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研究论文

锂离子电池正极材料Li_2MnSiO_4固体核磁共振谱研究

  • 程琥 ,
  • 刘子庚 ,
  • 李益孝 ,
  • 陈忠 ,
  • 杨勇
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  • 厦门大学物理与机电工程学院物理系;厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系;

收稿日期: 2010-08-28

  修回日期: 2010-08-28

  网络出版日期: 2010-08-28

Solid State NMR Studies of Lithium Manganese Silicate as Positive Electrode Materials for Li-ion Batteries

  • CHENG Hu ,
  • LIU Zi-geng ,
  • LI Yi-xiao ,
  • CHEN Zhong ,
  • YANG Yong
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  • ( 1. School of Physics and Mechanieal & Electrical Engineering,Xiamen University,Xiamen 361005, Fujian,China; 2. State Key Lab for Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China

Received date: 2010-08-28

  Revised date: 2010-08-28

  Online published: 2010-08-28

摘要

应用水热-溶胶凝胶法合成了Li2MnSiO4正极材料.由XRD、FTIR、固体NMR及恒流充放电等方法表征、分析样品的相组成、晶体结构和电化学性能.结果表明,合成的样品主相为Li2MnSiO4,同时存在少量Li2CO3杂质.该材料的首次放电容量可达190mAh·g-1,但在充放电循环过程中由于结构坍塌、分解导致其容量衰退明显.

本文引用格式

程琥 , 刘子庚 , 李益孝 , 陈忠 , 杨勇 . 锂离子电池正极材料Li_2MnSiO_4固体核磁共振谱研究[J]. 电化学, 2010 , 16(3) : 296 -299 . DOI: 10.61558/2993-074X.3358

Abstract

The Li2MnSiO4 cathode material for lithium ion batteries was synthesized by sol-gel assisted hydrothermal method. XRD,FTIR and SS-NMR were used to study the phase,structure and morphology of obtained samples. Electrochemical performance of cathode material was tested. The results show that the main phase of sample prepared was Li2MnSiO4,whereas a small amount of impurities ( Li2CO3) were existed. The Li2MnSiO4 cathode material gave an initial discharging capacity of about 190 mAh·g -1. But this capacity faded rapidly during the cycling process due to the decomposition of Li2MnSiO4.

参考文献

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