Molybdenum Substitution for Improving the Charge Compensation and Activity of Li2MnO3
文献类型：期刊论文
| 作者 | Ma, J ; Zhou, YN ; Gao, YR ; Kong, QY ; Wang, ZX ; Yang, XQ ; Chen, LQ |
| 刊名 | CHEMISTRY-A EUROPEAN JOURNAL
 |
| 出版日期 | 2014 |
| 卷号 | 20期号:28页码:8723 |
| 关键词 | charge transfer doping layered compounds lithium molybdenum |
| ISSN号 | 0947-6539 |
| 通讯作者 | Kong, QY (reprint author), Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA. |
| 中文摘要 | Lithium-rich layer-structured oxides xLi(2)MnO(3)center dot(1-x)LiMO2 (0 < x < 1, M=Mn, Ni, Co, etc.) are interesting and potential cathode materials for high energy-density lithium ion batteries. However, the characteristic charge compensation contributed by O2- in Li2MnO3 leads to the evolution of oxygen during the initial Li+ ion extraction at high voltage and voltage fading in subsequent cycling, resulting in a safety hazard and poor cycling performance of the battery. Molybdenum substitution was performed in this work to provide another electron donor and to enhance the electrochemical activity of Li2MnO3-based cathode materials. X-ray diffraction and adsorption studies indicated that Mo5+ substitution expands the unit cell in the crystal lattice and weakens the Li-O and Mn-O bonds, as well as enhancing the activity of Li2MnO3 by lowering its delithiation potential and suppressing the release of oxygen. In addition, the chemical environment of O2- ions in molybdenum-substituted Li2MnO3 is more reversible than in the unsubstituted sample during cycling. Therefore molybdenum substitution is expected to improve the performances of the Li2MnO3-based lithium-rich cathode materials. |
| 资助信息 | National Natural Science Foundation of China (NSFC) [51372268]; National 973 Program of China [2009CB220100]; U.S. Department of Energy; Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies [DEAC02-98CH10886] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/58959]  |
| 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 | Ma, J,Zhou, YN,Gao, YR,et al. Molybdenum Substitution for Improving the Charge Compensation and Activity of Li2MnO3[J]. CHEMISTRY-A EUROPEAN JOURNAL,2014,20(28):8723. |
| APA | Ma, J.,Zhou, YN.,Gao, YR.,Kong, QY.,Wang, ZX.,...&Chen, LQ.(2014).Molybdenum Substitution for Improving the Charge Compensation and Activity of Li2MnO3.CHEMISTRY-A EUROPEAN JOURNAL,20(28),8723. |
| MLA | Ma, J,et al."Molybdenum Substitution for Improving the Charge Compensation and Activity of Li2MnO3".CHEMISTRY-A EUROPEAN JOURNAL 20.28(2014):8723. |
入库方式： OAI收割
来源：物理研究所
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