Nanocomposites based on hierarchical porous carbon fiber@vanadium nitride nanoparticles as supercapacitor electrodes

doi:10.1039/c7dt04432a

	Nanocomposites based on hierarchical porous carbon fiber@vanadium nitride nanoparticles as supercapacitor electrodes
	Ran, Fen 1,2; Wu, Yage 1; Jiang, Minghuan 1; Tan, Yongtao 1; Liu, Ying 1; Kong, Lingbin 1,2; Kang, Long 1,2; Chen, Shaowei 3
刊名	DALTON TRANSACTIONS
	2018-03-28
卷号	47 期号:12 页码:4128-4138
关键词	Ammonia Block copolymers Capacitance Carbon fibers Carbon nanofibers Electrodes Electrolytes Nanoparticles Nickel compounds Nitrides Phase separation Porous materials Potassium hydroxide Supercapacitor
ISSN号	1477-9226
DOI	10.1039/c7dt04432a
英文摘要	In this study, a hybrid electrode material for supercapacitors based on hierarchical porous carbon fiber@vanadium nitride nanoparticles is fabricated using the method of phase-separation mediated by the PAA-b-PAN-b-PAA tri-block copolymer. In the phase-separation procedure, the ionic block copolymer self-assembled on the surface of carbon nanofibers, and is used to adsorb NH4VO3. Thermal treatment at controlled temperatures under an NH3:N-2 atmosphere led to the formation of vanadium nitride nanoparticles that are distributed uniformly on the nanofiber surface. By changing the PAN to PAA-b-PAN-b-PAA ratio in the casting solution, a maximum specific capacitance of 240.5 F g(-1) is achieved at the current density of 0.5 A g(-1) with good rate capability at a capacitance retention of 72.1% at 5.0 A g(-1) in an aqueous electrolyte of 6 mol L-1 KOH within the potential range of -1.10 to 0 V (rN/A = 1.5/1.0). Moreover, an asymmetric supercapacitor is assembled by using the hierarchical porous carbon fiber@vanadium nitride as the negative electrode and Ni(OH)(2) as the positive electrode. Remarkably, at the power density of 400 W kg(-1), the supercapacitor device delivers a better energy density of 39.3 W h kg(-1). It also shows excellent electrochemical stability, and thus might be used as a promising energy-storage device.
资助项目	Natural Science Funds of the Gansu Province[2015GS05123]
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000428087600016
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32736]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Ran, Fen; Chen, Shaowei
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 3.Univ Calif Santa Cruz, Dept Chem & Biochem, 1156 High St, Santa Cruz, CA 95064 USA
推荐引用方式 GB/T 7714	Ran, Fen,Wu, Yage,Jiang, Minghuan,et al. Nanocomposites based on hierarchical porous carbon fiber@vanadium nitride nanoparticles as supercapacitor electrodes[J]. DALTON TRANSACTIONS,2018,47(12):4128-4138.
APA	Ran, Fen.,Wu, Yage.,Jiang, Minghuan.,Tan, Yongtao.,Liu, Ying.,...&Chen, Shaowei.(2018).Nanocomposites based on hierarchical porous carbon fiber@vanadium nitride nanoparticles as supercapacitor electrodes.DALTON TRANSACTIONS,47(12),4128-4138.
MLA	Ran, Fen,et al."Nanocomposites based on hierarchical porous carbon fiber@vanadium nitride nanoparticles as supercapacitor electrodes".DALTON TRANSACTIONS 47.12(2018):4128-4138.