Ultrafast synthesis of Mn_(0.8)Co_(0.2)CO_3/graphene composite as anode material by microwave solvothermal strategy with enhanced Li storage properties

摘要

Highlights•A microwave solvothermal process is applied to obtain Mn0.8Co0.2CO3/graphene.•The whole synthesis completes within 30min.•High charge/discharge capacities of 737/735mAhg−1are kept after 120 cycles.•Even at 2Ag−1, charge/discharge capacities of 500/501mAhg−1is obtained.AbstractCarbonate is recently studied as anode material for lithium ion battery due to its relatively high capacity compared to relative oxides. In order to improve the time-efficiency of synthesis, an ultrafast solvothermal process assisted with microwave is carried out to obtain well-constructed Mn0.8Co0.2CO3/graphene composite as anode material for lithium ion batteries. The as-prepared Mn0.8Co0.2CO3/graphene composite with a graphene amount of 17.5wt% exhibits a morphology of cubic particles in graphene without any impurity. Mn0.8Co0.2CO3/graphene delivers high initial charge capacities of 1033mAhg−1. And after 120 cycles, charge/discharge capacities of 737/735mAhg−1are maintained at 0.2Ag−1. Even at 2Ag−1, the composite can still deliver high charge/discharge capacities of 500/501mAhg−1. It is promising to obtain carbonate/graphene anode materials rapidly through such ultrafast solvothermal process assisted by microwave for application.