摘要
以废弃中密度纤维板为原料，通过K2CO3活化制备活性炭双电层电容器电极。探讨炭化温度（500oC）、碱炭比（K2CO3与炭化物的不同质量比，即2．5、3、3．5和4）、活化温度（800℃）和活化时间（1h）对电极电化学性能的影响，并对活性炭进行表面化学结构、孔隙性质和电化学性能进行表征。结果表明，经炭化和活化作用，所得活性炭均含有氮元素，含氮质量分数为0．93％-2．86％。在不同质量活化剂K2C03的作用下，所得活性炭BET比表面积分别为569～1027m2／g，不同比表面积活性炭作电极经测试得到不同质量比电容，所得比电容为147—223F／g。另外，当碱炭比为3．5时，所得活性炭电极的质量比电容和电化学性能最佳，归因于此条件下所制活性炭具有高比表面积和大的孔隙，并含有含氮官能团。
N-doped activated carbons for electric double-layer capacitors were prepared from waste medium density fiberboard u- sing K2CO3 activation. The effects of carbonization temperature, activation temperature, activation time and K2CO3/coke mass rati- os on surface chemical compositions, pore structure and electrochemical performance of the resulting activated carbons were investi- gated. Results indicated that the activated carbons had nitrogen contents from 0. 93-2. 86% , Brunauer-Emmett-Teller specific surface areas from 569m2/g to 1 027 m2/g and specific capacitances from 147 F/g to 223 F/g, depending on carbonization and activation conditions. The maximum specific capacitance was attributed to a high surface area, optimum pore size, large pore volume and high N-5 （the pyrrolic nitrogen and pyridinic nitrogen in association with oxygen functionality） content.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2014年第2期89-95,共7页
New Carbon Materials
基金
Scientific research projects of forestry public welfare(201204807)~~
关键词
含氮活性炭电极
双电层电容器
废弃中密度纤维板
N-doped activated carbon electrode
Electric double-layer capacitor
Waste medium density fiberboard
