Electrochemical properties of 0.6Li[Li1/3Mn2/3]O2–0.4LiNixMnyCo1-x-yO2 cathode materials for lithium-ion batteries

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	Electrochemical properties of 0.6Li[Li1/3Mn2/3]O2–0.4LiNixMnyCo1-x-yO2 cathode materials for lithium-ion batteries
	夏永高、刘兆平 ; Jun Wang, Bao Qiu, Hailiang Cao, Yonggao Xia, Zhaoping Liu
刊名	Journal of Power Sources
	2012-07-07
卷号	25 期号:218 页码:128—133
通讯作者	夏永高、刘兆平
合作状况	李雨桐
中文摘要	Solid solutions between Li[Li1/3Mn2/3]O2 and LiMO2 (M ？ Ni1/3Mn1/3Co1/3, Ni0.4Mn0.4Co0.2, Ni0.45 Mn0.45Co0.1, Ni0.5Mn0.2Co0.3, and Ni0.5Mn0.3Co0.2) have been synthesized by a solid-state reaction method. The as-prepared Li1.2Ni0.13Mn0.54Co0.13O2, Li1.2Ni0.16Mn0.56Co0.08O2, i1.2Ni0.18Mn0.58Co0.04O2, Li1.2Ni0.2Mn0.48Co0.12O2, and Li1.2Ni0.2Mn0.52Co0.08O2 solid solutions cathode materials can deliver discharge capacities of 267, 262, 253, 235, and 238 mAh g 1, respectively, at a charge/discharge current density of 25 mA g 1 in the voltage range of 2.5e4.7 V. These cathodes all have initial coulombic efficiencies larger than 80%, and show capacity loss less than 0.13% per cycle while cycling at 125 mA g 1 for 50 cycles. From Rietveld refinement results and electrochemical impedance spectra (EIS) analysis, it is found that the highest charge/discharge capacity values of Li1.2Ni0.13Mn0.54Co0.13O2 cathode with the lowest Ni content among them are attributed to the lowest cation mixing. While both the Li1.2Ni0.2Mn0.48Co0.12O2 and Li1.2Ni0.2Mn0.52Co0.08O2 cathode materials with higher Ni content exhibit better rate capabilities due to their lower charge transfer resistances and higher electrical conductivities than those of other samples.
学科主题	物理化学
原文出处	CSCD收录
公开日期	2013-12-16
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/9658]
专题	宁波材料技术与工程研究所_宁波所知识产出
推荐引用方式 GB/T 7714	夏永高、刘兆平,Jun Wang, Bao Qiu, Hailiang Cao, Yonggao Xia, Zhaoping Liu. Electrochemical properties of 0.6Li[Li1/3Mn2/3]O2–0.4LiNixMnyCo1-x-yO2 cathode materials for lithium-ion batteries[J]. Journal of Power Sources,2012,25(218):128—133.
APA	夏永高、刘兆平,&Jun Wang, Bao Qiu, Hailiang Cao, Yonggao Xia, Zhaoping Liu.(2012).Electrochemical properties of 0.6Li[Li1/3Mn2/3]O2–0.4LiNixMnyCo1-x-yO2 cathode materials for lithium-ion batteries.Journal of Power Sources,25(218),128—133.
MLA	夏永高、刘兆平,et al."Electrochemical properties of 0.6Li[Li1/3Mn2/3]O2–0.4LiNixMnyCo1-x-yO2 cathode materials for lithium-ion batteries".Journal of Power Sources 25.218(2012):128—133.