Wang Zhao, Zhou Min, Chen Hao, Jiang Jingui, Guan Shiyou
School of Materials Science and Engineering, East China University of Science and Technology, Mei Long Road 130, Shanghai 200237 (P. R. China), Fax: (+86) 21-64251509.
Chem Asian J. 2014 Oct;9(10):2789-97. doi: 10.1002/asia.201402338. Epub 2014 Aug 5.
A series of hierarchical activated mesoporous carbons (AMCs) were prepared by the activation of highly ordered, body-centered cubic mesoporous phenolic-resin-based carbon with KOH. The effect of the KOH/carbon-weight ratio on the textural properties and capacitive performance of the AMCs was investigated in detail. An AMC prepared with a KOH/carbon-weight ratio of 6:1 possessed the largest specific surface area (1118 m(2) g(-1)), with retention of the ordered mesoporous structure, and exhibited the highest specific capacitance of 260 F g(-1) at a current density of 0.1 A g(-1) in 1 M H2 SO4 aqueous electrolyte. This material also showed excellent rate capability (163 F g(-1) retained at 20 A g(-1)) and good long-term electrochemical stability. This superior capacitive performance could be attributed to a large specific surface area and an optimized micro-mesopore structure, which not only increased the effective specific surface area for charge storage but also provided a favorable pathway for efficient ion transport.
通过用KOH活化高度有序的体心立方介孔酚醛树脂基碳，制备了一系列分级活化介孔碳（AMC）。详细研究了KOH/碳重量比对AMC的织构性质和电容性能的影响。用KOH/碳重量比为6:1制备的AMC具有最大的比表面积（1118 m² g⁻¹），保留了有序的介孔结构，并且在1 M H₂SO₄ 水性电解质中，在电流密度为0.1 A g⁻¹ 时表现出最高比电容260 F g⁻¹。该材料还显示出优异的倍率性能（在20 A g⁻¹ 时保留163 F g⁻¹）和良好的长期电化学稳定性。这种优异的电容性能可归因于大的比表面积和优化的微孔-介孔结构，这不仅增加了用于电荷存储的有效比表面积，而且为高效离子传输提供了有利途径。
