Electrochemical Performance of Symmetric Solid-State Super-capacitors Based on Carbon Xerogel Electrodes and Sol-id-Polymer Electrolytes

For the development and optimization of solid-state symmetrical supercapacitors, herein, we propose using carbon based electrodes and sodium and lithium form Aquivion electrolyte membrane, which serves as the separator and electrolyte. Carbon xerogels, synthesized by microwave-assisted sol-gel methodology, with designed and controlled properties were obtained as electrode materials. Commercial activated carbon (YP-50F, "Kuraray Europe" GmbH) was used as active material for comparison. Notably, the developed solid-state symmetrical supercapacitors provide sufficiently high specific capacitances of 105-110 F g-1 at 0.2 A g-1, along with an energy density of 4.5 Wh kg-1 at 300 W kg-1, and in a voltage window of 0-1.2 V in aqueous environments, also demonstrating excellent cycling stability up to 10,000 charge/discharge cycles. These results can demonstrate the potential applications of carbon xerogel as an active electrode material and cation exchange membrane as the electrolyte in the development of solid-state supercapacitor devices.