FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors

doi:10.1021/acsaem.0c03062

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	FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors
	Zheng, Xuan 2; Jiang, Jinlong 1,2,3; Bi, Tiantian 2; Jin, Fangzhou 2; Li, Mingjie 2
刊名	ACS APPLIED ENERGY MATERIALS
	2021
卷号	4 期号:4 页码:3288-3296
关键词	interface engineering defect FeCo2S4 graphene supercapacitor
ISSN号	2574-0962
DOI	10.1021/acsaem.0c03062
英文摘要	Rational designing advanced materials with multicomponents and multiscale nanostructures is an important pathway to promote the rapid development and practical application of high-performance supercapacitors. Herein, FeCo2S4@Ni@graphene nanocomposites are prepared through electroless deposition-hydrothermal two-step method. In this hybrid structure, the metal nickel as a conductive bridge significantly enhances the charge transport and the structural stability between FeCo2S4 and graphene by encouraging the heterogeneous nucleation of FeCo2S4 on the active Ni@graphene. More importantly, the rich defects are induced into FeCo2S4@Ni@graphene by the interface engineering due to the lattice mismatch at the interface between Ni and FeCo2S4 and partial substitution of Ni for Co or Fe. These defects can provide additional faradic redox reactions and abundant active sites. Benefiting from the synergies of above advantages, the optimized FeCo2S4@Ni@graphene shows a specific capacity of 390.0 mAh g(-1) at 1 A g(-1). Additionally, the asymmetric supercapacitor based on FeCo2S4@Ni@ graphene delivers a high energy density of 65.8 Wh kg(-1) at 849 W kg(-1), as well as capacitance retention of 89.2% after 6000 cycles at 20 A g(-1). This work proposes an effective strategy, which is to regulate the defects in transition-metal compounds through heterointerface engineering to prepare advanced energy-storage materials.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000644737800034
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148238]
专题	理学院
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China; 2.Lanzhou Univ Technol, Sch Sci, Dept Phys, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Xuan,Jiang, Jinlong,Bi, Tiantian,et al. FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors[J]. ACS APPLIED ENERGY MATERIALS,2021,4(4):3288-3296.
APA	Zheng, Xuan,Jiang, Jinlong,Bi, Tiantian,Jin, Fangzhou,&Li, Mingjie.(2021).FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors.ACS APPLIED ENERGY MATERIALS,4(4),3288-3296.
MLA	Zheng, Xuan,et al."FeCo2S4@Ni@graphene Nanocomposites with Rich Defects Induced by Heterointerface Engineering for High-Performance Supercapacitors".ACS APPLIED ENERGY MATERIALS 4.4(2021):3288-3296.