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Three‐Dimensional Nitrogen‐Doped Hierarchical Porous Carbon as an Electrode for High‐Performance Supercapacitors
Author(s) -
Tang Jing,
Wang Tao,
Salunkhe Rahul R.,
Alshehri Saad M.,
Malgras Victor,
Yamauchi Yusuke
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503590
Subject(s) - supercapacitor , pseudocapacitance , materials science , capacitance , carbonization , electrolyte , chemical engineering , specific surface area , electrode , current density , carbon fibers , porosity , nanotechnology , composite material , chemistry , organic chemistry , composite number , catalysis , scanning electron microscope , physics , quantum mechanics , engineering
A facile and sustainable procedure for the synthesis of nitrogen‐doped hierarchical porous carbons with a three‐dimensional interconnected framework (NHPC‐3D) was developed. The strategy, based on a colloidal crystal‐templating method, utilizes nitrogenous dopamine as the precursor due to its unique properties, including self‐polymerization under mild alkaline conditions, coating onto various surfaces, a high carbonization yield, and well‐preserved nitrogen doping after heat treatment. The obtained NHPC‐3D possesses a high surface area of 1056 m 2 g −1 , a large pore volume of 2.56 cm 3 g −1 , and a high nitrogen content of 8.2 wt %. The NHPC‐3D is implemented as the electrode material of a supercapacitor and exhibits a specific capacitance as high as 252 F g −1 at a current density of 2 A g −1 . The device also shows a high capacitance retention of 75.7 % at a higher current density of 20 A g −1 in aqueous electrolyte due to a sufficient surface area for charge accommodation, reversible pseudocapacitance, and minimized ion‐transport resistance, as a result of the advantageous interconnected hierarchical porous texture. These results showcase NHPC‐3D as a promising candidate for electrode materials in supercapacitors.