High-capacity porous carbons prepared by KOH activation of activated carbon for supercapacitors  

作　　者：Yong Xiao Chao Long Ming-Tao Zheng Han-Wu Dong Bing-Fu Lei Hao-Ran Zhang Ying-Liang Liu 

机构地区：[1]Department of Applied Chemistry,South China Agricultural University

出　　处：《Chinese Chemical Letters》2014年第6期865-868,共4页中国化学快报（英文版）

基　　金：supported by the National Science Foundation of China(Nos.21371061,21031001);the Science and Technology Plan Projects of Guangdong Province(No.2011A081301018);the Key Academic Program of the 3rd phase "211 Project" of South China Agricultural University

摘　　要：High-performance supercapacitor electrode materials are prepared from the commercially available activated carbon （AC） through a facile and low-cost chemical activation method. The obtained results show that AC activated by KOH with an alkali/carbon ratio of 6/1 （ACK6） possesses a specific surface area of 3405 m^2/g, a large pore volume of 2.01 cm^3/g, and exhibits the highest initial specific capacitance of 335 F/g at the current density of 0.5 A/g in 6 mol/L KOH, and 85% coloumbic efficiency for 5000 cycles at 20 mV/s.High-performance supercapacitor electrode materials are prepared from the commercially available activated carbon （AC） through a facile and low-cost chemical activation method. The obtained results show that AC activated by KOH with an alkali/carbon ratio of 6/1 （ACK6） possesses a specific surface area of 3405 m^2/g, a large pore volume of 2.01 cm^3/g, and exhibits the highest initial specific capacitance of 335 F/g at the current density of 0.5 A/g in 6 mol/L KOH, and 85% coloumbic efficiency for 5000 cycles at 20 mV/s.

关 键 词：Carbon materials Amorphous materials Electrical properties 

分 类 号：TM53[电气工程—电器] O613.71[理学—无机化学]