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Synthesization and electrochemical properties of Ni0.6Co0.2Mn0.2(OH)2 ternary cathodes for lithium batteries in the system of CSTR
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Institute of Traffic and Transportation Engineering,Dalian Maritime University,Dalian

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    Abstract:

    Ni0.6Co0.2Mn0.2(OH)2 as precursor of lithium-ion batteries ternary cathode material was prepared for batch preparation by a hydroxyl co-precipitation method in the system of CSTR (continuous stirred tank reactor). Then, the Ni0.6Co0.2Mn0.2(OH)2 was roasted with Li2CO3 to receive Li[Ni0.6Co0.2Mn0.2]O2 under high temperature in the air. Scanning electron microscope (SEM), X-ray diffraction (XRD) and Transmission electron microscope (TEM) were used to examine the morphology and structure of the obtained Li[Ni0.6Co0.2Mn0.2]O2. The resulting Li[Ni0.6Co0.2Mn0.2]O2 powders have a type of spherical structure composed of secondary particles with a typical α-NaFeO2 lamellar structure. The electrochemical tests indicate that this cathode material have a good electrochemical reversibility and much better cycling stability in the voltage range of 2.8 and 4.3 V. Its initial charge and discharge specific capacity are as high as 206 mAh g-1 and 176 mAh g-1 at 0.2 C, with a capacity retention rate of 85% after 100 cycles.

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[Cui Yongfu, Cui Jinlong, Man Jianzong, Cheng Fupeng, Zhang Pengchao, Li Song, Wen Zhongsheng, Sun Juncai. Synthesization and electrochemical properties of Ni0.6Co0.2Mn0.2(OH)2 ternary cathodes for lithium batteries in the system of CSTR[J]. Rare Metal Materials and Engineering,2019,48(2):587~593.]
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History
  • Received:July 08,2017
  • Revised:October 27,2017
  • Adopted:November 08,2017
  • Online: March 15,2019
  • Published: