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. |
入库方式： OAI收割
来源：物理研究所
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