Efficient and inexpensive MPCVD method to synthesize Co3O4/MoS2 heterogeneous composite materials with high stability for supercapacitors

Large-sized metal oxide particles have the potential to constitute cheap, high-performance, and high-stability supercapacitor electrode materials. Herein, marketable large-sized Co3O4 (~6 μm) as starting raw material, inexpensive Co3O4/MoS2 core–shell heterogeneous composites been one-step fabricated via an improvised MPCVD system modified by a domestic microwave oven. After that, surface morphology, composition structure, valence state of elements were analyzed confirmed successful synthesis MoS2 on Co3O4. Besides, performance was tested cyclic voltammetry galvanostatic charge–discharge method. The results show that synergistic effect core shell can effectively improve material's electrochemical performance. specific capacitance composite reach 337 F g−1 with current density 0.5 A g−1, which is six times more than powder. Furthermore, it could maintain 93.6% initial after 2000 charges discharges. Finally, mechanism material improvement proposed.