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Carbonate 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 Mn 0.8 Co 0.2 CO 3 /graphene composite as anode material for lithium ion batteries. The as-prepared Mn 0.8 Co 0.2 CO 3 /graphene composite with a graphene amount of 17.5 wt% exhibits a morphology of cubic particles in graphene without any impurity. Mn 0.8 Co 0.2 CO 3 /graphene delivers high initial charge capacities of 1033 mAh g −1 . And after 120 cycles, charge/discharge capacities of 737/735 mAh g −1 are maintained at 0.2 A g −1 . Even at 2 A g −1 , the composite can still deliver high charge/discharge capacities of 500/501 mAh g −1 . It is promising to obtain carbonate/graphene anode materials rapidly through such ultrafast solvothermal process assisted by microwave for application. [ABSTRACT FROM AUTHOR]