Hierarchical functional layers on high-capacity lithium-excess cathodes for superior lithium ion batteries

269The hierarch functional surface modification consisting of nano-sized LiCoO2 shell and sub-nano-sized ZrO2 ALD coating on Li[Li0.2Mn0.54Ni0.13Co0.13]O2 nanoparticles has been demonstrated to improve electrochemical performance of Li-excess layered cathode material. The synergetic effect from ALD oxide coating and core-shell structure results in high reversibility, cycleabilitiy and rate capability of Li-excess layered cathode material for superior lithium ion battery.