Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials
文献类型：期刊论文
| 作者 | Huang, WF ; Tao, S ; Zhou, J ; Si, C ; Chen, X ; Huang, W ; Jin, CH ; Chu, WS ; Song, L ; Wu, ZY |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2014 |
| 卷号 | 118期号:2页码:796—803 |
| 关键词 | X-RAY-ABSORPTION LITHIUM-ION BATTERIES LIFEPO4 ELECTRODES SPECTROSCOPY EDGE IFEFFIT NETWORK XAFS IRON |
| ISSN号 | 1932-7447 |
| 通讯作者 | chuws@ustc.edu.cn ; song2012@ustc.edu.cn ; wuzy@ustc.edu.cn |
| 英文摘要 | Olivine-type LiFe1-xMnxPO4 compounds were systematically synthesized by a solvothermal method. Synchrotron radiation X-ray absorption spectroscopy combined with first-principles calculations and energy-dispersive Xray spectroscopy measurements show that the as-prepared LiFe1-xMnxPO4 samples contain two different phases: LiFePO4 and LiMnPO4. Actually, due to the crystal field effect, these two structures are randomly stacked and characterized by a pronounced structural distortion of the MO6 (M: Fe or Mn) octahedra. Moreover, increasing the Mn doping concentration, the distortion of the MO6 octahedra increases. Considering the size of LiMnPO4 stacks and the distortion of MO6 octahedra, the best performance occurs at the optimal Mn doping concentration. Among, the different Fe/Mn ratios, the electrochemical tests show that the as-prepared LiFe0.75Mn0.25PO4 sample exhibits the best electrochemical performance. Moreover, in order to optimize electrochemical performances, data point out that the doping procedure may control the size of the LiMnPO4 stacks, but it is also necessary to control the interplay between the increase of the working voltage and the electrical conductivity of LiMnPO4 stacks. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000330417100006 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/14306]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Huang, WF,Tao, S,Zhou, J,et al. Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2014,118(2):796—803. |
| APA | Huang, WF.,Tao, S.,Zhou, J.,Si, C.,Chen, X.,...&Wu, ZY.(2014).Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials.JOURNAL OF PHYSICAL CHEMISTRY C,118(2),796—803. |
| MLA | Huang, WF,et al."Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials".JOURNAL OF PHYSICAL CHEMISTRY C 118.2(2014):796—803. |
入库方式： OAI收割
来源：上海应用物理研究所
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