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Citation: SHU Dong, HE Chun, MENG Yue-Zhong, KIM Kwang-Bum. Preparation of LiCoO₂/LiMn₂O₄ Film Electrode and Its Electrochemical Performance at Elevated Temperature[J]. Chinese Journal of Applied Chemistry, ;2004, 21(7): 678-682. shu

Preparation of LiCoO₂/LiMn₂O₄ Film Electrode and Its Electrochemical Performance at Elevated Temperature

SHU Dong ^a,b,, ,
HE Chun ^b ,
MENG Yue-Zhong ^a ,
KIM Kwang-Bum ^c

1.
a School of Physics Science and Engineering, Sun Yat-sen University, Guangzhou 510275;
2.
b Department of Chemistry, Zhaoqing University, Zhaoqing;
3.
c Department of Metallurgical Engineering, Yonsei University, Seoul, Korea

Corresponding author: SHU Dong,
Received Date: 18 November 2003
Available Online: 20 February 2004
Fund Project:

LiCoO₂/LiMn₂O₄ thin film electrode was prepared by an electrostatic spray deposition (ESD) technique.The XRD results indicated the formation of a single spinel phase in all LiMn₂O₄ films.AES analysis revealed that LiCoO₂/LiMn₂O₄ film prepared by one-step deposition changed to Co-doping LiMn₂O₄ film due to the diffusion of Co,and LiCoO₂ remained on the surface of LiMn₂O₄ in LiCoO₂/LiMn₂O₄ film prepared by multi-step deposition.The electrochemical experiement results showed improved cycling stability of LiCoO₂/LiMn₂O₄ film at 55℃.The LiCoO₂/LiMn₂O₄ film prepared by multi-step deposition exhibited more superior performance at 55℃ than the sample prepared by one-step deposition and improved rate capability.The mechanism of the improvement of the performance of LiMn₂O₄ film by coating with LiCoO₂ was discussed.
- lithium ion battery,
- LiMn₂O₄,
- LiCoO₂,
- surface coating
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Preparation of LiCoO₂/LiMn₂O₄ Film Electrode and Its Electrochemical Performance at Elevated Temperature