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 batteryrncathode material application. The LiCoO_2 cathode ceramic particles were selected as templates to carryrnout the investigation for optimization of Al_2O_3 thin shell coatings. The ceramic core-shell formationrnconditions, such as preparation time, solution concentrations, calcination temperature and shellrnthickness control were studied. The electrical performance of cathodes prepared from these surfacernmodified ceramics was evaluated based on above mentioned condition variation. The results reveal thatrnthe new method is an easily implemented core-shell process with robust process conditions. Thesernmodified cathode materials showed greatly improved discharge capacity, enhanced capacity stabilityrnand improved rate capacity. This technology paves a way for Li ion battery cathode materials forrnelectric vehicle application.