储能科学与技术2016，Vol.5Issue(6)：827-832,6.DOI:10.12028/j.issn.2095-4239.2016.0038
碳气凝胶的制备及其在电化学超级电容器上的应用
Preparation of carbon aerogels and its application in electrochemical supercapacitors
摘要
Abstract
The carbon aerogels are prepared by using resorcinol and formaldehyde as precursor, Na2CO3 as catalyst and water as solvent with sol-gel technology, following drying and carbonization at high temperature. The optimized parameters of the preparation of high specific surface area carbon aerogels in this paper have been investigated by adjusting the ratios of precursors and applying three activated processes: carbon dioxide physical activation process, potassium hydroxide wet chemical activation process, and two steps activation process of carbon dioxide and potassium hydroxide for the application of carbon aerogels in supercapacitors. Moreover the microstructure of carbon aerogels and their corresponding electrochemical properties have been characterized and analyzed. The results indicated that the original specific surface area and specific capacitance of the unactivated carbon aerogel are 820 m2/g and 151 F/g respectively as the molar ratio of resorcinol and sodium carbonate (R/C) is 1500. After the carbon dioxide physical activation process, potassium hydroxide wet chemical activation process, and two steps activation process respectively, their specific surface areas increased to 1589 m2/g, 1480 m2/g and 2119 m2/g and the specific capacitances of the samples reached to 181 F/g, 229 F/g and 259 F/g. By contrast, the two-step activation not only enhance the specific surface area, but also form a hierarchically porous structures of the carbon aerogels, which is advantageous to be applied in the supercapacitors.关键词
碳气凝胶/电化学超级电容器/活化工艺/比表面积Key words
carbon aerogels/electrochemical supercapacitors/activated process/specific surface area分类
信息技术与安全科学引用本文复制引用
吴学玲,张志华,刘冬,关大勇,刘念平,叶玉凤,沈军..碳气凝胶的制备及其在电化学超级电容器上的应用[J].储能科学与技术,2016,5(6):827-832,6.基金项目
上海航天科技创新基金（SAST201469、SAST201272），国家自然科学基金（51072137）项目。 （）
