Niobium Nitride Nb4N5 as a New High-Performance Electrode Material for   Supercapacitors

doi:10.1002/advs.201500126

CORC > 北京大学 > 化学与分子工程学院

	Niobium Nitride Nb4N5 as a New High-Performance Electrode Material for Supercapacitors
	Cui, Houlei ; Zhu, Guilian ; Liu, Xiangye ; Liu, Fengxin ; Xie, Yian ; Yang, Chongyin ; Lin, Tianquan ; Gu, Hui ; Huang, Fuqiang
刊名	ADVANCED SCIENCE
	2015
关键词	TRANSITION-METAL NITRIDES THIN-FILM SUPERCAPACITORS TIO2 NANOTUBE ARRAYS ELECTROCHEMICAL CAPACITORS TITANIUM NITRIDE CARBON NANOTUBES SURFACE-COMPOSITION HALIDE APPROACH ENERGY-STORAGE ANODIZATION
DOI	10.1002/advs.201500126
英文摘要	Supercapacitors suffer either from low capacitance for carbon or derivate electrodes or from poor electrical conductivity and electrochemical stability for metal oxide or conducting polymer electrodes. Transition metal nitrides possess fair electrical conductivity but superior chemical stability, which may be desirable candidates for supercapacitors. Herein, niobium nitride, Nb4N5, is explored to be an excellent capacitive material for the first time. An areal capacitance of 225.8 mF cm(-2), with a reasonable rate capability (60.8% retention from 0.5 to 10 mA cm(-2)) and cycling stability (70.9% retention after 2000 cycles), is achieved in Nb4N5 nanochannels electrode with prominent electrical conductivity and electrochemical activity. Faradaic pseudocapacitance is confirmed by the mechanistic studies, deriving from the proton incorporation/chemisorption reaction owing to the copious +5 valence Nb ions in Nb4N5. Moreover, this Nb4N5 nanochannels electrode with an ultrathin carbon coating exhibits nearly 100% capacitance retention after 2000 CV cycles, which is an excellent cycling stability for metal nitride materials. Thus, the Nb4N5 nanochannels are qualified for a candidate for supercapacitors and other energy storage applications.; NSF of China [91122034, 51125006, 61376056, 51402336]; Science and Technology Commission of Shanghai [13JC1405700, 14YF1406500]; SCI(E); ARTICLE; huangfq@mail.sic.ac.cn; 12; 2
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/439116]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Cui, Houlei,Zhu, Guilian,Liu, Xiangye,et al. Niobium Nitride Nb4N5 as a New High-Performance Electrode Material for Supercapacitors[J]. ADVANCED SCIENCE,2015.
APA	Cui, Houlei.,Zhu, Guilian.,Liu, Xiangye.,Liu, Fengxin.,Xie, Yian.,...&Huang, Fuqiang.(2015).Niobium Nitride Nb4N5 as a New High-Performance Electrode Material for Supercapacitors.ADVANCED SCIENCE.
MLA	Cui, Houlei,et al."Niobium Nitride Nb4N5 as a New High-Performance Electrode Material for Supercapacitors".ADVANCED SCIENCE (2015).