Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (Supp): 46-50.doi: 10.3866/PKU.WHXB2007Supp11

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Discharge Performances of C/LiNi1/3Co1/3Mn1/3O2

WANG Jian; QI Yu-Jun; LI Yong-Wei; QI Lu

  

  1. CITIC Guoan Mengguli New Energy Technology Co. Ltd., Beijing 102200, P. R. China; New Energy Materials and Technology Laboratory, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:1900-01-01 Revised:1900-01-01 Published:2008-01-04
  • Contact: QI Lu E-mail:qilu@pku.edu.cn

Abstract: 18650 type Li ion secondary cells were developed using carbon as anode material and LiNi1/3Co1/3·Mn1/3O2 as cathode material. The discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell was studied through such methods as charge and discharge cycle, hybrid pulse power characterization (HPPC) and area-specific impedance (ASI) test. Study was also performed on the impact of such factors as material particle and morphology, discharge temperature and electrolyte on the discharge performances of the C/LiNi1/3Co1/3Mn1/3O2 cell, especially on its discharge performance under big currents. The results show that the C/LiNi1/3Co1/3Mn1/3O2 cell presents more stable charge/discharge cycles as well as better discharge performance under big currents with smaller original particle of LiNi1/3Co1/3·Mn1/3O2. It is also demonstrated that elevated discharge temperature prominently improves the discharge performance of the C/LiNi1/3Co1/3Mn1/3O2 cell, with its output power density at late discharge period growing by a large margin. Electrolyte with high conductivity also improves the cell’s long-termcycle performance under big discharge currents.

Key words: Lithiumion secondary battery, Cathode material, LiNi1/3Co1/3Mn1/3O2, Discharge performances

MSC2000: 

  • O646