CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Phase Separations in LiFe1-xMnxPO4: A Random Stack Model for Efficient Cathode Materials
Huang, WF; Tao, S; Zhou, J; Si, C; Chen, X; Huang, W; Jin, CH; Chu, WS; Song, L; Wu, ZY; chuws@ustc.edu.cn; song2012@ustc.edu.cn; wuzy@ustc.edu.cn
2014
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume118Issue:2Pages:796—803
AbstractOlivine-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.
KeywordX-ray-absorption Lithium-ion Batteries Lifepo4 Electrodes Spectroscopy Edge Ifeffit Network Xafs Iron
Indexed BySCI
Language英语
WOS IDWOS:000330417100006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14306
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorchuws@ustc.edu.cn; song2012@ustc.edu.cn; wuzy@ustc.edu.cn
Recommended Citation
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.,...&wuzy@ustc.edu.cn.(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.
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