生物炭应用于超级电容器电极的研究进展

Recent Advances in Biochar Applied to Supercapacitor Electrode

生物质资源储量丰富,可通过热化学等方法转化制备性能优良的生物炭。生物炭材料具有较大的比表面积、较高的孔隙率、丰富多样的孔道结构以及优良的导电率,将其作为超级电容器电极材料有利于提高双电层超级电容器的电化学性能,应用前景良好。通过介绍两种超级电容器工作原理,总结了生物炭作为电极材料的制备和改性方法,论述了生物炭的比表面积、孔道结构和表面官能团对双电层超级电容器电化学性能的影响,综述了近几年生物炭的制备方法和改性工艺对炭材料电极的电化学性能影响。可为生物炭材料在储能领域应用发展提供参考。

Biomass resource is abundant,and can be converted to biochar with outstanding properties through thermochemical methods.With advantages of large specific surface area,high porosity,rich and varied pore structure,and excellent conductivity,biochar material can be used as the supercapacitor electrode.As an electrode material of supercapacitor,it is favorable to improve the electrochemical performance of the double-layer supercapacitor,and has a good application prospect.Based on the introduction of the working principle of two kinds of supercapacitors,the preparation and modification methods of biochar that used as electrode materials were summarized in this paper.Furthermore,the effects of specific surface area,pore structure and surface functional groups of biochar on the electrochemical performance of double-layer supercapacitors were reviewed.The effects of preparation methods and modification techniques of biochar on the electrochemical performance of carbon electrodes in recent years were also reviewed.This review may shed some light on the application and development of biochar in the field of energy storage.