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富锂正极材料的制备及电化学性能研究

魏欣 张世超 刘冠娆 杨埔蘅 孟娟 李红磊

魏欣, 张世超, 刘冠娆, 等 . 富锂正极材料的制备及电化学性能研究[J]. 北京航空航天大学学报, 2016, 42(8): 1627-1631. doi: 10.13700/j.bh.1001-5965.2015.0505
引用本文: 魏欣, 张世超, 刘冠娆, 等 . 富锂正极材料的制备及电化学性能研究[J]. 北京航空航天大学学报, 2016, 42(8): 1627-1631. doi: 10.13700/j.bh.1001-5965.2015.0505
WEI Xin, ZHANG Shichao, LIU Guanrao, et al. Synthesis and electrochemical performance of lithium-rich cathode material[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(8): 1627-1631. doi: 10.13700/j.bh.1001-5965.2015.0505(in Chinese)
Citation: WEI Xin, ZHANG Shichao, LIU Guanrao, et al. Synthesis and electrochemical performance of lithium-rich cathode material[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(8): 1627-1631. doi: 10.13700/j.bh.1001-5965.2015.0505(in Chinese)

富锂正极材料的制备及电化学性能研究

doi: 10.13700/j.bh.1001-5965.2015.0505
基金项目: 北京航天航空大学博士研究生创新基金(YMF-14-YJSY-004);国家“973”计划(2013CB934001)
详细信息
    作者简介:

    魏欣,女,博士研究生。主要研究方向:锂离子电池正极材料的制备及性能。Tel.:010-82339319。E-mail:xwei2015@buaa.edu.cn;张世超,男,博士,教授,博士生导师。主要研究方向:新能源材料的制备及电化学性能。Tel.:010-82339319。E-mail:csc@buaa.edu.cn

    通讯作者:

    张世超,Tel.:010-82339319,E-mail:csc@buaa.edu.cn

  • 中图分类号: TM911

Synthesis and electrochemical performance of lithium-rich cathode material

  • 摘要: 用溶胶-凝胶法结合高温煅烧过程制备富锂正极材料Li1.2Mn0.54Ni0.13Co0.13O2,对800℃和900℃煅烧后得到的2种材料(标记为S8和S9)进行物相和形貌表征以及电化学测试。电化学测试结果表明,样品S9具有较高的放电容量、较好的循环稳定性和较小的电荷转移电阻。样品S9在0.1 C(25 mA·g-1)时的首次充电容量为345.0 mA·h·g-1,首次放电容量为273.9 mA·h·g-1,首次库伦效率为79.4%。1 C时,首次放电容量为188.1 mA·h·g-1,循环30周后放电容量为173.3 mA·h·g-1,容量保持率为92.1%。结果表明,尽管富锂正极材料R-3m层状结构在800℃煅烧后已经形成,但仍需要经过更高温度煅烧,以提高锂离子和过渡金属离子在各自层中的有序度,从而有效地提高材料的电化学性能。

     

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出版历程
  • 收稿日期:  2015-07-29
  • 刊出日期:  2016-08-20

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