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提高电容性电化学储能装置能量容量的一些尝试(英文) 被引量:2
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作者 余林颇 陈政 《电化学》 CSCD 北大核心 2017年第5期533-547,共15页
本文从作者所在的课题组在超级电容器和超级电容电池方向的研究内容为基础,在电极材料和装置层面综述了电容性电化学储能装置的发展.导电聚合物和过渡金属氧化物分别与碳纳米管复合后的复合物能显著提高前两者作为电容性法拉第储能电极... 本文从作者所在的课题组在超级电容器和超级电容电池方向的研究内容为基础,在电极材料和装置层面综述了电容性电化学储能装置的发展.导电聚合物和过渡金属氧化物分别与碳纳米管复合后的复合物能显著提高前两者作为电容性法拉第储能电极的电容性能.活性碳和碳黑等一类碳材料则可作为非法拉第储能的电极材料.通过对超级电容器正负极电容做相应的匹配调整可以提高超级电容器的最大充电电压,从而提高超级电容器的能量容量.此外,为了与实际设备相匹配,超级电容可以以双极板的方式串联堆积,满足高电压的需求.超级电容电池作为新一代的电容性电化学储能装置,分别由具有电容性和法拉第电荷储存原理的电极组成,具有高比功率和高比能量的特点,也是近年来的研究热点. 展开更多
关键词 超级电容 超级电容池 电容 碳纳米管 活性碳
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Critical roles of molybdate anions in enhancing capacitive and oxygen evolution behaviors of LDH@PANI nanohybrids 被引量:2
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作者 Qiang Hu Hua Wang +7 位作者 Feifei Xiang Qiaoji Zheng Xinguo Ma Yu Huo Fengyu Xie Chenggang Xu Dunmin Lin Jisong Hu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第6期980-993,共14页
Low-overpotential layered hydroxides(LDHs)with high theoretical capacity are promising electrodes for supercapaterry and oxygen evolution reaction;however,the low electronic conductivity and insufficient active sites ... Low-overpotential layered hydroxides(LDHs)with high theoretical capacity are promising electrodes for supercapaterry and oxygen evolution reaction;however,the low electronic conductivity and insufficient active sites of bulk LDHs increase the internal resistance and reduce the capacity and oxygen-production efficiency of electrodes.Herein,we prepared a polyaniline-coated Ni-Co-layered double hydroxide intercalated with MoO_(4)^(2−)(M-LDH@PANI)composite electrode using a two-step method.As the amount of MoO_(4)^(2−)in the LDH increases,acicular microspheres steadily evolve into flaky microspheres with a high surface area,providing more active electrochemical sites.Moreover,the amorphous PANI coating of M-LDH boosts the electronic conductivity of the composite electrode.Accordingly,the M-LDH@PANI at an appropriate level of MoO_(4)^(2−)exhibits significantly enhanced energy storage and catalytic performance.Experimental analyses and theoretical calculations reveal that a small amount of MoO_(4)^(2−)is conducive to the expansion of LDH interlayer spacing,while an excessive amount of MoO_(4)^(2−)combines with the H atoms of LDH,thus competing with OH^(−),resulting in reduced electrochemical performance.Moreover,M-LDH flaky microspheres can efficiently modulate deprotonation energy,greatly accelerating surface redox reactions.This study provides an explanation for an unconventional mechanism,and a method for the modification of LDH-based materials for anion intercalation. 展开更多
关键词 Layered hydroxide LDH PANI MoO_(4)^(2−) Intercalated hierarchical structures Supercapaterry Electrocatalyst
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Hydrothermal synthesis and energy storage performance of ultrafine Ce2Sn2O7 nanocubes 被引量:2
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作者 HUO Yi-feng QIN Ning +3 位作者 LIAO Cheng-zhu FENG Hui-fen GU Ying-ying CHENG Hua 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第6期1416-1425,共10页
Ultrafine cube-shape Ce2Sn2O7 nanoparticles crystallized in pure pyrochlore phase with a size of about 10 nm have been successfully synthesized by a facile hydrothermal method.Conditional experiments have been conduct... Ultrafine cube-shape Ce2Sn2O7 nanoparticles crystallized in pure pyrochlore phase with a size of about 10 nm have been successfully synthesized by a facile hydrothermal method.Conditional experiments have been conducted to optimize the processing parameters including temperature,pH,reaction duration,precipitator types to obtain phase-pure Ce2Sn2O7.The crystal structure,morphology and sizes and specific surface area have been characterized by X-ray diffractometer(XRD),Raman spectrum,transmission electron microscope(TEM),high resolution transmission electron microscope(HRTEM),and Brunauer-Emmett-Teller(BET).The as-synthesized Ce2Sn2O7 ultrafine nanocubes have been evaluated as electrode materials for pseudo-capacitors and lithium ion batteries.When testing as supercapacitors,a high specific capacitance of 222 F/g at 0.1 A/g and a good cycling stability with a capacitance retention of higher than 86%after 5000 cycle have been achieved.When targeted for anode material for lithium ion batteries,the nanocubes deliver a high specific reversible capacity of more than 900 mA·h/g at 0.05C rate.The rate capability and cycling performance is also very promising as compared with the traditional graphite anode. 展开更多
关键词 SUPERCAPACITORS lithium ion batteries composite oxides ultrafine nanoparticles hydrothermal PYROCHLORE
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Study on ultracapacitor-battery hybrid power system for PHEV applications 被引量:14
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作者 熊瑞 He Hongwen Wang Yi Zhang Xiaowei 《High Technology Letters》 EI CAS 2010年第1期23-28,共6页
For the battery only power system is hard to meet the energy and power requirements reasonably, a hybrid power system with uhracapacitor and battery is studied. A Topology structure is analyzed that the uhracapacitor ... For the battery only power system is hard to meet the energy and power requirements reasonably, a hybrid power system with uhracapacitor and battery is studied. A Topology structure is analyzed that the uhracapacitor system is connected with battery pack parallel after a bidirectional DC/DC converter. The ultracapacitor, battery and the hybrid power system are modeled. For the plug-in hybrid electric vehicle (PHEV) application, the control target and control strategy of the hybrid power system are put forward. From the simulation results based on the Chinese urban driving cycle, the hybrid power system could meet the peak power requirements reasonably while the battery pack' s current is controlled in a reasonable limit which will be helpful to optimize the battery pack' s working conditions to get long cycling life and high efficiency. 展开更多
关键词 BATTERY ULTRACAPACITOR hybrid power system plug-in hybrid electric vehicle (PHEV) simulation
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Supercapacitors and Battery Energy Management Based on New European Driving Cycle 被引量:1
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作者 Mamadou Bailo Camaral Brayima Dakyo Hamid Gualous 《Journal of Energy and Power Engineering》 2012年第2期168-177,共10页
This paper presents a new strategy of embedded energy management between battery and supercapacitors (SC) for hybrid electric vehicles (HEV) applications. This proposal is due to the present trend in the field, kn... This paper presents a new strategy of embedded energy management between battery and supercapacitors (SC) for hybrid electric vehicles (HEV) applications. This proposal is due to the present trend in the field, knowing that the major drawback of the HEV is the autonomy problem. Thus, using supercapacitors and battery with a good energy management improves the HEV performances. The main contribution of this paper is focused on DC-bus voltage and currents control strategies based on polynomial controller. These strategies are implemented in PICI8F4431 microcontroller for DC/DC converters control. Due to reasons of cost and available components (no optimized), such as the battery and power semiconductors (IGBT), the experimental tests are carried out in reduced scale (2.7 kW). Through some simulations and experimental results obtained in reduced scale, the authors present an improved energy management strategy for HEV. 展开更多
关键词 BATTERY electric machine energy storage SUPERCAPACITORS polynomial control hybrid electric vehicles DC/DCconverter.
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Recent advances in materials and device technologies for aqueous hybrid supercapacitors 被引量:4
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作者 Qiuyue Gui Deliang Ba +3 位作者 Linpo Li Wenyi Liu Yuanyuan Li Jinping Liu 《Science China Materials》 SCIE EI CAS CSCD 2022年第1期10-31,共22页
Aqueous hybrid supercapacitors(AHSCs)offer potential safety and eco-friendliness compared with conventional electrochemical energy storage devices that use toxic and flammable organic electrolytes.They can serve as th... Aqueous hybrid supercapacitors(AHSCs)offer potential safety and eco-friendliness compared with conventional electrochemical energy storage devices that use toxic and flammable organic electrolytes.They can serve as the bridge between aqueous batteries and aqueous supercapacitors by combining the advantages of high energy of the battery electrode and high power as well as long lifespan of the capacitive electrode.Over the past few decades,extensive research efforts have been devoted to developing advanced materials and fascinating device architectures for AHSCs.However,further development related to the compatibilities between the battery-type electrode and capacitive electrode remains stagnant mainly due to discrepancy encountered in terms of reaction kinetics and capacity.This review focuses on the recent progress made in the field of AHSCs via elucidating the main concepts on the design of battery and capacitive electrodes and emerging electrolytes.In particular,ingenious AHSCs that possess either better flexibility toward materials selection or better device functionality such as those with“dual-ion”energy storage mechanism and non-polarity feature are also discussed.Recent advances and unresolved issues in multivalent ion hybrid devices(in particular,zinc-ion AHSCs)are further outlined.Finally,future research directions and challenges for AHSCs are presented,which are anticipated to deliver higher energy and demonstrate greater multifunctionalities for more breakthrough technology applications. 展开更多
关键词 aqueous hybrid supercapacitors electrode materials electrolytes device technologies
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Filling and unfilling carbon capsules with transition metal oxide nanoparticles for Li-ion hybrid supercapacitors:towards hundred grade energy density
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作者 安翠华 刘喜正 +1 位作者 高振 丁轶 《Science China Materials》 SCIE EI CSCD 2017年第3期217-227,共11页
Li-ion hybrid supercapacitors (Li-HECs) facilitate effective combination of the advantages of supercapacitors and Li-ion batteries (LIBs). However, challenges remain in designing and preparing suitable anode and c... Li-ion hybrid supercapacitors (Li-HECs) facilitate effective combination of the advantages of supercapacitors and Li-ion batteries (LIBs). However, challenges remain in designing and preparing suitable anode and cathode materials, which often require tedious and expensive procedures. Herein, we demonstrated that hollow N-doped carbon capsules (HNC) with and without a Fe304 nanoparticle core can respectively function as the anode and the cathode in very-high-performance Li-HECs. The Fe3Oa@NC anode exhibited a high reversible specific capacity exceeding 1530 mA h g^-1 at 100 mA g^-1 and excellent rate capability (45% capacity retention from 0.1 to 5 A g^-1) and cycle stability (〉97% retention after 100 cycles). Moreover, high rate performance was achieved in a full-cell using the HNC cathode. By combining the respective structural advantages of the components, the hybrid device with Fe3Oa@NC//HN C exhibited a remark- able energy density of 185 W h kg^-1 at a power density of 39 W kg^-1. The hybrid device furnished a battery-inaccessible power density of 28 kW kg^-1 with rapid charging/discharging within 9 s at an energy density of 95 W h kg^-1. 展开更多
关键词 carbon capsules FE3O4 high energy density Li-ion hybrid supercapacitor
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Role of binary metal chalcogenides in extending the limits of energy storage systems:Challenges and possible solutions
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作者 Muhammad Yousaf Ufra Naseer +7 位作者 Imran Ali Yiju Li Waseem Aftab Asif Mahmood Nasir Mahmood Peng Gao Yinzhu Jiang Shaojun Guo 《Science China Materials》 SCIE EI CAS CSCD 2022年第3期559-592,共34页
Binary metal chalcogenides(BMCs)have shown better electrochemical performance compared with their mono metal counterparts owing to their abundant phase interfaces,higher active sites,faster electrochemical kinetics an... Binary metal chalcogenides(BMCs)have shown better electrochemical performance compared with their mono metal counterparts owing to their abundant phase interfaces,higher active sites,faster electrochemical kinetics and higher electronic conductivity.Nevertheless,their performance still undergoes adverse decline during electrochemical processes mainly due to poor intrinsic ionic conductivities,large volume expansions,and structural agglomeration and fracture.To tackle these problems,various strategies have been applied to engineer the BMC nanostructures to obtain optimized electrode materials.However,the lack of understanding of the electrochemical response of BMCs still hinders their large-scale application.This review not only highlights the recent progress and development in the preparation of BMC-based electrode materials but also explains the kinetics to further understand the relation between structure and performance.It will also explain the engineering of BMCs through nanostructuring and formation of their hybrid structures with various carbonaceous materials and three-dimensional(3 D)templates.The review will discuss the detailed working mechanism of BMC-based nanostructures in various electrochemical energy storage(EES)systems including supercapacitors,metal-ion batteries,metal-air batteries,and alkaline batteries.In the end,major challenges and prospective solutions for the development of BMCs in EES devices are also outlined.We believe that the current review will provide a guideline for tailoring BMCs for better electrochemical devices. 展开更多
关键词 binary metal chalcogenides NANOMATERIALS energy storage devices SUPERCAPACITORS BATTERIES
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