首页|Carbohydrate assisted preparation of N-doped hierarchically porous carbons from melamine resin via high internal phase emulsion template
Carbohydrate assisted preparation of N-doped hierarchically porous carbons from melamine resin via high internal phase emulsion template
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Facile preparation of N-doped hierarchically porous carbons(NHPCs)is an important research direction in high-performance supercapacitors(SCs).In this paper,we report a high internal phase emulsion(HIPE)template method to prepare NHPCs from melamine resins with the aid of sucrose or glucose,referred as S-NHPCs or G-NHPCs,respectively.Sucrose or glucose,formaldehyde,and melamine are dissolved in water as the continuous phase of the HIPE.Under acid catalysis,the continuous phase is cross-linked through aldimine condensation to produce porous melamine resins.Meanwhile,carbohydrate is incorporated via the interaction between the rich oxygen-containing functional groups(-OH,-C=OH)of carbohydrate and the-NH2 groups of melamine through hydrogen bonding and acetal reaction.After carbonization and activation,S-NHPCs or G-NHPCs with high specific surface areas(SSA)are obtained respectively.Besides regulating the porous morphology,biomass carbohydrate can enhance the electrochemical properties of NHPCs via increasing the SSA and hydrophilicity of NHPCs.The SSA of S-NHPC and G-NHPC increased notably from 823 to 1682 m~2 g"1 and 1913 m~2 g"1,respectively.Meanwhile,owing to the comprehensive N-doping and the developed porous structure,the prepared NHPC based electrodes exhibit excellent specific capacitances(up to 305 F g~(-1)at 1 A g~(-1)),satisfactory cycling stability,and remarkable rate performance in a three-electrode system.
High internal phase emulsionMelamine resinN-doped hierarchical porous carbonSupercapacitorCarbohydrate
Yulai Zhao、Anjun Wang、Lianzhi Shen
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Department of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Fuzhou University,Fuzhou,350116,China
College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China
NSTL
