无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (6): 61-.

• 论文 • 上一篇    

锂离子电池正极材料锰酸锂掺杂改性研究

张春丽,叶学海,张晓波,付春明,于晓微,肖彩英   

  1. 中海油天津化工研究设计院,天津300131
  • 发布日期:2012-06-20

Modification of cathode material for lithium ion batteries by doping lithium manganate

ZHANG  Chun-Li, YE  Xue-Hai, ZHANG  Xiao-Bo, FU  Chun-Ming, YU  Xiao-Wei, XIAO  Cai-Ying   

  1. CNOOC Tianjin Chemical Research & Design Institute,Tianjin 300131,China
  • Published:2012-06-20

摘要: 采用固相反应法分别合成正极材料纯相LiMn2O4和LiPrxMn2-xO4(x=0.02、0.04、0.06、0.08、0.10)固溶体。采用扫描电镜(SEM)、X射线衍射(XRD)、恒电流充放电等手段,对合成样品的形貌、结构、电化学性能进行了测试。结果表明:当x=0.06时,固溶体LiPr0.06Mn1.94O4具有良好的尖晶石结构,晶体大小较均匀;固溶体LiPr0.06Mn1.94O4具有良好的高温(55 ℃)循环性能,实验电池在55 ℃、1 C充放电倍率下,循环50次后容量保持率为82.5%。

关键词: LiMn2O4, 离子掺杂, 锂离子电池, 正极材料

Abstract: High purity LiMn2O4  and solid solution LiPrxMn2-xO4(x=0.02,0.04,0.06,0.08,0.10)were synthesized by solid-state reaction.Morphologies,structures,and electrochemical properties of the samples were investigated by SEM,XRD,and constant current charge-discharge analysis.Results showed when x=0.06,solid solution LiPr0.06Mn1.94O4 samples exhibited good spinel phase with even crystal size;solid solution LiPr0.06 Mn1.94O4 had good high temperature (55 ℃) cycling performance and its discharge capacity retained 82.5% after running for 50 cycles at 55 ℃ and 1C charge and discharge rate.

Key words: LiMn2O4, ion doping, lithium ion batteries, cathode materials

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