Electrochemical properties of solid leather wastes based supercapacitor electrodes using H2SO4 electrolyte

•Effect of acid electrolyte towards electrochemical response of solid leather waste derived carbon.•High specific capacitance of 1833 F/g is achieved at scan rate of 1 mV/s in 1 M H2SO4.•Fabricated supercapacitor electrodes with cycle stability over 500 cycles.

Solid leather wastes (SLW) based porous carbons were used as the electrode material for supercapacitors in acid (H2SO4) medium. Electrochemical investigations indicate that samples activated at 900 °C shows a maximum capacitance of 1833 F/g at a scan rate of 1 mV/s in 1 M H2SO4 electrolyte. Moreover, SLW porous carbon electrodes show excellent cycling stability over 500 cycles at a constant current density of 20 A/g. Cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) studies propose porous carbons developed from SLW could be an excellent electrode material for supercapacitors even in strong acid electrolyte medium.

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