Fe-doped CoS2 nanospheres decorated by reduced graphene oxide nanosheets as ultrahigh-rate anodes for advanced sodium-ion capacitors

doi:10.1016/j.jelechem.2021.115740

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Fe-doped CoS2 nanospheres decorated by reduced graphene oxide nanosheets as ultrahigh-rate anodes for advanced sodium-ion capacitors
	Xu, Ying-Ge 1; Liu, Jian 1; Kong, Ling-Bin 1,2
刊名	JOURNAL OF ELECTROANALYTICAL CHEMISTRY
	2021-11-15
卷号	901
关键词	Fe doping Reduced graphene oxide Pseudocapacitive effect Sodium-ion capacitors CoS2
ISSN号	1572-6657
DOI	10.1016/j.jelechem.2021.115740
英文摘要	Sodium-ion capacitors (SICs) have gained greatly attention due to their high specific energy and power. Nevertheless, the anodes often suffer from low specific capacity, inferior rate capability, and poor cycling stability because of Na+ large ion radius and sluggish reaction kinetics. To improve the electrochemical performance of anodes, we design Fe-doped CoS2 nanospheres grown in situ on reduced graphene oxide nanosheets (Fe-CoS2/rGO) composite by a facile hydrothermal approach, which exhibits an outstanding reversible specific capacity of 590.7 mA h g(-1) at specific current of 100 mA g(-1) over 100 cycles. Galvanostatic intermittent titration technique (GITT) demonstrates that Fe-CoS2/rGO delivers high Na+ diffusion coefficient ranging from 1.137 x 10(-7) to 3.64 x 10(-7) cm(2) s-1. Furthermore, the SICs composed of the optimized FeCoS2/rGO anodes and the pistachio shell-derived porous carbon cathodes display an admirable specific energy of 137.57 W h kg(-1) (based on the total mass of anode and cathode) at the specific power of 937.5 W kg(-1), with a voltage window of 2.5 V, which is benefit for the development of sodium-ion capacitors.
WOS研究方向	Chemistry ; Electrochemistry
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000709805200011
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150012]
专题	石油化工学院材料科学与工程学院
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
推荐引用方式 GB/T 7714	Xu, Ying-Ge,Liu, Jian,Kong, Ling-Bin. Fe-doped CoS2 nanospheres decorated by reduced graphene oxide nanosheets as ultrahigh-rate anodes for advanced sodium-ion capacitors[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2021,901.
APA	Xu, Ying-Ge,Liu, Jian,&Kong, Ling-Bin.(2021).Fe-doped CoS2 nanospheres decorated by reduced graphene oxide nanosheets as ultrahigh-rate anodes for advanced sodium-ion capacitors.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,901.
MLA	Xu, Ying-Ge,et al."Fe-doped CoS2 nanospheres decorated by reduced graphene oxide nanosheets as ultrahigh-rate anodes for advanced sodium-ion capacitors".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 901(2021).