能源化学(英文) ›› 2013, Vol. 22 ›› Issue (3): 468-476.

• Articles • 上一篇    下一篇

Coating of Al2O3 on layered Li(Mn1/3Ni1/3Co1/3)O2 using CO2 as green precipitant and their improved electrochemical performance for lithium ion batteries

Yingqiang Wua,b,c, Linhai Zhuoa,b, Jun Minga,b, Yancun Yua,b, Fengyu Zhaoa,b   

  1. a. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;
    b. Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;
    c. University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2012-12-03 修回日期:2013-01-15 出版日期:2013-05-20 发布日期:2013-05-31
  • 通讯作者: Linhai Zhuo, Fengyu Zhao
  • 基金资助:

    This work was financial supported by the National Natural Science Foundation of China (21273222).

Coating of Al2O3 on layered Li(Mn1/3Ni1/3Co1/3)O2 using CO2 as green precipitant and their improved electrochemical performance for lithium ion batteries

Yingqiang Wua,b,c, Linhai Zhuoa,b, Jun Minga,b, Yancun Yua,b, Fengyu Zhaoa,b   

  1. a. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;
    b. Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;
    c. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-12-03 Revised:2013-01-15 Online:2013-05-20 Published:2013-05-31
  • Supported by:

    This work was financial supported by the National Natural Science Foundation of China (21273222).

摘要: Li(Mn1/3Ni1/3Co1/3)O2 cathode materials were fabricated by a hydroxide precursor method. Al2O3 was coated on the surface of the Li(Mn1/3Ni1/3Co1/3)O2 through a simple and effective one-step electrostatic self-assembly method. In the coating process, a NaHCO3-H2CO3 buffer was formed spontaneously when CO2 was introduced into the NaAlO2 solution. Compared with bare Li(Mn1/3Ni1/3Co1/3)O2, the surface-modified samples exhibited better cycling performance, rate capability and rate capability retention. The Al2O3-coated Li(Mn1/3Ni1/3Co1/3)O2 electrodes delivered a discharge capacity of about 115 mAh穏-1 at 2 A穏-1, but only 84 mAh穏-1 for the bare one. The capacity retention of the Al2O3-coated Li(Mn1/3Ni1/3Co1/3)O2 was 90.7% after 50 cycles, about 30% higher than that of the pristine one.

关键词: electrochemistry, alumina, coating, layered cathode, lithium-ion batteries

Abstract: Li(Mn1/3Ni1/3Co1/3)O2 cathode materials were fabricated by a hydroxide precursor method. Al2O3 was coated on the surface of the Li(Mn1/3Ni1/3Co1/3)O2 through a simple and effective one-step electrostatic self-assembly method. In the coating process, a NaHCO3-H2CO3 buffer was formed spontaneously when CO2 was introduced into the NaAlO2 solution. Compared with bare Li(Mn1/3Ni1/3Co1/3)O2, the surface-modified samples exhibited better cycling performance, rate capability and rate capability retention. The Al2O3-coated Li(Mn1/3Ni1/3Co1/3)O2 electrodes delivered a discharge capacity of about 115 mAh穏-1 at 2 A穏-1, but only 84 mAh穏-1 for the bare one. The capacity retention of the Al2O3-coated Li(Mn1/3Ni1/3Co1/3)O2 was 90.7% after 50 cycles, about 30% higher than that of the pristine one.

Key words: electrochemistry, alumina, coating, layered cathode, lithium-ion batteries