Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (10): 1855-1860.doi: 10.3866/PKU.WHXB201407151

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Fabrication and Electrochemical Behavior of a Pure-Phase Li2MnO3 Thin Film for Cathode Material of Li-Ion Batteries

ZHENG Jie-Yun, WANG Rui, LI Hong   

  1. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2014-03-17 Revised:2014-07-14 Published:2014-09-30
  • Contact: LI Hong E-mail:hli@iphy.ac.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2012CB932900) and "Strategic Priority Research Program" of Chinese Academy of Sciences (XDA09010101).

Abstract:

Li2MnO3 materials were synthesized by solid state reactions. A series of Li2MnO3 thin films were fabricated at different temperatures under O2 by pulsed laser deposition (PLD) using a home-made Li2MnO3 target. The structure and morphology of the as- prepared Li2MnO3 thin films were characterized by X- ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). Their electrochemical performance was also investigated. The results show that the crystallinity of the thin films increased with an increase in deposition temperature, and the thin film electrode prepared at lower than 25 ℃ did not work well. The highest electrochemical activity was achieved by the thin film deposited at 400 ℃, and this result is consistent with our previous report on powder materials. The Li2MnO3 thin film electrodes deposited at 400 and 600 ℃ exhibited lower discharge voltage decay upon cycling compared with the powder electrode.

Key words: Li2MnO3 thin film, Cathode material, Pulsed laser deposition, Potential decay, Li-ion battery

MSC2000: 

  • O646