摘要
以液相泡沫为软模板、水溶性酚醛树脂为碳源、异氰酸酯作为固化剂,复合微波活化技术制备出具有分级多孔结构特征的泡沫碳,对其结构和电化学性能进行分析表征。结果表明:微波活化技术可促进泡沫液膜上H_2O分子的快速逸出,于泡沫碳孔壁上形成大量纳米孔,提高比表面积,但未改变其平均孔径;活化后试样的比表面积为378.2m^2/g,其在1A/g电流密度下的比电容达到123.7F/g,相比于未活化试样提升了约94%,并且由于微波活化对试样孔结构的改善而使试样的内阻减小。
Hierarchical porous carbon foam,using liquid foam as soft template and water-soluble phenolic resin as carbon source and isocyanate as curing agent,was fabricated by microwave activation method.The structure and electrochemical properties of the carbon foam were characterized.The results show that the microwave activation technology can improve the rapid evolution of H2O molecules on the liquid foam film to form a large number of nanopores on the carbon foam wall to lead to the increased specific surface area,but do not change the average pore size.The specific surface area of the activated sample is 378.2 m2/g and its specific capacitance at 1 A/g current density is 123.7 F/g,which is about 94%higher than that of the unactived sample.And the internal resistance of the sample is reduced due to the improvement of the pore structure by microwave activation.
作者
辛兆鹏
方伟
赵雷
何漩
陈辉
李薇馨
孙志敏
XIN Zhao-peng,FANG Wei,ZHAO Lei,HE Xuan, CHEN Hui,LI Wei xin,SUN Zhi-min(State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science ＆ Technology,Wuhan 430081 ,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2018年第11期63-70,共8页
Journal of Materials Engineering
基金
湖北省自然科学基金(2017CFB291)
湖北省科技支撑计划(研发与示范类)(2015BCA253)
国家自然科学基金(61604110)
湖北省教育厅科学研究计划指导性项目(B2017014)
关键词
液相泡沫
微波活化
泡沫碳
电化学性能
liquid foam
microwave activation
carbon foam
electrochemical property
