中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Overpotential and electrochemical impedance analysis on Cr2O3 thin film and powder electrode in rechargeable lithium batteries

文献类型:期刊论文

作者Sun, JP ; Tang, K ; Yu, XQ ; Hu, J ; Li, H ; Huang, XJ
刊名SOLID STATE IONICS
出版日期2008
卷号179期号:40页码:2390
关键词METAL FLUORIDE NANOCOMPOSITES LI-ION BATTERIES HIGH-CAPACITY NEGATIVE-ELECTRODE ANODE MATERIALS STORAGE REACTIVITY MECHANISM TEXTURE OXIDES
ISSN号0167-2738
通讯作者Li, H (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China.
中文摘要The overpotentials of Cr2O3 thin film and powder electrodes as well as various benchmark anodes and cathodes in rechargeable lithium batteries have been compared by analyzing the galvanostatic voltage profiles. Li-storage in the Cr2O3 electrode through the conversion reaction shows higher overpotential values than through other Li-storage mechanisms. The origins of the high overpotential of the Cr2O3 electrode have been studied by electrochemical impedance spectroscopy. It is found that the ohmic polarization, charge transfer resistance and diffusion impedance of the Cr2O3 electrode decrease significantly with the insertion of lithium and increase with the extraction of lithium. The calculated overpotential contribution from the diffusion impedance is well consistent with the value deduced from the galvanostatic voltage profiles. It means that the sluggish diffusion should be the main origin for high polarization of Cr2O3 electrodes. (C) 2008 Elsevier B.V. All rights reserved.
收录类别SCI
资助信息Natural Science Foundation of China [50672122, 50730005]; 863 project [2006AA03Z346]; 973 project [2007CB936501]
语种英语
公开日期2013-09-24
源URL[http://ir.iphy.ac.cn/handle/311004/50530]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Sun, JP,Tang, K,Yu, XQ,et al. Overpotential and electrochemical impedance analysis on Cr2O3 thin film and powder electrode in rechargeable lithium batteries[J]. SOLID STATE IONICS,2008,179(40):2390.
APA Sun, JP,Tang, K,Yu, XQ,Hu, J,Li, H,&Huang, XJ.(2008).Overpotential and electrochemical impedance analysis on Cr2O3 thin film and powder electrode in rechargeable lithium batteries.SOLID STATE IONICS,179(40),2390.
MLA Sun, JP,et al."Overpotential and electrochemical impedance analysis on Cr2O3 thin film and powder electrode in rechargeable lithium batteries".SOLID STATE IONICS 179.40(2008):2390.

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来源:物理研究所

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