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

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.