A Strategy to Improve Cyclic Performance of LiNi05Mn15O4 in a Wide Voltage Region by Ti-Doping

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	A Strategy to Improve Cyclic Performance of LiNi05Mn15O4 in a Wide Voltage Region by Ti-Doping
	Lin, M. ; Wang, S. H. ; Gong, Z. L. ; Huang, X. K. ; Yang, Y. ; Yang Y(杨勇)
刊名	http://dx.doi.org/10.1149/2.004305jes
	2013
关键词	LITHIUM-ION BATTERIES SOL-GEL METHOD V CATHODE MATERIALS ELECTROCHEMICAL PROPERTIES SPINEL ELECTRODE CR FE NI SUBSTITUTION
英文摘要	National Basic Research Program of China (973 program) [2011CB935903]; National Natural Science Foundation of China [21233004, 21021002]; A strategy to improve cyclic performance of 5 V spinel LiNi0.5Mn1.5O4 in a wide voltage region (4.95-2.0 V.) by Ti-doping has been proposed and demonstrated for the first time. The effects of Ti substitution for Mn on the structure and electrochemical properties of the LiNi0.5Mn1.5-xTixO4 (0 <= x <= 0.6) during cycling between 4.95 and 2.0 V were investigated. X-ray diffraction (XRD) results show that all of these materials are cubic spinel structure with a space group of Fd (3) over barm, where their unit cell parameter a increases with the substituting amount of Mn by Ti, which is in agreement with the fact that the ionic radius of Ti4+ (74.5 pm) is much larger than that of Mn4+ (67 pm). Electrochemical test results show that proper amount of Ti substitution for Mn is able to significantly improve the cyclic performance of LiNi0.5Mn1.5-xTixO4 spinel during cycling at 4.95-2.0 V, especially for the capacity retention of the ca. 2.7 V plateau. Take LiNi0.5Mn1.0Ti0.5O4 as an example, the capacity retention in the upper (4.95-3.0 V) and lower voltage (3.0-2.5 V) regions after 100 cycles are 57.1% and 79.8%, respectively, while they are only 47.0% and 24.5% for un-substituted LiNi0.5Mn1.5O4 sample, respectively. (C) 2013 The Electrochemical Society.
语种	英语
出版者	ELECTROCHEMICAL SOC INC
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88767]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Lin, M.,Wang, S. H.,Gong, Z. L.,et al. A Strategy to Improve Cyclic Performance of LiNi05Mn15O4 in a Wide Voltage Region by Ti-Doping[J]. http://dx.doi.org/10.1149/2.004305jes,2013.
APA	Lin, M.,Wang, S. H.,Gong, Z. L.,Huang, X. K.,Yang, Y.,&杨勇.(2013).A Strategy to Improve Cyclic Performance of LiNi05Mn15O4 in a Wide Voltage Region by Ti-Doping.http://dx.doi.org/10.1149/2.004305jes.
MLA	Lin, M.,et al."A Strategy to Improve Cyclic Performance of LiNi05Mn15O4 in a Wide Voltage Region by Ti-Doping".http://dx.doi.org/10.1149/2.004305jes (2013).