LiZrO-Coated Monocrystalline LiAlMnO Particles as Cathode Materials for Lithium-Ion Batteries.

LiZrO-coated and Al-doped micro-sized monocrystalline LiMnO powder is synthesized through solid-state reaction, and the electrochemical performance is investigated as cathode materials for lithium-ion batteries. It is found that LiZrO-coated LiAlMnO delivers a discharge capacity of 110.90 mAhg with 94% capacity retention after 200 cycles at room temperature and a discharge capacity of 104.4 mAhg with a capacity retention of 87.8% after 100 cycles at 55 °C. Moreover, LiZrO-coated LiAlMnO could retain 87.5% of its initial capacity at 5C rate. This superior cycling and rate performance can be greatly contributed to the synergistic effect of Al-doping and LiZrO-coating.