ZnO包覆LiNi1/3Co1/3Mn1/3O2的表面结构和电化学性能

CORC > 厦门大学 > 2014年第20卷

	ZnO包覆LiNi1/3Co1/3Mn1/3O2的表面结构和电化学性能; Surface Structure and Electrochemical Performance of ZnO Coated LiNi1/3Co1/3Mn1/3O2
	刘昌位 ; 王宇 ; 郭玉忠 ; 淡露露 ; 王剑华 ; LIU Chang-wei ; WANG Yu ; GUO Yu-zhong ; DAN Lu-lu ; WANG Jian-hua
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract10041.shtml
	2014-02-25
关键词	LiNi1/3Co1/3Mn1/3O2 包覆表面锂离子电池 LiNi1/3Co1/3Mn1/3O2 coating surface lithium ion battery
英文摘要	在LiNi1/3Co1/3Mn1/3O2正极材料表面包覆ZnO，通过X射线衍射（XRD）和光电子能谱（XPS）分析包覆层对正极材料表面状态的改变，并考察了改性后材料的放电容量、首次不可逆容量等电化学性能变化. 结果表明：ZnO主要存在于材料表面并影响着材料表面组成和电化学性质，材料表面镍和锰的含量随着包覆量的增加而增大；400 oC热处理可使过渡金属与锌在材料表面形成复合氧化物，过渡金属的结合能增大；包覆2%（by mass，下同）的ZnO可有效抑制55 oC下充放电时3.6 V附近的不可逆反应，提高了材料的首次库仑效率；包覆2% ZnO的电池材料在55 oC/0.5C的放电比容量和循环寿命最佳.; The surface of LiNi1/3Co1/3Mn1/3O2 particles were modified by ZnO. Surface structure and electrochemical properties of the coated materials were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical tests. The results show that a ZnO coating affects the surface composition of LiNi1/3Co1/3Mn1/3O2 particles. The surface contents of nickel and manganese increase with the amount of ZnO coating. ZnO can react with LiNi1/3Co1/3Mn1/3O2 and a complex oxide is formed during the heat-treatment at above 400 oC. The electrochemical studies suggest that a ZnO coating hinder the electrochemical reactions near 3.6 V for pristine sample. The initial columbic efficiency is significantly enhanced by coating LiNi1/3Co1/3Mn1/3O2 with 2% (by mass) ZnO, which delivers high discharge capacity and shows excellent capacity retention at 55 oC/0.5C.; 昆明理工大学校基金项目（No. KKZ4200730010）资助; 作者联系地址：昆明理工大学材料科学与工程学院，云南昆明 650093; Author's Address: College of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 通讯作者E-mail：wjianna@163.com
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dx.doi.org/10.13208/j.electrochem.121024]
专题	2014年第20卷
推荐引用方式 GB/T 7714	刘昌位,王宇,郭玉忠,等. ZnO包覆LiNi1/3Co1/3Mn1/3O2的表面结构和电化学性能, Surface Structure and Electrochemical Performance of ZnO Coated LiNi1/3Co1/3Mn1/3O2[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract10041.shtml,2014.
APA	刘昌位.,王宇.,郭玉忠.,淡露露.,王剑华.,...&WANG Jian-hua.(2014).ZnO包覆LiNi1/3Co1/3Mn1/3O2的表面结构和电化学性能.http://electrochem.xmu.edu.cn/CN/abstract/abstract10041.shtml.
MLA	刘昌位,et al."ZnO包覆LiNi1/3Co1/3Mn1/3O2的表面结构和电化学性能".http://electrochem.xmu.edu.cn/CN/abstract/abstract10041.shtml (2014).