Hierarchical porous carbons prepared by an easy one-step carbonization and activation of phenol-formaldehyde resins with high performance for supercapacitors

被引:87
|
作者
Zheng, Zhoujun [2 ]
Gao, Qiuming [1 ,2 ]
机构
[1] Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Grad Sch, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
基金
美国国家科学基金会;
关键词
Hierarchical porous carbon; Phenol-formaldehyde resin; Simple preparation; Supercapacitor; CAPACITANCE;
D O I
10.1016/j.jpowsour.2010.09.010
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hierarchical porous carbons are prepared by an easy one-step process of carbonization and activation derived from phenol-formaldehyde resins, in which potassium hydroxide acts as both the catalyst of polymerization and the activation reagent. The simple one-step preparation saves the cost of carbons and leads to high yield. The porous carbons have high surface with abundant pore structrues. The plenty of micropores and small mesopores increase the capacitance and make the electrolyte ions diffuse fast into the pores. These hierarchical porous carbons show high performance for supercapacitors possessing of the optimized capacitance of 234 Fg(-1) in aqueous electrolyte and 137 Fg(-1) in organic elecrolyte with high capacitive retention.
引用
收藏
页码:1615 / 1619
页数:5
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