A novel activated mesocarbon microbead(aMCMB)/Mn3O4 composite for electrochemical capacitors in organic electrolyte

A novel activated mesocarbon microbead(aMCMB)/Mn₃O₄ composite is successfully prepared for electrochemical capacitors. The morphology and crystal structure of the composite are investigated by scanning electron microscopy and X-ray diffraction. The electrochemical studies indicate that the aMCMB/Mn₃O₄ composite has ideal capacitive performance in 1.0 mol L⁻¹ LiPF₆(EC + DMC). A maximum specific capacitance of 178 F g⁻¹ is obtained for the composite via galvanostatic charge–discharge at a current density of 330 mA g⁻¹, and the specific capacitance of Mn₃O₄ is estimated to be as high as 445 F g⁻¹. The aMCMB/Mn₃O₄ composite material exhibits ideal capacitive behavior indicating a promising electrode material for electrochemical supercapacitors.