“…microcube, microsphere) mainly express unsatisfactory lithium storage capabilities due to their bad electronic conductivities or structural stabilities. Thus, conductive additives such as carbon nanotube (CN), conductive polymer and graphene are widely incorporated to improve the electronic conductivity of MCO 3 [9,10,13,30,31]. The resulted composites of MnCO 3 /CNs, CoCO 3 /polypyrrole and CoCO 3 /graphene exhibited a satisfactory retention capacity of~647 (100th, 100 mA g À1 ), 1070 (100th, 100 mA g À1 ) and 930 mAh g À1 (40th, 50 mA g À1 ), respectively [9,10,13].…”