Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries

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	Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries
	Y. K. Fan; J. M. Wang; Z. Tang; W. C. He; J. Q. Zhang
	2007
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	52 期号:11 页码:3870-3875
摘要	LiNi0.5Mn1.5O4 spinels coated with various amounts of fumed silica have been synthesized and investigated as cathode materials for high-voltage lithium-ion batteries at the elevated temperature (55 degrees C). The morphology and structure of the coated LiNi0.5Mn1.5O4 samples were characterized by XRD, TEM and EDX. It was found that the surfaces of the coated LiNi0.5Mn1.5O4 samples are covered with a porous, amorphous, nanostructured SiO2 layer. The results of electrochemical experiments showed that the SiO2-coated LiNi0.5Mn1.5O4 samples display obviously improved capacity retention rate, and the improvement effect enhances with the increase of SiO2 content. The XPS results revealed that the surfaces of the SiO2-coated LiNi0.5W1.5O4 cathode materials have relatively low content of LiF, and this is mainly responsible for their improved electrochemical cycling stability. (c) 2007 Elsevier Ltd. All rights reserved.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese state key lab corros & protect, shenyang 110015, peoples r china.;wang, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;wjm@cmsce.zju.edu.cn
关键词	Lini0.5mn1.5o4 Spinel Surface Modification Fumed Silica Lif Xps Licrymn2-yo4 0-less-than-or-equal-to-y-less-than-or-equal-to-1 Composite Electrolytes Interfacial Stability Elevated-temperatures Lithium Batteries Surface-films Fumed Silica Xps Analysis Spinel Cells
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33518
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. K. Fan,J. M. Wang,Z. Tang,et al. Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries[J]. Electrochimica Acta,2007,52(11):3870-3875.
APA	Y. K. Fan,J. M. Wang,Z. Tang,W. C. He,&J. Q. Zhang.(2007).Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries.Electrochimica Acta,52(11),3870-3875.
MLA	Y. K. Fan,et al."Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries".Electrochimica Acta 52.11(2007):3870-3875.