摘要
以生物质秸秆炭化物为基础炭材料,采用无机酸处理,除去其中的硅酸盐组分,制备超级电容器用活性炭。利用扫描电镜及能谱分析和红外吸收光谱表征了反应前后活性炭的结构及组分变化。利用循环伏安方法考察了活性炭处理前后的电化学性能。结果表明:酸处理可溶去炭材料中的无机组分,处理后活性炭中硅含量明显减少;无机组分的除去有利于炭材料形成更丰富的孔结构,为电解液提供输运通道,导致炭材料比电容加大,循环伏安曲线显示出良好的可逆特性;随着处理时间延长,超级炭材料的比电容逐步加大,最高比电容达426.3F/g,比原样炭提高了50%以上,活性炭循环3 000次后的比电容仍保持97.2%。
An activated carbon material for electrical energy storage was prepared via the treatment of straw-based carbon with acidic solution.The structures and compositions of the treated carbon were characterized by scanning electron microscope-energy dispersive spectrometer and Fourier transform infrared spectrophotometer.The effect of acidic solution treatment on the electrochemical performance of the carbon was investigated by cyclic voltammetry.The results show that the acidic solution treatment causes the dissolution of inorganic substance and the decrease of the silicate content,and the activated carbon exhibits superior electrochemical property. The specific capacitance increases with increasing the treatment time.The cyclic voltammetry curves for the treated carbon shows electrochemical reversibility.The maximum specific capacitance of the treated carbons by an acidic solution is 426.3 F/g, which is increased by 50%,compared to the original carbon.The specific capacitance of the activated carbon is 97.2%after 3 000 cycles.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第4期596-600,共5页
Journal of The Chinese Ceramic Society
基金
安徽省重大科技攻关项目(09010201005)
安徽省教育厅重点科研基金(KJ2010A278)
关键词
活性炭
超级电容器
电极材料
比电容
电能储存
activated carbon
supercapacitor
electrode material
specific capacitance
electrical energy storage
