Renewable cold plasma exposed activated carbon-derived eucalyptus leaves (EL) as electrode in fabricating low-cost energy storage devices

The activated carbon made from Eucalyptus leaves was created using an environmentally friendly physical activation process, and it was then subjected with the low temperature plasma to increase its surface area and porosity, as shown by structural and morphological characteristics. The nanoparticles' surface layers are altered by the plasma treatment, improving surface characteristics like wettability, adhesion, and surface area that were investigated using structural, morphological, and electrochemical studies. The air-plasma-treated KOH exhibits a specific capacitance of 1591 F/g for 1.5 mA, which can be utilized to prepare an electrode material for the energy storage application. The electrochemical investigation was conducted for the untreated and air, oxygen-plasma-treated carbon, demonstrating the better specific capacitance for the air plasma treatment, which can be used to prepare an electrode material for the low-cost fabrication of the devices.