己二酸/酚醛树脂共聚炭化制备多孔炭材料及其电性能研究

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 %.

Preparation of Porous Carbon by Polymer Blending of Phenolic Resin and Adipic Diacid

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 ...