• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chinese science bulletin >Synthesis of LiCo_(0.3)Ni_(0.7)O_2 as cathode materials for lithium ion batteries by citric acid-assisted sol-gel method
【24h】

Synthesis of LiCo_(0.3)Ni_(0.7)O_2 as cathode materials for lithium ion batteries by citric acid-assisted sol-gel method

机译：柠檬酸辅助溶胶-凝胶法合成锂离子电池正极材料LiCo_（0.3）Ni_（0.7）O_2

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The synthesis process of LiCo_(0.3)Ni_(0.7)O_2 was investigated by FT-IR, mass spectroscopy, elemental analysis, SEM, BET, TG/DTA and XRD in this paper. The results revealed that lithium and transition metal ions were trapped homogeneously on an atomic scale throughout the precursor. Li_2CO_3, NiO and CoO are the intermediate products obtained after decomposition of the precursor and Li_2CO_3 undergoes direct reactions with NiO and CoO to form LiCo_(0.3)Ni_(0.7)O_2. Moreover, the kinetics of formation of LiCo_(0.3)Ni_(0.7)O_2 by citrate sol-gel method is faster than the case of the conventional solid-state reaction between lithium carbonate and corresponding reactants. The single phase of LiCo_(0.3)Ni_(0.7)O_2 was synthesized at temperature as low as 550℃. The discharge capacity of LiCo_(0.3)Ni_(0.7)O_2 increases from 127 to 185 mAh/g as the calcination temperature increasing from 550 to 750℃. After 100 cycles, the discharge capacity of the sample calcined at 750℃ is 155 mAh/g. The electrochemical study shows that the LiCo_(0.3)Ni_(0.7)O_2 has high discharge capacity and good cycling behavior for lithium ion batteries.
机译：通过FT-IR，质谱，元素分析，SEM，BET，TG / DTA和XRD对LiCo_（0.3）Ni_（0.7）O_2的合成过程进行了研究。结果表明，锂和过渡金属离子在整个前体中均被原子级均一地捕获。 Li_2CO_3，NiO和CoO是前体分解后获得的中间产物，并且Li_2CO_3与NiO和CoO直接反应形成LiCo_（0.3）Ni_（0.7）O_2。而且，通过柠檬酸盐溶胶-凝胶法形成LiCo_（0.3）Ni_（0.7）O_2的动力学比传统的碳酸锂和相应的反应物固态反应的情况更快。 LiCo_（0.3）Ni_（0.7）O_2的单相是在低至550℃的温度下合成的。随着煅烧温度从550℃升高到750℃，LiCo_（0.3）Ni_（0.7）O_2的放电容量从127 mAh / g增加到185 mAh / g。 100次循环后，在750℃煅烧的样品的放电容量为155mAh / g。电化学研究表明，LiCo_（0.3）Ni_（0.7）O_2对锂离子电池具有高放电容量和良好的循环性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号