用于超级电容器的木质纤维素基碳材料的制备及其性能研究

Preparation and Performance of Lignocellulose Based Carbon Material for Supercapacitor

关键词:  木质纤维素  活化  碳材料  超级电容器  电化学性能

Key Words:lignocellulose  activation  carbon material  supercapacitor  electrochemical performance

摘要:本研究以KOH为活化剂，采用先预碳化再活化和先活化再碳化的2种不同工艺处理方法，制备了不同结构的木质纤维素基碳材料。前一种方法合成的多孔碳材料缺陷丰富、比表面积高达1737 m²/g。受益于其特殊的构效关系，该多孔碳材料作为超级电容器的电极表现出了优异的电化学性能，在0.5 A/g的电流密度下，其比容量达到194 F/g。

Abstract:In this study， potassium hydroxide （KOH） was used as activator to prepare lignocellulose-based carbon materials with different structures via two different processing methods. One was first pre-carbonization and then activation， and the other was first activation and then carbonization. The porous carbon material synthesized by the former method was rich in defects and the specific surface area reached 1737 m²/g. Due to its special structure-activity relationship， the obtained porous carbon material as a supercapacitor electrode exhibited excellent electrochemical performance with a specific capacity of 194 F/g at a current density of 0.5 A/g.