摘要
以酚醛树脂(PF)为炭前驱体,己二酸(DA)为致孔链段,利用聚合物共聚炭化法制备双电层电容器用多孔炭材料.通过红外和热重分析证实己二酸与酚醛树脂发生了化学反应,DA以链段或支链的形式存在于酚醛树脂固化体系中,并在后续炭化过程中热解逸出.氮气吸附分析表明酚醛树脂固化体系中的DA起到了一定的造孔作用,随着DA加入量增加,多孔炭比表面积先增大后减小,当w(PF)/w(DA)=3:1时所得多孔炭的比表面积为550 cm2/g,孔容为0.27 cm3/g.采用直流充放电法、交流阻抗法和循环伏安法测定以上述多孔炭为电极材料的双电层电容器的电化学性能,结果表明:w(PF)/w(DA)=3:1时制得的多孔炭电极在30%KOH电解液中比电容为145 F/g,电流密度增大50倍,比电容保持率达到70%.
Porous carbons used for electric double layer capacitors（EDLCs） were prepared by chemical blending of phenolic resin（PF） and adipic diacid（DA）.Chemical reaction of PF with diacid is manifested by a shift of carbonyl stretching peak of diacid to a higher frequency in FT-IR spectra and a higher decomposition temperature of diacid in TG curves.The influences of the ratio of w（DA） to w（PF） on pore structure,adsorption behavior and capacity per-formance were investigated.The specific surface area and total pore volume increase with the ratio of w（DA） to w（PF） at first and then decrease,reach the maximum at the value of w（PF）/w（DA）,which are 550 cm^2/g and 0.27 cm^3/g,re-spectively.When the porous carbon used for the electrodes of electrochemical double layer capacitor（EDLC）,a satis-fied specific capacitances of 145 F/g in 30 wt% KOH aqueous electrolytes is acquired and the capacitance maintenance achieve 70% while the current density enlarged 50 times.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第8期857-862,共6页
Journal of Inorganic Materials
基金
国家自然科学基金重点项目(50872032)
中央高校基本科研业务费~~
关键词
酚醛树脂
己二酸
聚合物共聚炭化
多孔炭
电化学性能
phenolic resin
adipic diacid
chemical blending
porous carbon
electrochemical performance
