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Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials
Huang WF(黄伟峰); Huang, WF; Tao, S; Zhou, J; Si, C; Chen, X; Huang, W; Jin, CH; Chu, WS; Song, L; Wu, ZY; Si C(姒程); Wu ZY(吴自玉)
2014
发表期刊JOURNAL OF PHYSICAL CHEMISTRY C
卷号118期号:2页码:796-803
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.
学科领域Chemistry; Science & Technology - Other Topics; Materials Science
DOI10.1021/jp4081564
收录类别SCI
WOS记录号WOS:000330417100006
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225134
专题多学科研究中心
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GB/T 7714
Huang WF,Huang, WF,Tao, S,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 黄伟峰.,Huang, WF.,Tao, S.,Zhou, J.,Si, C.,...&吴自玉.(2014).Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials.JOURNAL OF PHYSICAL CHEMISTRY C,118(2),796-803.
MLA 黄伟峰,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.
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