自水解辅助纤维素酶解法制备杨木基多孔碳及其电化学性能的研究

Study on the Preparation of Poplar Wood-based Porous Carbon via Dual Mild Activation Method and Its Electrochemical Performance

关键词:  活化  杨木  电极材料  超级电容器  多孔碳  电化学性能

Key Words:activation  poplar wood  electrode materials  supercapacitor  porous carbon  electrochemical performance

摘要:采用自水解预处理和纤维素酶水解双重温和活化的方法制备杨木基多孔碳，并将其用作超级电容器的电极材料，探讨了自水解预处理辅助纤维素酶水解对杨木基多孔碳电化学性能的影响。结果表明，单纯利用纤维素酶水解只能使杨木基多孔碳在纹孔内产生少量孔隙，限制了酶水解对其电化学性能的提高作用；采用自水解预处理辅助纤维素酶水解处理，当纤维素酶与杨木质量比为0.05∶1时，得到的杨木基多孔碳制备的电极材料在0.1 A/g电流密度下，质量比电容达149.70 F/g；在2 A/g的高电流密度下，循环5000次后的电容保持率仍高达94.0%。

Abstract:Poplar wood-based porous carbon was prepared as supercapacitor electrode material by dual mild activation method of autohydrolysis pretreatment （AP） combined with enzymatic hydrolysis （EH）. The effect of EH assisted by AP on the electrochemical properties of poplar wood-based porous carbon was explored. The results showed that the simple enzymatic hydrolysis could only produce a few pores in the cavity of the pits， which limited the effect on improving the resultant electrochemical performance. When EH was assisted by AP and the mass ratio of cellulase to poplar wood was 0.05∶1， the mass specific capacitance of the poplar wood-based porous carbon could reach 149.70 F/g at a current density of 0.1 A/g. The capacitance retention rate was still as high as 94.0% after 5000 cycles at a high current density of 2 A/g.