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.
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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.
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Keywords:
- lithium ion battery,
- LiMn2O4,
- LiCoO2,
- surface coating
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