Research on cathode material of Li-ion battery by yttrium doping

IMR OpenIR

	Research on cathode material of Li-ion battery by yttrium doping
其他题名	Research on cathode material of Li-ion battery by yttrium doping
	Tian Yanwen 1; Kang Xiaoxue 1; Liu Liying 2; Xu Chaqing 1; Qu Tao 1
	2008
发表期刊	JOURNAL OF RARE EARTHS
ISSN	1002-0721
卷号	26 期号:2 页码:279-283
摘要	Modification of LiFePO4, LiMn2O4 and Li1+xV3O8 by doping yttrium was investigated. The influences of doping Y on structure, morphology and electrochemical performance of cathode materials were investigated systematically. The results indicated that the mechanisms of Y doping in three cathode materials were different, so the influences on the material performance were different. The crystal structure of the three materials was not changed by Y doping. However, the crystal parameters were influenced. The crystal parameters of LiMn2O4 became smaller, and the interlayer distance of (100) crystal plane of Li1+xV3O8 was lengthened after Y doping. The grain size of Y-doped LiFePO4 became smaller and grain morphology became more regular than that of undoped LiFePO4. It indicated that Y doping had no influence on crystal particle and morphology of LiMn2O4. The morphology of Li1+xV3O8 became irregular and its size became larger with the increase of Y. For LiFePO4 and Li1+xV3O8, both the initial discharge capacities and the cyclic performance were improved by Y doping. For LiMn2O4, the cyclic performance became better and the initial discharge capacities declined with increasing Y doping.
其他摘要	Modification of LiFePO4, LiMn2O4 and Li1+xV3O8 by doping yttrium was investigated. The influences of doping Y on structure, morphology and electrochemical performance of cathode materials were investigated systematically. The results indicated that the mechanisms of Y doping in three cathode materials were different, so the influences on the material performance were different. The crystal structure of the three materials was not changed by Y doping. However, the crystal parameters were influenced. The crystal parameters of LiMn2O4 became smaller, and the interlayer distance of (100) crystal plane of Li1+xV3O8 was lengthened after Y doping. The grain size of Y-doped LiFePO4 became smaller and grain morphology became more regular than that of undoped LiFePO4. It indicated that Y doping had no influence on crystal particle and morphology of LiMn2O4. The morphology of Li1+xV3O8 became irregular and its size became larger with the increase of Y. For LiFePO4 and Li1+xV3O8, both the initial discharge capacities and the cyclic performance were improved by Y doping. For LiMn2O4, the cyclic performance became better and the initial discharge capacities declined with increasing Y doping.
关键词	ELECTROCHEMICAL PROPERTIES LITHIUM INSERTION SPINEL MANGANESE FE CO yttrium cathode material Li-ion battery doping conductivity discharge capacity rare earths
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3316176
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/152894
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.中国科学院广州地球化学研究所
推荐引用方式 GB/T 7714	Tian Yanwen,Kang Xiaoxue,Liu Liying,et al. Research on cathode material of Li-ion battery by yttrium doping[J]. JOURNAL OF RARE EARTHS,2008,26(2):279-283.
APA	Tian Yanwen,Kang Xiaoxue,Liu Liying,Xu Chaqing,&Qu Tao.(2008).Research on cathode material of Li-ion battery by yttrium doping.JOURNAL OF RARE EARTHS,26(2),279-283.
MLA	Tian Yanwen,et al."Research on cathode material of Li-ion battery by yttrium doping".JOURNAL OF RARE EARTHS 26.2(2008):279-283.