The extensive application of compost and its integration into the bio-circular economy, which facilitates the effective conversion of bio-waste into compost, presents promising prospects for renewable energy storage. This study investigates the influence of electrolyte on faradaic and non-faradaic charge storage processes in a compost-based symmetrical device. It focuses on compost as an electrode material while assessing different current collectors in aqueous electrolyte solutions 1M KCl. The findings reveal that compost can accommodate both capacitive and non-capacitive charge storage mecha-nisms in a symmetric dual-current collector configuration, akin to the functions of capacitors and batteries. Through electrochemical evaluations—such as cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) profiling, and electrochemical impedance spectroscopy (EIS)—the study provides insights into charge storage efficiency, timing of charge and discharge cycles, specific capacitance, and specific capacity. Results indicate that compost demonstrates su-perior charge storage capabilities across electrolyte solution, with the compost sample having a C/N ratio of 145.44 in a 1M KCl solution achieving performance, marked by a specific capacitance of 18.4 mF/g and a specific capacity of 82.8 mC/g.

Compost, Charge Storage, Non-Faradic, Faradic, Stability