Low-Cost and Nature-Friendly Hierarchical Porous Carbon for Enhanced Capacitive Electrochemical Energy Storage

In this work, for the first time, we managed to derive the hierarchical porous carbon (HPC) at a large scale from the carbonization of franchet groundcherry fruit peels. With the interconnected porous characteristics and high specific surface area, the environmentally friendly HPC demonstrates a favorable specific capacity of 335 F/g. Moreover, the HPC-based symmetrical device demonstrates a superior energy density of 22.3 Wh/kg. This study not only paves an economical and practical way to recycle the franchet groundcherry fruit peels, but also develops an eco-friendly approach to obtain hierarchical porous carbon for enhanced capacitive electrochemical energy storage.