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Engineering the Morphology of Carbon Materials: 2D Porous Carbon Nanosheets for High‐Performance Supercapacitors
Author(s) -
Yuan Kai,
Hu Ting,
Xu Yazhou,
Graf Robert,
Brunklaus Gunther,
Forster Michael,
Chen Yiwang,
Scherf Ullrich
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500516
Subject(s) - supercapacitor , graphene , materials science , carbon fibers , nanotechnology , specific surface area , pyrolysis , porosity , capacitance , chemical engineering , electrode , microporous material , composite material , composite number , chemistry , organic chemistry , catalysis , engineering
Compared with traditional porous carbon materials, two‐dimensional (2D) porous carbon materials with a high aspect ratio and a continuous hierarchical porous structure are promising candidates for the construction of supercapacitor electrode materials. Herein, well‐defined, graphene‐based conjugated microporous polymer sheets (G‐CMPs) were prepared in a graphene‐inspired synthetic strategy. Thereby, 4‐iodophenyl‐substituted graphene (RGO‐I) templates not only effectively hinder the aggregation between the adjacent graphene layers but also provide an efficient template for the growth of porous CMPs onto the graphene surface. Moreover, our G‐CMPs could be converted into 2D porous carbon nanosheets by pyrolysis. The synergism of high aspect ratio and high specific surface area, the presence of graphene‐based conduction paths and hierarchical pore systems ensure a high ion‐accessible surface area of the corresponding supercapacitor electrodes thus allowing accelerated electron and ion diffusion/transport and leading to high specific capacitance as well as good rate capability and cycling stability.