Abstract
AbstractTernary layered LiNi0.5Co0.2Mn0.3O2 microspheres are functionally surface‐modified with a fast‐Li+‐conductive Li2ZrO3‐based shell through a facile synthetic strategy based on an infiltrative pre‐coating treatment combined with a single‐step post‐sintering process. Owing to the complete nanoscale Li2ZrO3 shell coating, which has a 3D diffusion path for Li+, the resultant coated LiNi0.5Co0.2Mn0.3O2 microspheres manifest remarkably enhanced rate capability and cycling performance as cathode materials both at room and elevated temperature when tested in a half Li‐ion battery cell. Moreover, the combination of the coated LiNi0.5Co0.2Mn0.3O2 cathode and a commercial graphite anode into a full cell not only delivers a remarkable specific capacity of 140 mAh g−1 under 1 C, but also exhibits an excellent capacity retention of 78 % with a high coulombic efficiency of over 99.5 % after 100 cycles, which demonstrates its application as a promising electrochemical device for energy storage and conversion.
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