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 2; Gao, Jian-Fei 2; Kong, Ling-Bin 1,2
刊名	Electrochimica Acta
	2021-05-01
卷号	377
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
ISSN号	0013-4686
DOI	10.1016/j.electacta.2021.138086
英文摘要	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
WOS研究方向	Electrochemistry
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000636207400010
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147745]
专题	材料科学与工程学院
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
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).