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摘要: 以甲酚为原料,添加适量的间苯二酚,在氢氧化钠催化作用下与甲醛聚合,经溶胶凝胶、溶剂置换、常压干燥和900℃炭化过程可制备纳米多孔材料炭气凝胶。N2吸附测试表明所制备炭气凝胶BET比表面积高于500m2/g,在8nm~20nm范围具有集中的孔径分布,适合于做双电层电容器的电极材料。采用电化学阻抗谱测试电极的电化学行为,结果显示炭气凝胶电极在1mol/L的H2SO4电解液中的教育部留学回国人员科研启动基金,大连理工大学青年教师基金。
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关键词:
- 炭气凝胶,双电层电容器,电化学阻抗谱
Abstract: Carbon aerogel was synthesized via a sol-gel process from the polycondensation of cresol and resorcinol with formaldehyde catalyzed by NaOH, followed by drying at ambient pressure and pyrolysis at 900℃ under inert atmosphere. Results show that this carbon aerogel has a BET surface area higher than 500m2/g and a fairly uniform pore size distribution in the range of 8-20nm. The electrochemical behavior of such a carbon aerogel used as electrode material for an electrical double-layer capacitor was investigated by impedance spectroscopy. It is found that this carbon aerogel exhibits nearly ideal double-layer capacitance characteristics. The volume specific capacitance and the mass specific capacitance in 1mol/L sulfur acid solution can reach as high as 70F/cm3 and 97F/g.-
Key words:
- Carbon aerogels
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