Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (5): 905-912.doi: 10.3866/PKU.WHXB201503091

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Electrochemical Performance of Li[Ni1/3Co1/3Mn1/3]O2 Cathode Material for High-Rate Lithium-Ion Batteries

ZHANG Ji-Bin, HUAWei-Bo, ZHENG Zhuo, LIU Wen-Yuan, GUO Xiao-Dong, ZHONG Ben-He   

  1. Phosphorus Resources Comprehensive Utilization & Clean Processing Center of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
  • Received:2014-11-13 Revised:2015-03-09 Published:2015-05-08
  • Contact: GUO Xiao-Dong E-mail:xiaodong2009@scu.edu.cn
  • Supported by:

    The project was supported by the Science and Technology Pillar Program of Sichuan Province, China (2014GZ0077), Sichuan University Funds for Young Scientists, China (2011SCU11081), and Research Fund for the Doctoral Program of Higher Education, the Ministry of Education, China (20120181120103).

Abstract:

A spherical Li[Ni1/3Co1/3Mn1/3]O2 cathode material for lithium-ion batteries was synthesized using a combination of modified carbonate co-precipitation and solid-state methods. The as-prepared material was analyzed using X- ray diffractometry (XRD), scanning electron microscopy (SEM), galvanostatic chargedischarge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results indicate that the material synthesized using this new method has a well-ordered layered structure, α-NaFeO2 [space group: R3m(166)], a spherical morphology, and an average particle size of 157 nm. Electrochemical measurements showed that the material has a good rate capability and long-term cycling performance. At a current density of 0.1C (1.0C=180mA·g-1) in the voltage range 2.7-4.3 V, the initial discharge capacity was 156.4 mAh·g-1 and the coulombic efficiency was 81.9%. At 0.5C, 5C, and 20C, the specific capacities of the material were 136.9, 111.3, and 81.3 mAh·g-1, respectively. After 100 cycles at 1C, the material retained 92.9% of its initial capacity; this is higher than those of materials prepared using conventional carbonate co-precipitation (87.0%).

Key words: Lithium-ion battery, Cathode material, Li[Ni1/3Co1/3Mn1/3]O2, Rate capacity, Modified carbonate co-precipitation

MSC2000: 

  • O646