2 p and C-1 p orbitals, which accelerated the ORR reaction kinetics. Consequently, our prepared Co-NC-AD shows excellent ORR activity, offered with a more positive initial potential(E_(onset)= 0.95 V) and half-wave potential(E_(1/2)= 0.86 V). The remarkable stability and resistance of methanol poisoning are merited from the protection effect of stable graphitic layers. In addition, the high electrochemical performance of Co-NC-AD-based zinc-air battery demonstrates their potential for practical applications. Therefore, our work provides new ideas for the design of nanoconfined catalysts with high stability and activity. 展开更多
关键词 Chainmail catalyst Graphitic layers Co nanoparticles Oxygen reduction reaction
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Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis 被引量:4
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作者 Yuhua Liu Wei Zhang weitao zheng 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第10期36-82,共47页
It is well known that two-dimensional(2D)MXene-derived quan-tum dots(MQDs)inherit the excellent physicochemical properties of the parental MXenes,as a Chinese proverb says,“Indigo blue is extracted from the indigo pl... It is well known that two-dimensional(2D)MXene-derived quan-tum dots(MQDs)inherit the excellent physicochemical properties of the parental MXenes,as a Chinese proverb says,“Indigo blue is extracted from the indigo plant,but is bluer than the plant it comes from.”Therefore,0D QDs harvest larger surface-to-volume ratio,outstanding optical properties,and vigorous quantum confinement effect.Currently,MQDs trigger enormous research enthusiasm as an emerging star of functional materials applied to physics,chemistry,biology,energy conversion,and storage.Since the surface properties of small-sized MQDs include the type of surface functional groups,the functionalized surface directly determines their performance.As the Nobel Laureate Wolfgang Pauli says,“God made the bulk,but the surface was invented by the devil,”and it is just on the basis of the abundant surface functional groups,there is lots of space to be thereof excavated from MQDs.We are witnessing such excellence and even more promising to be expected.Nowadays,MQDs have been widely applied to catalysis,whereas the related reviews are rarely reported.Herein,we provide a state-of-the-art overview of MQDs in catalysis over the past five years,ranging from the origin and development of MQDs,synthetic routes of MQDs,and functionalized MQDs to advanced characterization techniques.To explore the diversity of catalytic application and perspectives of MQDs,our review will stimulate more efforts toward the synthesis of optimal MQDs and thereof designing high-performance MQDs-based catalysts. 展开更多
关键词 MXene Quantum dots CATALYSIS Surface groups STRUCTURE
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MOFs fertilized transition-metallic single-atom electrocatalysts for highly-efficient oxygen reduction: Spreading the synthesis strategies and advanced identification 被引量:3
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作者 Kexin Song Yu Feng +1 位作者 Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第4期391-422,共32页
Metal-organic frameworks(MOFs) have been widely used in oxygen reduction reaction(ORR) of fuel cells and metal-air batteries, attributed to their unique structures and compositions. Recently, the preparation of transi... Metal-organic frameworks(MOFs) have been widely used in oxygen reduction reaction(ORR) of fuel cells and metal-air batteries, attributed to their unique structures and compositions. Recently, the preparation of transition-metallic single-atom electrocatalysts(TM-SACs) using MOFs as precursors or templates has made great progress. Herein, the development history of SACs prepared based on MOFs and their characterization are overviewed firstly, and then several strategies are summarized for preparing TM-SACs using MOFs and further modification. Finally, the challenges and opportunities confronted by TM-SACs are fully discussed. Consequently, our work can guide the realization of TM-SACs abundant with high activity, high loading and high stability. 展开更多
关键词 Transition-metallic single-atom electrocatalysts(TM-SACs) Oxygen reduction reaction(ORR) Metal-organic frameworks(MOFs) Electron microscopy Spectroscopy
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Reinventing the mechanism of high-performance Bi anode in aqueous K^+ rechargeable batteries 被引量:3
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作者 Tingting Qin Xuefeng Chu +10 位作者 Ting Deng Boran Wang Xiaoyu Zhang Taowen Dong zhengming Li Xiaofeng Fan Xin Ge Zizhun Wang Peng Wang Wei Zhang weitao zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第9期21-28,I0002,共9页
Increasing attention has been paid to rechargeable aqueous batteries due to their high safety and low cost.However,they remain in their infancy because of the limited choice of available anode materials with high spec... Increasing attention has been paid to rechargeable aqueous batteries due to their high safety and low cost.However,they remain in their infancy because of the limited choice of available anode materials with high specific capacity and satisfying cycling performance.Bi metal with layered structure can act as an ideal anode material with high capacity;however,the energy storage mechanism has not well elucidated.Herein,we demonstrate that Bi metal enables affording ultra-high specific capacity(254.3 mAh g^-1),superior rate capability and a capacity retention of 88.8%after 1600 cycles.Different from the previously-reported redox reaction mechanisms of Bi electrode,efficient(de)alloying of K+is responsible for its excellent performance.An excellent aqueous Bi battery is fabricated by matching Bi anode with Co(OH)2 cathode in KOH(1 M)electrolyte.Its outstanding performance is quite adequate and competitive for electrochemical energy storage devices. 展开更多
关键词 Aqueous rechargeable batteries Bi anode K^+ ALLOYING MECHANISM
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