Figure 5

(a) Full cell capacitance per unit total mass of the asymmetric device at different current densities, (b) cycling performance test of the asymmetric device for 6000 cycles at a current density of 6 mA cm−2, (c) EIS of the asymmetric device measured at the open circuit potential in the frequency range of 100 KHz to 10 mHZ & (d) Ragone plot of the asymmetric device.