LiMn2O4-coated LiCoO2 film was synthesized by the ESD technique. The bulk structure and its electrochemical property were studied by X-ray diffraction (XRD) and cyclic voltammetry (CV) and the surface structure were characterized using soft XAS at the O K-edge and the Mn L-edge. The bulk structure and the electrochemical property of the LiMn2O4-coated LiCoO2 film do not show substantial difference compared to the bare LiCoO2 film. The thermal stability of LiCoO2 film is improved by LiMn2O4 coating on the surface of the LiCoO2 film. The Mn L-edge and O K-edge results suggest that the structure at the surface of LiMn2O4-coated LiCoO2 film is a spinel LiCoxMn2-xO4.
Bibliographical noteFunding Information:
The work done at BNL was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies of the U.S. Department of Energy under Contract Number DE-AC02-98CH10886. The work done at Yonsei University was supported by the Korea Science and Engineering Foundation (KOSEF) through the Research Center for Energy Conversion and Storage (RCECS), (No. 2000-2-30100-012-3) and by the Ministry of Information and Communication of Korea [Support Project of University Information Technology Research Center, supervised by the Institute of Information Technology Assessment (IITA)].
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering