Research and Application of Materials Science

Biomass Straw Based Activated Porous Carbon Materials for High-Performance Supercapacitors

GUANMengdie, ZHANGXinle, WUYingping, SUNQihao, DONGDongqi, ZHANGXiaoling, WANGJie


Biomass straws are often regarding as agricultural waste, usually burned off in rural areas, which results in severe resource waste and air pollution. In this work, biomass-based porous carbon material with a lamellar microstructure is obtained via simple hydrothermal and subsequent KOH activation, the optimum activate process is determined by the proportion of activator. Scanning electron microscopy (SEM) and nitrogen adsorption techniques are conducted to investigate the physical properties of the materials. Cyclic voltammetry and constant current discharge/charge in the three-electrode system and symmetrical double-layer capacitors results indicate the best electrochemical performance of SCA-1.5 electrode material, with a capacity of 250.0 F g-1 at 1.0 A g-1. And notably, high recycling stability at a high cycling rate of 1.0 A g-1 after 18,000 cycles.


straw; biomass carbon; activation; porous lamellar structure; supercapacitor

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