Volume 43 Issue 2
Mar.  2014
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Article Navigation >  Infrared and Laser Engineering  > 2014  >  43(2): 610-614

Wu Si, Liu Mengjiao, Gao Daojiang, Zhao Yan, Lai Xin, Wu Yun, Bi Jian. Quasi-coprecipitation method preparation and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 powders[J]. Infrared and Laser Engineering, 2014, 43(2): 610-614.
Citation: Wu Si, Liu Mengjiao, Gao Daojiang, Zhao Yan, Lai Xin, Wu Yun, Bi Jian. Quasi-coprecipitation method preparation and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 powders[J]. Infrared and Laser Engineering, 2014, 43(2): 610-614.
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Quasi-coprecipitation method preparation and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 powders

  • 1.

    College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China

  • Received Date: 2013-06-05
  • Rev Recd Date: 2013-07-10
  • Publish Date: 2014-02-25
  • (NH4)2CO3 was added into mixed solution contained Li+, Co2+, Ni2+ and Mn2+ ions as a precipitant. The mixing precipitation precursors were prepared by one-step co-precipitation reaction. After being dried and ground, the precursors were sintered under different sintering temperatures(700-1 000 ℃) and different sintering times(6-24 h), and then LiNi1/3Co1/3Mn1/3O2 powders were obtained. The microstructures and electrochemical properties of the as-prepared powders were examined using X-ray diffraction(XRD), scanning electron microscopy(SEM), cyclic voltammetry(CV) and electrochemical impedance. The results show that the obtained LiNi1/3Co1/3Mn1/3O2 powders are pure -NaFeO2 layered structure;the powders are uniform and exhibit excellent discharge specific capacitance and lower impedance. After sintered at 900 ℃ for 12 h, the obtained LiNi1/3Co1/3Mn1/3O2 powder exhibits the optimum electrochemical performance. The specific capacitance of the LiNi1/3Co1/3Mn1/3O2 powders can reach 399.46 Fg-1 within potential range of (0-1.4) V at a scanning rate of 5 mVs-1 in 1 molL-1 Li2SO4 solution. And the powders also have the lowest impedance.
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Quasi-coprecipitation method preparation and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 powders

  • 1. College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610066,China
  • Received Date: 2013-06-05
  • Rev Recd Date: 2013-07-10
  • Publish Date: 2014-02-25

Abstract: (NH4)2CO3 was added into mixed solution contained Li+, Co2+, Ni2+ and Mn2+ ions as a precipitant. The mixing precipitation precursors were prepared by one-step co-precipitation reaction. After being dried and ground, the precursors were sintered under different sintering temperatures(700-1 000 ℃) and different sintering times(6-24 h), and then LiNi1/3Co1/3Mn1/3O2 powders were obtained. The microstructures and electrochemical properties of the as-prepared powders were examined using X-ray diffraction(XRD), scanning electron microscopy(SEM), cyclic voltammetry(CV) and electrochemical impedance. The results show that the obtained LiNi1/3Co1/3Mn1/3O2 powders are pure -NaFeO2 layered structure;the powders are uniform and exhibit excellent discharge specific capacitance and lower impedance. After sintered at 900 ℃ for 12 h, the obtained LiNi1/3Co1/3Mn1/3O2 powder exhibits the optimum electrochemical performance. The specific capacitance of the LiNi1/3Co1/3Mn1/3O2 powders can reach 399.46 Fg-1 within potential range of (0-1.4) V at a scanning rate of 5 mVs-1 in 1 molL-1 Li2SO4 solution. And the powders also have the lowest impedance.

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