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MnO2 as an environmental benignity material has been of great interest for supercapacitors due to its unique properties leading to improved performances. Herein we describe the effects of different conductive agent to improve the electrochemical properties of MnO2 nanotubes. Three typical conductive additives: carbon black, carbon nanotubes, and graphene are chosen to mix with MnO2 nanotubes in the working electrodes. The specific conductivities of MnO2@carbon black particles electrode, MnO2@carbon nanotubes electrode, and MnO2@graphene electrode at the current density 1 A g -1 are 244.8 F g -1 , 190.2 F g -1 , and 114.1 F g -1 respectively. Furthermore, MnO2@carbon nanotubes electrode possesses an electrochemical capacitance as high as 297.5 F g -1 at the current density 0.5 A g -

Effect of Different Conductive Additives on the Electrochemical Properties of Mesoporous MnO2 Nanotubes