Long cycling life of Li2MnSiO4 lithium battery cathodes under the double protection from carbon coating and graphene network

Abstract

Li₂MnSiO₄ possesses a high theoretical capacity of 332 mA h g⁻¹ as a lithium battery cathode, but it suffered from rapid capacity fading due to the structural instability and manganese dissolution during cycles. Herein, we developed a unique reduced graphene oxide (RGO)@Li₂MnSiO₄@C composite as a cathode material for lithium ion batteries. Under the double protection from RGO and carbon coating, Li₂MnSiO₄ demonstrated outstanding electrochemical performance with a high capacity of 290 mA h g⁻¹ at 0.05 C, and a long cycling life up to 700 cycles at 1 C.