Effect of Lithium Silicate Addition on the Microstructure and Crack Formation of LiNiCoMnO Cathode Particles.

The microstructure of LiNiCoMnO cathode materials was controlled by the addition of lithium silicate, and the influence on the cycle performance and the rate capability was investigated. Si was not included within the lattice, but localized at the grain boundaries of the primary particles and the pores inside the secondary particles. The addition of the lithium silicate greatly decreased the density of the pores between the primary particles and improved the density of the secondary particles.