二次活化净水炭用于超级电容器  

Secondary activation of water purification carbon for supercapacitor

作　　者：张灿[1,2] 张浩[2] 王碧燕[1] 胡晨[3] 

机构地区：[1]北京科技大学化学与生物工程学院,北京100191 [2]防化研究院,北京100191 [3]中国电力科学研究院,北京100192

出　　处：《电池》2015年第4期212-214,共3页Battery Bimonthly

基　　金：国家电网公司科技项目(DG71-13-001);北京市科技新星计划(Z131109000413060)

摘　　要：分别以KOH和NaOH为活化剂对工业净水炭进行二次活化,制备活性炭。采用氮气吸附/脱附等温线,计算比表面积、孔径分布及孔容;通过恒流充放电、循环伏安法研究电化学性能。二次活化后的样品,比表面积达到2 000 m2/g左右。以NaOH为活化剂制备的活性炭以50 m A/g的电流充放电,碱炭比为2.0时,在7 mol/L KOH溶液中0~1.0 V循环,比电容达到224 F/g;碱炭比为3.0时,在有机电解液1 mol/L Et4NBF4/PC中0~2.5 V循环,比电容达到138 F/g。Industrial carbon for water purification was reactivated by using KOH and NaOH as reactivation agent respectively to prepare activated carbon. The specific surface area, pore volumes and pore diameter distributions were investigated by N2 adsorption method;electrochemical performance was studied by galvanostatic charge-discharge and cyclic voltammetry. The specific surface area of reactivated sample was around 2 000 m2/g. When the activated carbon prepared with NaOH as reactivation agent charged- discharged with the current of 50 mA/g,the specific capacitance reached 224 F/g when the mass ratio of alkali and carbon was 2. 0 and cycled in 0 - 1.0 V in 7 mol/L KOH solution;the specific capacitance reached 138 F/g when the mass ratio of alkali and carbon was 3.0 and cycled in 0 - 2. 5 V in non-aqueous electrolyte 1 mol/L Et4NBF＋/PC non-aqueous electrolyte.

关 键 词：活性炭 二次活化 超级电容器 比电容 

分 类 号：TM53[电气工程—电器]