Fabrication of a vanadium nitride/N-doped carbon hollow nanosphere composite as an efficient electrode material for asymmetric supercapacitors

被引：31

作者：

Jiang, Xin ^{[1
]}

Lu, Wei ^{[1
]}

Yu, Xiaodan ^{[1
]}

Song, Shuyan ^{[2
]}

Xing, Yan ^{[1
]}

机构：

[1] Northeast Normal Univ, Dept Chem, Jilin Prov Key Lab Adv Energy Mat, Changchun 130024, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130012, Peoples R China

来源：

NANOSCALE ADVANCES | 2020年 / 2卷 / 09期

基金：

中国国家自然科学基金;

关键词：

POROUS STRUCTURES; ENERGY-DENSITY; PERFORMANCE; SURFACE; NANOCOMPOSITES; NANOFIBERS;

D O I：

10.1039/d0na00288g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Low-cost materials and facile processes to obtain novel electrode materials for assembling asymmetric supercapacitors (ASCs) are urgently needed. Herein, a vanadium nitride/nitrogen-doped carbon nanosphere (VN/NCS) composite composed of VN nanoparticles and N-doped carbon (NC) covering the surface of VN has been prepared by the nitridation of a V2O3/C nanocomposite. The hollow VN/NCS composite with a mesoporous structure and the dispersion of VN NPs in N-doped carbon result in a VN/NCS composite with good electrochemical behavior. Moreover, the N-doped carbon layer on the surface of VN effectively inhibits the oxidation of VN during cycling in an alkaline electrolyte. With the VN/NC composite utilized as a novel active electrode material for SCs, good rate capability, specific capacitance, and cycling stability are exhibited. Strikingly, using the VN/NCS composite as a negative electrode and its precursor, the V2O3/C composite, as a positive electrode, an asymmetric supercapacitor (ASC) device, with a good energy density of 19.8 W h kg(-1)at 801 W kg(-1)and a short charging time of 89 s, was assembled.

引用

页码：3865 / 3871

页数：7

共 44 条

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