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An Eco‐Friendly Nitrogen Source for the Preparation of Vanadium Nitride/Nitrogen‐Doped Carbon Nanocomposites for Supercapacitors
Author(s) -
Jiang Xin,
Lu Wei,
Li Yunfeng,
Yu Yang,
Zhou Xuanbo,
Liu Xianchun,
Xing Yan
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900700
Subject(s) - supercapacitor , vanadium , materials science , nanocomposite , environmentally friendly , nitrogen , vanadium nitride , carbon fibers , doping , nitride , nanotechnology , chemical engineering , composite material , metallurgy , chemistry , composite number , capacitance , organic chemistry , electrode , optoelectronics , layer (electronics) , biology , engineering , ecology
It is highly urgent to find an eco‐friendly nitrogen source for the preparation of metal nitrides as an electrode material for supercapacitors (SCs). Herein, vanadium nitride/N‐doped carbon (VN/NC) nanocomposites were prepared from the nitrogen source of g‐C 3 N 4 by a facile one‐step annealing process. VN NPs, with an average particle size of 7 nm, make an important contribution to the capacitance of the composites. N‐doped carbon (NC), with an advanced sheet‐like structure and high nitrogen content provides a large surface area and effective electrolyte penetration, leading to more exposed VN active sites and a good electrical conductivity. As a supporting substrate, NC nanosheets (NCS) prevent VN NPs from aggregation, thereby a favorable cycling stability of the composite electrode was achieved. In addition, as the (−) 0.04‐VN/NCS2//NiCo 2 S 4 (+) asymmetric device is assembled, favorable specific capacitance, high energy, and power density can also be obtained.