Figure 6.

a) Picture and schematic of a quasi-solid-state interdigitated device printed on a glass substrate and filled with the gel electrolyte (footprint area ∼1.7 cm²). b) CV curves of the interdigitated PG device at different scan rates (10 to 100 mV s^–1). c) GCD on the interdigitated PG at different currents (3 to 30 mA) and d) capacitance retention of the interdigitated device at an increasing discharge current. The inset in d) shows a Ragone plot for the interdigitated device. e) Cycling test on the interdigitated device at a current of 10 mA (inset shows the first two and last two charge–discharge curves, in green and orange, respectively). f) EIS on the interdigitated device before and after cycling.