Fig. 10

Electrochemical performance of GP10C in 2 M KOH electrolyte a CV curves at the scan rate of 5, 10, 25, 50, and 100 mVs⁻¹; b GCD curves at the current densities of 0.25, 0.5, 1.0, 2.0, 3.0, 5.0, 7.0, and 10 Ag⁻¹; c cyclic stability performance for GP10C electrode at 2 Ag⁻¹ and inset shows the GCD curves of first and last 5 cycles; and d Nyquist plot for the GP10C and inset shows the EIS performance during 1st, 10,000 and 15,000 cycles