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

We report a simple, easy way using WO₃ to build a conductive protective coating layer on the surface of LiNi_0.8Co_0.1Mn_0.1O₂ cathode. The WO₃ coating layer can block direct contact between the LiNi_0.8Co_0.1Mn_0.1O₂ 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.