European Journal of Material Sciences

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Structural and electrochemical properties of agxsno1-x/g (0.3≤x≤0.4) composite electrodes.


The electrochemical performance of AgxSnO1-x/G composite (0.3 ≤ x ≤0.4) as an electrode material was investigated for supercapacitor application. The reduce graphene oxide (G) was synthesized using an improved modified Hummer’s method and the composites electrode material was synthesized with a hydrothermal reduction method. The introduction of AgxSnO1-x (0.3   ) material into the network of the reduce graphene oxide enhances the kinetic for both charge transfer and ion transport throughout the composite electrode. The composite was characterized by Raman, SEM and XRD which reveals the morphology and structural properties. The Electrochemical properties were investigated using cyclic voltammetry and electrochemical impedance spectroscopy analysis. The electrode AgxSnO1-x (x = 0.4) gives the specific capacitance of 123.1 F/g, energy density of 30.9 Wh/kg, and power density of 541.1 W/kg after one cycle. After 1000 cycles CV test, it gives the capacitance efficiency of 95.4 % capacitance retention. The composites showed greatly improved cycling stability and demonstrated positive synergistic effect between AgxSnO1-x (0.3   ) material and the reduce graphene oxide as composite electrode to meet the requirement for high energy and power density.

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