Carbide derived carbon electrode with natural graphite addition in magnesium electrolyte based cell for supercapacitor enhancements

Herein, we have presented a supercapacitor based on carbide derived carbon (CDC) electrode with natural graphite (NG) addition. The capacitor was analyzed at 22 °C by cyclic voltammetry, galvanostatic charge-discharge and impedance techniques using a 0.5 mol/L of magnesium (II) bis (trifluoro methanesulfonyl) imide (MgTFSI) in ethylene carbonate-propylene carbonate (EC: PC = 1: 1, v/v) as electrolyte. The results conclude that the CDC cell enhancements have been proven by the composite electrode (5%–30% NG to CDC) especially on the cell efficiency and voltage i.e., the CDC cell around 2.5 V limit was improved. An obtainable specific capacitance, real power and energy density are 15 F·g−1, 1.2 kW·kg−1 and 15 Wh·kg−1, respectively.

A carbide derived carbon based 2-electrode supercapacitor properties with natural graphite addition in Mg salt based organic medium was demonstrated here. Efficiency and the CDC cell potential stability were improved by the additive.Figure optionsDownload full-size imageDownload as PowerPoint slide