摘要
通过简单的无机盐磷酸氢二铵催化稳定化、炭化及不同碱炭比KOH活化制备了高比表面积的多孔淀粉基炭微球材料。采用电子扫描显微镜(SEM)、高分辨透射电子显微镜(HRTEM)及N2吸脱附测试对实验所制得的炭微球样品的形貌及孔结构进行了分析。结果表明:不同KOH碱炭比制备的多孔淀粉基炭微球材料具有较大的比表面积(﹥2 300 m2/g),且均含有大量的大孔和微孔,在6 mol/L的KOH电解液对称的双电层电容器中多孔淀粉炭材料表现出优异的电化学性能,在100 A/g的大电流密度下,炭微球电极材料具有最大的质量比电容高达248 F/g。
Porous carbon microspheres with a high SBET surface area have been prepared selected porous starch as precursor. The synthetic process composed of ammonium secondary phosphate catalyzed stabilization, carbonization and KOH activation at different mass ratios of KOH/C. The morphologies and pore textures of the resultant nano-carbon microspheres have been measured by SEM, HRTEM and N2 sorption tests. The results shown that the carbon microspheres have a high surface area more than 2300 m2/g contained a large amount of macro- and micropores. Furthermore, these carbon microspheres existed excellent electrochemical performances in a symmetric electrochemical double-layer capacitor with 6 M KOH as electrolyte and a high specific capacitance of 248 F/g was maintained even at a high current density of 100 A/g.
出处
《化学工业与工程》
CAS
2013年第6期56-61,共6页
Chemical Industry and Engineering
关键词
多孔淀粉
炭微球
双电层电容器
porous starch carbon microspheres electrochemical double-layer capacitors
