关键字：Carbon;Biomass - Capacitance - Carbonization - Electrodes - Metals - Porous materials - Potassium hydroxide - Supercapacitor

摘要：With the shortage of energy and increasing environmental pollution, it is urgent to produce cheap and efficient carbon electrode materials for supercapacitors. It is low-cost to obtain carbon materials with porous structure and large surface area from biomass. The special structure of biomass carbon is beneficial for deposition of nano-functional particles and improvement in supercapacitance. In this work, a simple method was applied to carbonization and activation of alkali-treated wheat flour, and a porous carbon with a three-dimensional network structure was obtained. The porous carbon electrode exhibits a high specific capacitance of 161.4 F g^-1 at the current density of 0.5 A g^-1 in 2 M KOH. Further, Co<inf>3</inf>O<inf>4</inf> supported on porous carbon with excellent supercapacitance was synthesized. The composite demonstrates an enhanced specific capacitance of 232.9 F g^-1 under the conditions above, and an excellent capacitance retention capability (80.35%) after 1000 cycles. The results show that the metal oxide supported on biomass-derived porous carbon has great potential application as electrode materials of supercapacitors.<br/> &copy; The Electrochemical Society.

卷号：86

期号：4

是否译文：否