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Cation-doped LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode with high rate performance
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作者 Long Zhang Dongsheng Yang +7 位作者 Lilei Miao Chunmeng Zhang Jiexiang Li Jiawei Wen Chunxia Wang Tiantian Cao Guoyong Huang shengming xu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第6期139-148,共10页
The nickel-rich layered cathode material LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)has high energy density,lower cost and is a promising cathode material currently under development.However,its electrochemical and struct... The nickel-rich layered cathode material LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)has high energy density,lower cost and is a promising cathode material currently under development.However,its electrochemical and structural stability is poor during cycling.Among the many modification methods,cation doping has been consistently proven to be an effective strategy for enhancing electrochemical performance.Herein,the NCM811 cathode material was modified by solid-phase reactions with Mg and Al doped.In addition,the corresponding mechanism of NCM811 cathode material-doped modification is explored by density functional theory(DFT)calculations,and we have extended this approach to other ternary cathode materials with different ratios and obtained universal laws.Combined with DFT calculations,the results show that Mg2+occupies the Li+site and reduces the degree of Li^(+)/Ni^(2+) mixture;Al^(3+) acts as a structural support during charging and discharging to prevent structural collapse.The electrochemical properties were tested by an electrochemical workstation and the LAND system,and the results showed that the capacity retention rate increased to varying degrees from 63.66%to 69.87%and 89.05%for NCM811-Mg and NCM811-Al at room temperature after 300 cycles,respectively.This study provides a theoretical basis and design strategy for commercializing cationic-doped modification of nickel-rich cathode materials. 展开更多
关键词 Li-ion batteries Cathode materials DOPED Electrochemical properties DFT calculation
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Study on metal recovery process and kinetics of oxidative leaching from spent LiFePO_(4)Li-batteries
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作者 Xiaoming Zhang Wen Xie +5 位作者 Xiaolei Zhou Wenjie Zhang Jiawei Wen Xin Wang Guoyong Huang shengming xu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第4期94-102,共9页
A green environmental protection and enhanced leaching process was proposed to recover all elements from spent lithium iron phosphate(LiFePO_(4)) lithium batteries.In order to reduce the influence of Al impurity in th... A green environmental protection and enhanced leaching process was proposed to recover all elements from spent lithium iron phosphate(LiFePO_(4)) lithium batteries.In order to reduce the influence of Al impurity in the recovery process,NaOH was used to remove impurity.After impurity removal,the spent LiFePO_(4) cathode material was used as raw material under the H_(2)SO_(4) system,and the pressure oxidation leaching process was adopted to achieve the preferential leaching of lithium.The E-pH diagram of the Fe-P-Al-H_(2)O system can determine the stable region of each element in the recovery process of spent LiFePO_(4)Li-batteries.Under the optimal conditions(500 r·min^(-1),15 h,363.15 K,0.4 MPa,the liquid-solid ratio was 4:1 ml·g^(-1)and the acid-material ratio was 0.29),the leaching rate of Li was 99.24%,Fe,Al,and Ti were 0.10%,2.07%,and 0.03%,respectively.The Fe and P were precipitated and recovered as FePO_(4)·2H_(2)O.The kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO_(4) materials depends on the surface chemical reaction.Through the life cycle assessment(LCA)of the spent LiFePO_(4) whole recovery process,eight midpoint impact categories were selected to assess the impact of recovery process.The results can provide basic environmental information on production process for recycling industry. 展开更多
关键词 Spent LiFePO_(4)Li-batteries Oxidative leaching Kinetic study Life cycle assessment
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Grain size regulation for balancing cycle performance and rate capability of LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2) single crystal nickel-rich cathode materials 被引量:8
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作者 Jiapei Wang Xibin Lu +3 位作者 Yingchao Zhang Jiahui Zhou Jiexi Wang shengming xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第2期681-687,共7页
It is challenging to balance the cyclability and rate capability of single crystal nickel-rich cathode materials(Ni>0.8).Multicomponent oxides by spray pyrolysis shows potential as highly-reactive precursors to syn... It is challenging to balance the cyclability and rate capability of single crystal nickel-rich cathode materials(Ni>0.8).Multicomponent oxides by spray pyrolysis shows potential as highly-reactive precursors to synthesize single crystal nickel-rich cathode at lower temperature,yet Ni^(2+)will severely inhibit particle growth when Ni content exceeds 0.9.Herein,lithium nitrate(LiNO_(3))with low melting point and strong oxidation is introduced as collaborate lithium salts for fabrication of well-dispersed submicron and micron single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2)(NCM90)cathode without extra unit operation.By changing amount of LiNO_(3),particle size regulation is realized and cation disorder can be diminished.The as-prepared material with optimal content of 4 wt%LiNO_(3)(NCM90-4 LN)displays the most appropriate particle size(1μm)with approximately stoichiometric structure,and presents better kinetics characterization of lithium-ion diffusion(15%higher than NCM90)and good electrochemical performance with specific discharge capacity of 220.6 and 173.8 mAh g^(-1) at 0.1 C and 10 C at room temperature,respectively.This work broadens the conventional research methodology of size regulation for single crystal Ni-rich cathode materials and is indispensable for the development of designing principal of nickel-rich cathode materials for lithium-ion batteries. 展开更多
关键词 Single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2) Spray pyrolysis Lithium nitrate Lithium-ion batteries
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AC Impedance Studies of SnO_2:Sc_2O_3 Based CO Sensor
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作者 Gang xu shengming xu +3 位作者 Lili Wei Fang Wu Songzhe Chen Linyan Li 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第A03期203-205,共3页
关键词 AC impedance spectroscopy SNO2 Sc2O3 CO gas sensor
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Extractant(2,3-dimethylbutyl)(2,4,40-trimethylpentyl) phosphinic acid(INET-3) impregnated onto XAD-16 and its extraction and separation performance for heavy rare earths from chloride media 被引量:5
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作者 Junlian Wang Meiying Xie +2 位作者 Juanjuan Ma Huajun Wang shengming xu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第12期1239-1247,共9页
(2,3-Dimethylbutyl)(2,4,40-trimethylpentyl)phosphinic acid(INET-3) was impregnated onto dry macroporous resins XAD-16 and pretreated XAD-16 with ethyl alcohol and HCl(Pre-XAD-16) to prepare the solvent impregn... (2,3-Dimethylbutyl)(2,4,40-trimethylpentyl)phosphinic acid(INET-3) was impregnated onto dry macroporous resins XAD-16 and pretreated XAD-16 with ethyl alcohol and HCl(Pre-XAD-16) to prepare the solvent impregnated resins SIRs-INET-3/XAD-16 and SIRs-INET-3/Pre-XAD-16. The molecular weight distribution of the low molecular weight(LMW) polymers washed off by ethyl alcohol during XAD-16 pretreatment was determined by gel permeation chromatography(GPC). The macroporous resins(XAD-16 & Pre-XAD-16), the corresponding solvent impregnated resins(SIRs-INET-3/XAD-16 &SIRs-INET-3/Pre-XAD-16) and the PVA coated SIRs-INET-3/Pre-XAD-16 with boric acid as cross-linking agent were characterized by FT-IR, SEM-EDS and TGA. The effects of XAD-16 pretreatment and PVA coating technology on RE(III) adsorption equilibrium time, INET-3 losses during extraction and adsorption capacity were investigated. The adsorption kinetics, selectivity and stripping behaviors of SIRs-INET-3/XAD-16 were further studied. The washed off LMW polymers had the Mn of 36,656, Mw of 40,310 and polydispersity coefficient of 1.10. The SIRs-INET-3/XAD-16 had shorter equilibrium time,less INET-3 loss and more Tm(III) adsorption capacity than the SIRs-INET-3/Pre-XAD-16. The PVA coated SIRs-INET-3/Pre-XAD-16 had less INET-3 loss and more Tm(III) adsorption capacity but longer equilibrium time than the uncoated SIRs-INET-3/Pre-XAD-16. The adsorption of RE(III) on the SIRsINET-3/XAD-16 followed the pseudo-second-order kinetic model. The Tm(III) accumulative adsorption amounts onto SIRs-INET-3/XAD-16 after eight extraction stages was 23.6 mg/g. The separation factors of adjacent heavy RE(III) β(Er/Ho), β(Tm/Er), β(Yb/Tm) and β(Lu/Yb) values were 1.76, 2.59, 2.56 and 1.19,respectively. The adsorbed Lu(III) onto the SIRs-INET-3/XAD-16 can be stripped completely by 1.0 mol/L H2SO4. 展开更多
关键词 (2 3-Dimethylbutyl)(2 4 4'-trimethylpentyl) phosphinic acid Solvent impregnated resins Adsorption Heavy rare earths
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De novo synthesis of bifunctional conjugated microporous polymers for synergistic coordination mediated uranium entrapment 被引量:3
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作者 Boxuan Yu Lei Zhang +6 位作者 Gang Ye Qingzhi Liu Jiongli Li xudong Wang Jing Chen shengming xu Shengqian Ma 《Nano Research》 SCIE EI CAS CSCD 2021年第3期788-796,共9页
This work reports a de novo synthesis of novel bifunctional conjugated microporous polymers(CMPs)exhibiting a synergistic-effect involved coordination behavior to uranium.It is highlighted that the synthetic strategy ... This work reports a de novo synthesis of novel bifunctional conjugated microporous polymers(CMPs)exhibiting a synergistic-effect involved coordination behavior to uranium.It is highlighted that the synthetic strategy enables the engineering of the coordination environment within amidoxime functionalized CMP frameworks by specifically introducing ortho-substituted amino functionalities,enhancing the affinity to uranyl ions via forming synergistic complexes.The CMPs exhibit high Brunauer-Emmett-Teller(BET)surface area,well-developed three-dimensional(3D)networks with hierarchical porosity,and favorable chemical and thermal stability because of the covalently cross-linked structure.Compared with the amino-free counterparts,the adsorption capacity of bifunctional CMPs was increased by almost 70%,from 105 to 174 mg/g,indicating evidently enhanced binding ability to uranium.Moreover,new insights into coordination mechanism were obtained by in-depth X-ray photoelectron spectroscopy(XPS)analysis and density functional theory(DFT)calculation,suggesting a dominant role of the oxime ligands forming a 1:1 metal ions/ligands(M/L)coordination model with uranyl ions while demonstrating the synergistic engagement of the amino functionalities via direct binding to uranium center and hydrogen-bonding involved secondary-sphere interaction.This work sheds light on the underlying principles of ortho-substituted functionalities directed synergistic effect to promote the coordination of amidoxime with uranyl ions.And the synthetic strategy established here would enable the task-specific development of more novel CMP-based functional materials for broadened applications. 展开更多
关键词 conjugated microporous polymers URANIUM adsorption synergistic coordination density functional theory
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Candidate therapeutic agents in a newly established triple wild-typemucosalmelanoma cell line 被引量:1
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作者 Chaoji Shi Ziyue Gu +13 位作者 shengming xu Houyu Ju Yunteng Wu Yong Han Jiayi Li Chuwen Li Jing Wu Lizhen Wang Jiang Li Guoyu Zhou Weimin Ye Guoxin Ren Zhiyuan Zhang Rong Zhou 《Cancer Communications》 SCIE 2022年第7期627-647,共21页
Background:Mucosalmelanoma has characteristically distinct genetic features and typically poor prognosis.The lack of representativemucosal melanoma models,especially cell lines,has hindered translational research on t... Background:Mucosalmelanoma has characteristically distinct genetic features and typically poor prognosis.The lack of representativemucosal melanoma models,especially cell lines,has hindered translational research on this melanoma subtype.In this study,we aimed to establish and provide the biological properties,genomic features and the pharmacological profiles of a mucosal melanoma cell line that would contribute to the understanding and treatment optimization of molecularly-defined mucosal melanoma subtype.Methods:The sample was collected from a 67-year-old mucosal melanoma patient and processed into pieces for the establishment of cell line and patientderived xenograft(PDX)model.The proliferation and tumorigenic property of cancer cells from different passageswere evaluated,andwhole-genome sequencing(WGS)was performed on the original tumor,PDX,established cell line,and the matched blood to confirm the establishment and define the genomic features of this cell line.AmpliconArchitect was conducted to depict the architecture of amplified regions detected by WGS.High-throughput drug screening(HTDS)assay including a total of 103 therapeutic agents was implemented on the established cell line,and selected candidate agents were validated in the corresponding PDX model.Results:A mucosal melanoma cell line,MM9H-1,was established which exhibited robust proliferation and tumorigenicity after more than 100 serial passages.Genomic analysis of MM9H-1,corresponding PDX,and the original tumor showed genetic fidelity across genomes,and MM9H-1 was defined as a triple wild-type(TWT)melanoma subtype lacking well-characterized“driver mutations”.Instead,the amplification of several oncogenes,telomerase reverse transcriptase(TERT),v-Rafmurine sarcoma viral oncogene homolog B1(BRAF),melanocyte Inducing transcription factor(MITF)and INO80 complex ATPase subunit(INO80),via large-scale genomic rearrangement potentially contributed to oncogenesis of MM9H-1.Moreover,HTDS identified proteasome inhibitors,especially bortezomib,as promising therapeutic candidates for MM9H-1,which was verified in the corresponding PDX model in vivo.Conclusions:We established and characterized a new mucosal melanoma cell line,MM9H-1,and defined this cell line as a TWT melanoma subtype lacking well-characterized“driver mutations”.The MM9H-1 cell line could be adopted as a unique model for the preclinical investigation of mucosal melanoma. 展开更多
关键词 BORTEZOMIB cell line extrachromosomal DNA high-throughput drug screening mucosal melanoma patient derived tumor cells patient-derived xenograft whole-genome sequencing
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