In situ SiO2 etching strategy to prepare rice husk-derived porous carbons for supercapacitor application

Rice husk-derived porous carbon materials were prepared through mixing and pyrolyzing of carbon-silica composites (product of pre-carbonized rice husk) and Polytetrafluoroethylene (PTFE) powders under inert atmosphere. The fabrication process does not use any toxic or corrosive solution to etch the SiO2, which was more suitable for large scale production.151