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研究论文

锂离子电池正极材料LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2合成及表征

  • 朱先军 ,
  • 陈宏浩 ,
  • 詹晖 ,
  • 杨代菱 ,
  • 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,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,武汉大学化学与分子科学学院 湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072

收稿日期: 2005-02-28

  修回日期: 2005-02-28

  网络出版日期: 2005-02-28

Preparation and Characterization of LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2 as Cathode Materials for Lithium-ion Batteries

  • ZHU Xian-jun ,
  • CHEN Hong-hao ,
  • ZHAN Hui ,
  • YANG Dai-ling ,
  • ZHOU Yun-hong~
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  • (College of Chemical and Molecular Science, Wuhan University, Wuhan 430072, China

Received date: 2005-02-28

  Revised date: 2005-02-28

  Online published: 2005-02-28

摘要

以LiOH·H2O、Ni2O3、Co2O3、TiO2和Mg(OH)2为原料,应用固相反应法合成Co Ti Mg共掺杂的LiNiO2化合物LiNi0. 85Co0. 10 (TiMg)0. 025O2;TG DTA、XRD、SEM和电化学测试表明,该材料首次放电容量达182. 7mAh/g(3. 0~4. 3V, 18mA/g), 10次循环之后,容量还有 175. 5mAh/g,容量保持率为 96. 2%;与未掺杂的LiNiO2相比,该材料显示出良好的循环性能,是一种很有应用前景的锂电池正极材料.

本文引用格式

朱先军 , 陈宏浩 , 詹晖 , 杨代菱 , 周运鸿 . 锂离子电池正极材料LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2合成及表征[J]. 电化学, 2005 , 11(1) : 53 -57 . DOI: 10.61558/2993-074X.1613

Abstract

Cathode material of LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2 were prepared by solid state reaction at 725℃ for 24 h from LiOH·H_2O, Ni_2O_3, Co_2O_3, TiO_2 and Mg(OH)_2 under flowing oxygen, and were characterized by TG-DTA, XRD, SEM and electrochemical tests. Effort to simultaneously doped LiNiO_2 with Co-Ti-Mg has been tried to improve the cathode performance. The results show that co-doping definitely has a large beneficial effect in increasing the capacity (182.7mAh/g of the first discharge capacity for LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2) and cycling behavior (175.5 mAh/g after 10 cycles). This cathode materials can be applied for lithium-ion batteries.

参考文献

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