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Acta Phys. -Chim. Sin.  2012, Vol. 28 Issue (04): 823-830    DOI: 10.3866/PKU.WHXB201202102
ELECTROCHEMISTRY AND NEW ENERGY     
Preparation and Characterization of xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2 Cathode Materials for Lithium-Ion Batteries
WANG Zhao, WU Feng, SU Yue-Feng, BAO Li-Ying, CHEN Lai, LI Ning, CHEN Shi
National Development Center of Hi-Tech Green Materials, School of Chemical Engineering & Environment, Beijing Institute of Technology, Beijing 100081, P. R. China
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Abstract  The lithium rich cathode materials xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2 (x=0.4, 0.5, 0.6) were successfully synthesized via sol-gel method with calcination in air. The transition metal acetate, lithium acetate, and citric acid were used as raw materials. The as-prepared materials were characterized by X-ray diffraction (XRD), scaning electron microscopy (SEM), and electrochemical tests. The material 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3]O2, which was obtained after calcination at 900 °C for 12 h, exhibited fine microstructures and good electrochemical performance. When cycled at 2.0-4.8 V with a current density of 20 mA·g-1 at room temperature, 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3]O2 delivered a initial discharge specific capacity of 260.0 mAh·g-1, and maintained a capacity of 244.7 mAh·g-1 after 40 cycles (capacity retention 94.12%).

Key wordsLithium-ion battery      Sol-gel      Solid solution      Cathode material      Electrochemical performance     
Received: 17 November 2011      Published: 10 February 2012
MSC2000:  锂离子电池  
  溶胶-凝胶  
  固溶体  
  正极材料  
  电化学性能  
Fund:  

The project was supported by the National Key Basic Research Program of China (973) (2009CB220100), National Natural Science Foundation of China (51102018), and National High-Tech Research and Development Program of China (863) (SQ2010AA1123116001).

Corresponding Authors: SU Yue-Feng     E-mail: suyuefeng@bit.edu.cn
Cite this article:

WANG Zhao, WU Feng, SU Yue-Feng, BAO Li-Ying, CHEN Lai, LI Ning, CHEN Shi. Preparation and Characterization of xLi2MnO3·(1-x)Li[Ni1/3Mn1/3Co1/3]O2 Cathode Materials for Lithium-Ion Batteries. Acta Phys. -Chim. Sin., 2012, 28(04): 823-830.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201202102     OR     http://www.whxb.pku.edu.cn/Y2012/V28/I04/823

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