A Facile Approach of Metal Oxide Shell Formation on Ceramic Particles for Li Ion Battery Cathode Material Application

摘要

This work describes a facile method to prepare metal oxide shells on ceramic particles for Li ion battery cathode material application. The LiCoO_2 cathode ceramic particles were selected as templates to carry out the investigation for optimization of Al_2O_3 thin shell coatings. The ceramic core-shell formation conditions, such as preparation time, solution concentrations, calcination temperature and shell thickness control were studied. The electrical performance of cathodes prepared from these surface modified ceramics was evaluated based on above mentioned condition variation. The results reveal that the new method is an easily implemented core-shell process with robust process conditions. These modified cathode materials showed greatly improved discharge capacity, enhanced capacity stability and improved rate capacity. This technology paves a way for Li ion battery cathode materials for electric vehicle application.