Electrochemical stability in cerium-phosphate–coated LiCoO2 thin films

Donggi Ahn, Chunjoong Kim, Joon-Gon Lee, Byoungsoo Kim, Yejun Park, Byoungwoo Park
2007 Journal of Materials Research  
The electrochemical stability of LiCoO 2 thin films was improved by cerium-phosphate coating deposited at room temperature. The cerium-phosphate coating layer also effectively suppressed the increase of charge-transfer resistance during cycling. However, the cycling stability and the initial capacity of the coated LiCoO 2 thin films deteriorated as the annealing temperature increased, different from other metal-phosphate coating. These phenomena were attributed to the interdiffusion between the
more » ... cerium-phosphate coating layer and LiCoO 2 thin film, instead of the nanocrystal formation in the amorphous coating layer.
doi:10.1557/jmr.2007.0092 fatcat:lpemkoff55gwvc2p6l3mak4sdu