Investigation of the structural changes in Li1-xFePO4 upon charging by synchrotron radiation techniques
文献类型：期刊论文
| 作者 | Wang, XJ ; Jaye, C ; Nam, KW ; Zhang, B ; Chen, HY ; Bai, JM ; Li, H ; Huang, XJ ; Fischer, DA ; Yang, XQ |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY
 |
| 出版日期 | 2011 |
| 卷号 | 21期号:30页码:11406 |
| 关键词 | X-RAY-DIFFRACTION LI-ION BATTERIES LITHIUM BATTERIES UNSUPPORTED CLAIMS LIFEPO4 SPECTROSCOPY ELECTRODE LIXFEPO4 CARBON MN |
| ISSN号 | 0959-9428 |
| 通讯作者 | Yang, XQ: Brookhaven Natl Lab, Upton, NY 11973 USA. |
| 中文摘要 | A systematic study on a LiFePO4 sample with 600 nm particle size was carried out to investigate the electronic and crystal structure changes during charge and their relationships with the charging curve. In situ X-ray diffraction data collected at 0.1C rate during first charge shows that the crystal FePO4 is observed at x = 0.3 in Li1-xFePO4, with significant delay than the beginning of the charge plateau. On the other hand, in situ X-ray absorption spectra for the Fe K-edge collected at 0.1C during first charge show that the average oxidation of Fe2+ to Fe3+ almost synchronized with the charging curve. In addition, the ex-situ soft X-ray absorption data for the Fe LII-III edges using surface sensitive partial electron yield detection mode show that the lithium content changes at the surface of the sample particles synchronized or ahead to the charge curve, while the data collected at the same time using bulk sensitive fluorescence yield detection mode show that the lithium content changes in the bulk of the particles lag behind the charging curve. The contents of FePO4 and LiFePO4 calculated from in situ XRD in relating to the charge curve are quite different than those calculated from in situ XAS and ex-situ soft X-ray absorption data. This tells us that cautious need to be taken when using XRD data alone to track the state of charge of LiFePO4 samples, significant delay in observing the new crystal phase formation could occur, especially at relatively high charging rate. |
| 收录类别 | SCI |
| 资助信息 | Northeastern Center for Chemical Energy Storage; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001294, BNL: DEAC02-98CH10886] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40314]  |
| 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 | Wang, XJ,Jaye, C,Nam, KW,et al. Investigation of the structural changes in Li1-xFePO4 upon charging by synchrotron radiation techniques[J]. JOURNAL OF MATERIALS CHEMISTRY,2011,21(30):11406. |
| APA | Wang, XJ.,Jaye, C.,Nam, KW.,Zhang, B.,Chen, HY.,...&Yang, XQ.(2011).Investigation of the structural changes in Li1-xFePO4 upon charging by synchrotron radiation techniques.JOURNAL OF MATERIALS CHEMISTRY,21(30),11406. |
| MLA | Wang, XJ,et al."Investigation of the structural changes in Li1-xFePO4 upon charging by synchrotron radiation techniques".JOURNAL OF MATERIALS CHEMISTRY 21.30(2011):11406. |
入库方式： OAI收割
来源：物理研究所
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