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研究论文

掺锶尖晶石相-LiSr_xMn_(2-x)O_4的合成和电化学性能研究

  • 詹晖 ,
  • 周运鸿
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  • 武汉大学化学与分子科学学院,武汉大学化学与分子科学学院 湖北,武汉430072 ,湖北,武汉430072

收稿日期: 2002-05-28

  修回日期: 2002-05-28

  网络出版日期: 2002-05-28

An Investigation on Sr-doped Spinel Phase-LiSr xMn _(2-x ) O _4

  • ZHAN Hui ,
  • ZHOU Yun_hong
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  • (College of chemistry & molecule Science, Wuhan University,Wuhan 430072,China

Received date: 2002-05-28

  Revised date: 2002-05-28

  Online published: 2002-05-28

摘要

采用固相合成方法制备掺锶尖晶石型锂锰氧化物 ,通过X射线衍射法对材料的结构进行了表征 .结果表明 ,当掺入的锶含量较低时 ,得到的产物具有尖晶石结构特征 ,并表现出极佳的电化学性能 ,材料在充放电循环 90周次后仍能保持 95%的容量

本文引用格式

詹晖 , 周运鸿 . 掺锶尖晶石相-LiSr_xMn_(2-x)O_4的合成和电化学性能研究[J]. 电化学, 2002 , 8(2) : 165 -171 . DOI: 10.61558/2993-074X.1453

Abstract

Sr_doped spinel phase_LiSrxMn 2-x O4 was successfully prepared by solid_state method. Structural and electrochemical characterizations were carried out. Although Sr 2+ has a large ion radius_1.12 ,the spinel structure can be well maintained for LiSrxMn 2-x O4 sample as far as the x value doesn't surpass 0.05. Electrochemical study presents supporting evidence that doping the stoichiometric LiSrxMn 2-x O4 phase with Sr is an effective way to improve the cycleability of LiSrxMn 2-x O4 spinel material. A remarkable enhancement of the cycleability with retention of the initial capacity >90 % after 95 cycles was observed for the Sr_doped spinel.

参考文献

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