Highly improved structural stability and electrochemical properties of Ni-rich NCM cathode materials

초록

We report a simple, easy way using WO3 to build a conductive protective coating layer on the surface of LiNi0.8Co0.1Mn0.1O2 cathode. The WO3 coating layer can block direct contact between the LiNi0.8Co0.1Mn0.1O2 and electrolyte, resulting in suppress the transition metal dissolution and interfacial unwanted reaction on the particle surface. Moreover, WO3 coating layer allows for the smooth and rapid lithium and electron kinetics. The WO3 coating improves the electrochemical performance, especially, this way significantly enhances the rate capability of 166.2 mAh g(-1) at 6.0C and cyclability of 85.8% after 100 cycles. Therefore, WO3 coating provides a new breakthrough to improve the structural stability and suppress the resistance for superior electrochemical performances of lithium ion batteries.

키워드