Hierarchical Activated Mesoporous Phenolic-Resin-Based Carbons for Supercapacitors

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 investi...

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Veröffentlicht in:Chemistry, an Asian journal an Asian journal, 2014-10, Vol.9 (10), p.2789-2797
Hauptverfasser: Wang, Zhao, Zhou, Min, Chen, Hao, Jiang, Jingui, Guan, Shiyou
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Sprache:eng
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Zusammenfassung: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 m2 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 H2SO4 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. Meso soup: Hierarchical activated mesoporous carbons (AMCs) through KOH activation of highly ordered, body‐centered cubic mesoporous phenolic‐resin‐based carbon (C‐FDU‐16), exhibited outstanding electrochemical capacitive performance, including high specific capacitance, excellent rate capability, and good cycling stability, owing to the large effective specific surface area and an optimized micro‐mesoporous structure.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.201402338