Figure 6

Electrochemical measurement of the APSW-KOH4//APSW-KOH4 symmetric cell displaying. (a) CV curves at different scan rates. (b) GCD plots at different specific currents, (c) specific capacitance as a function of specific current, (d) Nyquist plot and (e) capacitance retention against cycle number at 5 A g⁻¹.