Ultra-small vanadium nitride quantum dots embedded in porous carbon as high performance electrode materials for capacitive energy storage

doi:10.1016/j.jpowsour.2016.09.151

	Ultra-small vanadium nitride quantum dots embedded in porous carbon as high performance electrode materials for capacitive energy storage
	Yang, Yunlong 1; Zhao, Lei 2; Shen, Kuiwen 1; Liu, Ying 1; Zhao, Xiaoning 1; Wu, Yage 1; Wang, Yanqin 1; Ran, Fen 1
刊名	Journal of Power Sources
	2016-11-30
卷号	333 页码:61-71
关键词	Blending Capacitance Carbon Current density Electrodes Electrolytes Hybrid materials Nanocrystals Nickel compounds Nitrides Porous materials Potassium hydroxide Semiconductor quantum dots Supercapacitor Capacitance retention High specific capacitances Hybrid supercapacitors Nitrogen atmospheres Specific capacitance Thermal treatment process Ultra-high energies Vanadium nitrides
ISSN号	03787753
DOI	10.1016/j.jpowsour.2016.09.151
英文摘要	Ultra-small vanadium nitride quantum dots embedded in porous carbon (VNQDs/PC) were fabricated by a thermal treatment process of NH4VO3/C3H6N6 under nitrogen atmosphere. The specific capacitance of VNQDs/PC was 1008 mF cm−2 at a current density of 0.004 A cm−2, whereas the VN/carbon hybrid material obtained by a solid-state blending of NH4VO3 and C3H6N6 just exhibited a capacitance of 432 mF cm−2 at the same current density. By mediating the ratio of NH4VO3 and C3H6N6, a maximum specific capacitance of 1124 mF cm−2 was achieved at a current density of 0.002 A cm−2 in aqueous 6 mol/L KOH electrolyte with the potential range from 0 to −1.15 V when it reached 1: 7 (wt./wt.). Additionally, symmetrical supercapacitor fabricated with synthesized VNQDs/PC presented a high specific capacitance of 215 mF cm−2 at 0.002 A cm−2 based on the entire cell, and exhibited a high capacitance retention of 86.6% with current density increased to 5 A g−1. The VNQDs/PC negative electrodes were combined with Ni(OH)2 positive electrodes for the fabrication of hybrid supercapacitors. Remarkably, at a power density of 828.7 W kg−1, the device delivered an ultrahigh energy density of 47.2 Wh kg−1. © 2016 Elsevier B.V.
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000386403700009
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113028]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.College of Mechanical Engineering, Longdong University, Qingyang; 745000, China
推荐引用方式 GB/T 7714	Yang, Yunlong,Zhao, Lei,Shen, Kuiwen,et al. Ultra-small vanadium nitride quantum dots embedded in porous carbon as high performance electrode materials for capacitive energy storage[J]. Journal of Power Sources,2016,333:61-71.
APA	Yang, Yunlong.,Zhao, Lei.,Shen, Kuiwen.,Liu, Ying.,Zhao, Xiaoning.,...&Ran, Fen.(2016).Ultra-small vanadium nitride quantum dots embedded in porous carbon as high performance electrode materials for capacitive energy storage.Journal of Power Sources,333,61-71.
MLA	Yang, Yunlong,et al."Ultra-small vanadium nitride quantum dots embedded in porous carbon as high performance electrode materials for capacitive energy storage".Journal of Power Sources 333(2016):61-71.