Electrochemical performance of carbon derived from cluster fig leaves for symmetric supercapacitor

The activated carbon was derived from cluster fig (Ficus racemosa) leaves using chemical activation treatment and treated at different temperatures. The influence of temperature on the electrochemical and structural properties of the carbon electrodes has been investigated. The structural and morphological characterizations were investigated using XRD, Raman spectroscopy FESEM, and XPS analysis. The specific capacitance of the cluster fig-derived carbon (CLF-C) at 800 °C showed good results, with a specific capacitance of 209.7 F g⁻¹ at 1 A g⁻¹ of current density. The symmetric device performance of cluster-fig-derived activated carbon has a specific capacitance of 71.6 F g⁻¹ with a maximum energy density of 22.3 Wh kg⁻¹ and a power density of 288.4 W kg⁻¹ at a current density of 1 A g⁻¹. The performance of the symmetric supercapacitor device (CLF-C) at 800 °C performance was evaluated by illuminating it with a red light-emitting diode, indicating that CFL-C-based supercapacitors have real-world applications. The cluster fig leaves-derived carbon, a low-cost and sustainable precursor of biomass, shows superior performance for supercapacitor applications.