Insight into cobalt-doping in Li2FeSiO4 cathode material for lithium-ion battery
Zhang, LL; Duan, S; Yang, XL; Liang, G; Huan, YH; Cao, XZ; Yang, J; Li, M; Croft, MC; Lewis, C; Cao XZ(曹兴忠); Yang J(杨静)
刊名JOURNAL OF POWER SOURCES
2015
卷号274页码:194-202
关键词Lithium ion battery Cathode Lithium iron silicate Cobalt-doping
学科分类Electrochemistry; Energy & Fuels
DOI10.1016/j.jpowsour.2014.10.048
文章类型Article
英文摘要This study presents the preparation and electrochemical performance of cobalt-doped Li2FeSiO4/C (Codoped LFS/C) composite by using a solid-state reaction assisted with refluxing process. The Co-doped LFS/C composite delivers a higher discharge capacity of 142.5 mAh g(-1) at 3.0 C even after 100 cycles compared with pristine LFS/C. A clear feature of cobalt-doping in Li2FeSiO4 has been specified by X-ray powder diffraction, X-ray photoelectron spectroscopy coupled with Ar-ion sputtering, X-ray absorption spectroscopy, and positron annihilation lifetime spectroscopy. It is confirmed that Co has been successfully doped into the lattice of LFS, and Co-doping does not change the monoclinic structure of LFS and the oxidation state of Fe. Positron annihilation lifetime spectroscopy analysis further demonstrates that Co-doping increases the defect concentration and the electronic conductivity of LFS. The results clarify the nature of cobalt-doping in LFS and are helpful for understanding the enhancement mechanism of the electrochemical performance of LFS and other cathode materials. (C) 2014 Elsevier B.V. All rights reserved.
类目[WOS]Electrochemistry ; Energy & Fuels
收录类别SCI
WOS记录号WOS:000347268700025
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被引频次:24[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/311005/228142
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Zhang, LL,Duan, S,Yang, XL,et al. Insight into cobalt-doping in Li2FeSiO4 cathode material for lithium-ion battery[J]. JOURNAL OF POWER SOURCES,2015,274:194-202.
APA Zhang, LL.,Duan, S.,Yang, XL.,Liang, G.,Huan, YH.,...&杨静.(2015).Insight into cobalt-doping in Li2FeSiO4 cathode material for lithium-ion battery.JOURNAL OF POWER SOURCES,274,194-202.
MLA Zhang, LL,et al."Insight into cobalt-doping in Li2FeSiO4 cathode material for lithium-ion battery".JOURNAL OF POWER SOURCES 274(2015):194-202.
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