Surface modification of Li1.2Mn0.54Co0.13Ni0.13O2 with conducting polypyrrole

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	Surface modification of Li1.2Mn0.54Co0.13Ni0.13O2 with conducting polypyrrole
	Wu, CR ; Fang, XP ; Guo, XW ; Mao, Y ; Ma, J ; Zhao, CC ; Wang, ZX ; Chen, LQ
刊名	JOURNAL OF POWER SOURCES
	2013
卷号	231 页码:44
关键词	Lithium-ion batteries Layered oxide cathode materials Polypyrrole Surface modification Electrochemical performance
ISSN号	0378-7753
通讯作者	Wang, ZX (reprint author), Chinese Acad Sci, Inst Phys, Lab Solid State Ion, POB 603, Beijing 100190, Peoples R China.
中文摘要	The lithium-rich solid solutions between layer-structured Li2MO3 (M = Mn, Zr, Ti) and LiM'O-2 (M' = Mn0.5Ni0.3,Mn0.33Co0.33Ni0.33, Co, etc.) are attractive cathode materials for lithium ion batteries with high specific energies. However, these solid solutions suffer from low coulombic efficiency due to the loss of oxygen in the form of Li2O and electrolyte decomposition at high potentials in the initial cycle and poor cyclability due to decreased number of sites for lithium ion insertion/extraction in the subsequent cycles. In addition, the presence of a solid electrolyte interphase layer on these solid solutions is still in argument. In this work, Li1.2Mn0.54Co0.13Ni0.13O2 (0.5Li(2)MnO(3)center dot 0.5LiMn(0.33)Co(0.33)Ni(0.33)O(2)) is prepared by Pechini method and coated with conducting polypyrrole (PPy). The physical characterization (XRD, SEM, HRTEM, FTIR) and electrochemical evaluation (EIS, CV and galvanostatic cycling) demonstrate the effectiveness of the surface modification on improving the electrochemical performances of the solid solution and the presence of a solid electrolyte interphase layer on the charged PPy-modified material. (C). 2012 Elsevier B.V. All rights reserved.
资助信息	National 973 Program of China [2009CB220100]; National Natural Science Foundation of China (NSFC) [20974120]
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57531]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wu, CR,Fang, XP,Guo, XW,et al. Surface modification of Li1.2Mn0.54Co0.13Ni0.13O2 with conducting polypyrrole[J]. JOURNAL OF POWER SOURCES,2013,231:44.
APA	Wu, CR.,Fang, XP.,Guo, XW.,Mao, Y.,Ma, J.,...&Chen, LQ.(2013).Surface modification of Li1.2Mn0.54Co0.13Ni0.13O2 with conducting polypyrrole.JOURNAL OF POWER SOURCES,231,44.
MLA	Wu, CR,et al."Surface modification of Li1.2Mn0.54Co0.13Ni0.13O2 with conducting polypyrrole".JOURNAL OF POWER SOURCES 231(2013):44.