A crystalline nickel vanadium oxide@amorphous cobalt boride nanocomposites with enhanced specific capacity for hybrid supercapacitors

doi:10.1016/j.electacta.2021.138086

	A crystalline nickel vanadium oxide@amorphous cobalt boride nanocomposites with enhanced specific capacity for hybrid supercapacitors
	Hou, Jing-Feng 1; Gao, Jian-Fei 1; Kong, Ling-Bin1,2
	2021-05-01
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	377
摘要	The weak electronic conductivity and severe capacity decay are the major impediments that restrict the battery-type nickel-based electrodes with high theoretical capacity. In this report, active sites-rich nickel vanadium oxide@cobalt boride (Ni3V2O8@Co-B) nanocomposites with a particular heterostructure of crystalline core-amorphous shell are synthesized through a convenient and controlled strategy. In this structure, crystalline Ni3V2O8 mainly provides the capacity and maintains the stability of the structure, while amorphous Co-B facilitates the diffusion of ions and optimizes electronic conductivity, synergistically leading to a specific capacity of 216.1 mAh g−1 (1789 F g−1) at 500 mA g−1, which is 1.5 times of Ni3V2O8 and 3.8 times of Co-B. Also, an asymmetric supercapacitors device is fabricated based on the Ni3V2O8@Co-B and activated carbon. The device displays an ultrahigh energy density of 91.2 Wh kg−1 at 400 W kg−1. These results imply that Ni3V2O8@Co-B nanocomposites show great promise for high-performance energy storage materials, and the unique structure of crystalline/ amorphous heterophase exhibits tremendous potential for electrochemical applications. © 2021 Elsevier Ltd
关键词	Activated carbon Borides Cobalt Crystalline materials Electric conductivity Energy storage Nanocomposites Oxides Vanadium compounds Capacity decay Cobalt boride Crystalline/amorphous heterostructure Electronic conductivity Energy Hybrid supercapacitors Nickel vanadate Specific capacities Theoretical capacity Vanadium oxides
DOI	10.1016/j.electacta.2021.138086
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000636207400010
出版者	Elsevier Ltd
EI入藏号	20211110084541
EI主题词	Supercapacitor
EI分类号	525.7 Energy Storage ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 701.1 Electricity: Basic Concepts and Phenomena ; 704.1 Electric Components ; 761 Nanotechnology ; 804 Chemical Products Generally ; 804.2 Inorganic Compounds ; 812.1 Ceramics ; 933 Solid State Physics ; 933.1 Crystalline Solids
来源库	WOS
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/147745
专题	材料科学与工程学院
通讯作者	Kong, Ling-Bin
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室; 材料科学与工程学院
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Hou, Jing-Feng,Gao, Jian-Fei,Kong, Ling-Bin. A crystalline nickel vanadium oxide@amorphous cobalt boride nanocomposites with enhanced specific capacity for hybrid supercapacitors[J]. Electrochimica Acta,2021,377.
APA	Hou, Jing-Feng,Gao, Jian-Fei,&Kong, Ling-Bin.(2021).A crystalline nickel vanadium oxide@amorphous cobalt boride nanocomposites with enhanced specific capacity for hybrid supercapacitors.Electrochimica Acta,377.
MLA	Hou, Jing-Feng,et al."A crystalline nickel vanadium oxide@amorphous cobalt boride nanocomposites with enhanced specific capacity for hybrid supercapacitors".Electrochimica Acta 377(2021).