Enhanced electrochemical performances of 5 V spinel LiMn1.58Ni0.42O4   cathode materials by coating with LiAlO2

doi:10.1016/j.jpowsour.2013.03.143

CORC > 北京大学 > 化学与分子工程学院

	Enhanced electrochemical performances of 5 V spinel LiMn1.58Ni0.42O4 cathode materials by coating with LiAlO2
	Cheng, Fuquan ; Xin, Yuelong ; Huang, Youyuan ; Chen, Jitao ; Zhou, Henghui ; Zhang, Xinxiang
刊名	电源杂志
	2013
关键词	Lithium ion batteries Spinel cathode oxides Lithium aluminate coating Surface modification LI-ION BATTERIES SOL-GEL METHOD LINI0.5MN1.5O4 SPINEL ORDERED LINI0.5MN1.5O4 RATE CAPABILITY ELECTRODE LIMN1.5NI0.5O4 TEMPERATURES INTERFACE CELLS
DOI	10.1016/j.jpowsour.2013.03.143
英文摘要	LiAlO2-surface modified LiMn1.58Ni0.42O4 spinel cathode materials have been prepared by coating Al2O3 on Mn0.79Ni0.21CO3 precursors, followed by post-sintering with Li2CO3 at 900 degrees C. X-ray diffraction and FTIR analyses indicate that during the calcination process aluminum ions not only react with Li2CO3 to form a strengthened LiAlO2 coating layer but also migrate from the surface into the spherical particles. The LiAlO2-surface modified LiMn1.58Ni0.42O4 samples exhibit excellent electrochemical performance compared to that of the bare one in terms of rate capability and cyclability. In particular, the 1 mol.% LiAlO2-surface modified sample can deliver a discharge capacity of 100.6 m Ah g(-1) even at a high current density of 4 C-rate, while the bare one only has a discharge capacity of 49.5 m Ah g(-1). At 55 degrees C, the 1 mol.% LiAlO2-surface modified LiMn1.58Ni0.42O4 sample shows outstanding cyclability with less than 5% capacity fade after 150 cycles. Based on these results, coating on the precursors to prepare a strengthened LiAlO2 coating layer would be a promising method to enhance the electrochemical performance of 5 V spinel cathode materials. (C) 2013 Elsevier B.V. All rights reserved.; Electrochemistry; Energy & Fuels; SCI(E); EI; 12; ARTICLE; 181-188; 239
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150723]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Cheng, Fuquan,Xin, Yuelong,Huang, Youyuan,et al. Enhanced electrochemical performances of 5 V spinel LiMn1.58Ni0.42O4 cathode materials by coating with LiAlO2[J]. 电源杂志,2013.
APA	Cheng, Fuquan,Xin, Yuelong,Huang, Youyuan,Chen, Jitao,Zhou, Henghui,&Zhang, Xinxiang.(2013).Enhanced electrochemical performances of 5 V spinel LiMn1.58Ni0.42O4 cathode materials by coating with LiAlO2.电源杂志.
MLA	Cheng, Fuquan,et al."Enhanced electrochemical performances of 5 V spinel LiMn1.58Ni0.42O4 cathode materials by coating with LiAlO2".电源杂志 (2013).