. SYNTHESIS AND ELECTROCHEMISTRY OF 3D NAXSNO1-X/G (0.3≤x≤0.4) COMPOSITE ELECTRODE FOR SUPERCAPACITOR APPLICATION.

Abstract

Studying the electrochemistry of NaxSnO1-x/G composite (0.3 ≤ x ≤0.4) as an electrode material for supercapacitor application, the reduce graphene oxide (G) was synthesized using an improved modified Hummer’s method and the composites electrode material using hydrothermal reduction method. The electrode NaxSnO1-x (x = 0.4) gives the highest specific capacitance of 103.5 F/g, energy density of 26.4Wh/kg and power density of 205.9 W/kg after one cycle and after 1000 cycles CV test, it gives the highest capacitance efficiency, equivalent to 94.7 % capacitance retention. The electrode NaxSnO1-x (x=0.3) gives the lowest specific capacitance of 102.6 F/g, energy density of 25.5Wh/kg and power density of 152.1 W/kg after one cycle and after 1000 cycles CV test, it gives the lowest capacitance efficiency, equivalent to 93.9 % capacitance retention. This research highlighted the importance of introducing Na doped SnO in the network of the reduce graphene oxide in order to enhance the electrochemistry of the composite electrode for supercapacitor application.