High performance bio-supercapacitor electrodes composed of graphitized hemicellulose porous carbon spheres.

ABSTRACT: A template-free and one-step carbonization process was developed for fabricating graphitic porous carbon spheres (GPCSs) on hemicelluloses as the electrode material for supercapacitors. This method is green, low-energy, and less time consuming compared to the conventional two-step process (pore-forming and graphitizing). It uses K₂FeO₄, a mild activating agent that fulfills synchronous activation and graphitization. The GPCSs is regular spherical shape, have high nanoporosity, a large specific surface area (1,250 m2 g^-1), and have a high graphitization degree. A unique structural advantage includes a rich interconnected conductive network for electron transfer that shortens the ion transport distance of the electrolyte. Remarkably, the GPCSs electrode displ

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC9556887 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature