▎ 摘　　要

Electrochemical supercapacitance performance of a ternary nanocomposite composed of mesoporous indium oxide (In2O3) nanocube crystals (size similar to 50 nm) embedded in carbon nano-tubes (CNT) and reduced graphene oxide (RGO) prepared by hydrothermal method is reported. A glassy carbon electrode modified with the In2O3 /CNT/RGO nanocomposite material exhibited excellent electrochemical performance with a large specific capacitance of 1273 F g(-1) at 5 mV s(-1) and 948 F g(-1) at 1 A g(-1). The composite electrode showed excellent cyclic stability without any capacity loss after 5000 charge/discharge cycles. Furthermore, similar to 75% capacitance retention was observed at high scan rate of 200 mV s(-1). These results indicate that the novel mesoporous In2O3 cubes composited with pi-electron rich conductive nanocarbons CNT and RGO would be useful as electrode material for advanced supercapacitors.