High-surface-area and high-nitrogen-content carbon microspheres prepared by a pre-oxidation and mild {KOH} activation for superior supercapacitor
By Ma, Cheng; Chen, Xueyong; Long, Donghui; Wang, Jitong; Qiao, Wenming; Ling, Licheng
Published in Carbon
NULL
2017
Abstract
Abstract {KOH} activation is a well-accepted approach to develop microporosity for porous carbons, but its severe etching reactions could inevitably destroy the structural integrity and diminish the heteroatomic surface chemistry of the resultant carbons. Herein, we report a method to prepare well-defined micro-spherical, high-surface-area and high-nitrogen-doping carbons via a mild {KOH} activation. The key to our synthesis relies in the pre-oxidation of the nitrogen-rich polymeric microspheres from resorcinol, formaldehyde and melamine, which could enrich nitrogen heteroatoms into the resultant carbonized framework, resulting in the carbon easily activated by {KOH} with low surface etching and high residual of nitrogen heteroatoms. The obtained carbons possess high specific surface area of 2234
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