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Research on cathode material of Li-ion battery by yttrium doping
Alternative TitleResearch on cathode material of Li-ion battery by yttrium doping
Tian Yanwen1; Kang Xiaoxue1; Liu Liying2; Xu Chaqing1; Qu Tao1
2008
Source PublicationJOURNAL OF RARE EARTHS
ISSN1002-0721
Volume26Issue:2Pages:279-283
AbstractModification 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.
Other AbstractModification 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.
KeywordELECTROCHEMICAL PROPERTIES LITHIUM INSERTION SPINEL MANGANESE FE CO yttrium cathode material Li-ion battery doping conductivity discharge capacity rare earths
Indexed ByCSCD
Language英语
CSCD IDCSCD:3316176
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/152894
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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