Porous carbons prepared from deoiled asphalt and their electrochemical properties for supercapacitors
Porous carbons prepared from deoiled asphalt and their electrochemical properties for supercapacitors
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脱油沥青制备的多孔碳及其超级电容器电化学性能
DOI：
10.1016/j.matlet.2010.06.007
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发表时间：
2010-09
影响因子：
3
通讯作者：
Kang, Feiyu
中科院分区：
文献类型：
--
作者：
Zhang, Wenfeng;Huang, Zheng-Hong;Guo, Zhen;Li, Can;Kang, Feiyu
以脱油沥青为原料，采用常规NaOH活化法和纳米MgO模板法与NaOH活化法相结合的方法制备多孔炭。在7 M KOH水溶液中评价了用作超级电容器电极材料的电化学性能。NaOH活化法制备的多孔炭具有较多的微孔和较高的比表面积，在50 mAg −1的低充放电电流下，比电容达到235 Fg − 1。对于组合方法，由于其丰富的中孔，所得碳具有较高的电容和在高电流下保持良好的电容，在10Ag-1的电流密度下电容几乎是前者的两倍。
Porous carbon was prepared from deoiled asphalt by conventional NaOH activation process and by the combination of nano-sized MgO template method and NaOH activation process. The electrochemical properties used as supercapacitors electrode material were evaluated in 7M KOH aqueous solution. Porous carbon samples obtained by NaOH activation possessed more micropores and higher specific surface area, resulting in a higher specific capacitance of 235Fg−1at low charge–discharge current of 50mAg−1. For the combination method, the resultant carbons possessed higher capacitance and good capacitance maintaining at high current, with a capacitance of nearly twice as that of the former at current density of 10Ag−1, due to their abundant mesopores.