钛掺杂对LiNi_(0.75)Co_(0.25)O_2结构与性能的影响(英文)

电化学（中英文） ›› 2006, Vol. 12 ›› Issue (3): 243-249.

钛掺杂对LiNi_(0.75)Co_(0.25)O_2结构与性能的影响(英文)

贺慧;程璇;张颖;王淑芬;

厦门大学化学系材料科学与工程系固体表面物理化学国家重点实验室,厦门大学化学系材料科学与工程系固体表面物理化学国家重点实验室,厦门大学化学系材料科学与工程系固体表面物理化学国家重点实验室,厦门大学化学系材料科学与工程系固体表面物理化学国家重点实验室福建厦门361005,福建厦门361005,福建厦门361005,福建厦门361005

收稿日期:2006-08-28 修回日期:2006-08-28 出版日期:2006-08-28 发布日期:2006-08-28

Effect of Ti Doping on the Structure and Performance of LiNi_(0.75)Co_(0.25)O_(2)

HE Hui,CHENG Xuan,ZHANG Ying~

(*),WANG Shu-fen(Department of Chemistry,Department of Materials Science & Engineering,State Key Laboratory for Physical Chemistry of Solid Surfaces,Xiamen University,Xiamen 361005,Fujian,China

Received:2006-08-28 Revised:2006-08-28 Published:2006-08-28 Online:2006-08-28

摘要/Abstract

摘要： 应用溶胶-凝胶法合成LiNi(0.75-x)Co0.25TixO2(x=0,0.1,0.25)系列正极材料,其结构、形貌、粒度、电化学性能由TG、XRD、SEM和电池充放电测试表征研究表明,材料的电化学性能与钛掺杂量密切相关.在钴含量不变的情况下,随着Ti含量(x)的增加,材料由六方层状结构逐渐向立方结构转变,x=0.25时,出现了立方相与六方相共存.根据实验和理论计算结果简要讨论了钛掺杂对正极材料LiNi0.75Co0.25O2结构和电化学性能的影响.

关键词: 锂离子电池, 正极材料, 钛掺杂, 电化学性能

Abstract: In this study,a series of Co-doped compounds with the formula of LiNi_((0.75-x))Co_(0.25)Ti_(x)O_(2)(x=0,(0.1),0.25)was synthesized by using sol-gel method.Their structure,particle size,electrochemical properties were studied by TG,XRD,SEM and electrochemical tests.It was shown that the structure of materials changed from a hexagonal layered structure to a cubic structure as the x value increased.In particular,a mixture of hexagonal and cubic structure was presented at x =0.25.The electrochemical performance of the materials depended strongly on the amount of Ti doping.Possible effects on the structure and performance of LiNi_((0.75-x))Co_(0.25)Ti_(x)O_(2) due to Ti doping are briefly discussed based upon the experiment and computational results.

Key words: Lithium ion batteries, Cathode materials, Ti doping, Electrochemical performance

中图分类号:

TM912.9

贺慧;程璇;张颖;王淑芬;. 钛掺杂对LiNi_(0.75)Co_(0.25)O_2结构与性能的影响(英文)[J]. 电化学（中英文）, 2006, 12(3): 243-249.

HE Hui,CHENG Xuan,ZHANG Ying~. Effect of Ti Doping on the Structure and Performance of LiNi_(0.75)Co_(0.25)O_(2)[J]. Journal of Electrochemistry, 2006, 12(3): 243-249.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2006/V12/I3/243

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