Exploring the effects of temperature-driven phase transition on supercapacitive performance of cobalt diselenide

doi:10.1016/j.jpowsour.2022.231683

CORC > 兰州理工大学 > 兰州理工大学

	Exploring the effects of temperature-driven phase transition on supercapacitive performance of cobalt diselenide
	Li, Mingjie 1,2; Liu, Weizhe 1; Ju, Jiaming 1; Xie, Lixiang 1; Chen, Yuhong 1; Jiang, Jinlong 2
刊名	JOURNAL OF POWER SOURCES
	2022-09-01
卷号	541
关键词	Cobalt diselenide Phase transition Supercapacitor Density function theory
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2022.231683
英文摘要	Recently, doping-induced phase transition of cobalt diselenide have been explored extensively for applications in the electrocatalysis, lithium-ion batteries, and sodium-ion batteries, however, there are very few works on understanding of the relationship between phase transition and supercapacitor performance up to now. Herein, we report a temperature-driven phase transformation strategy to synthesize metastable orthorhombic o-CoSe2 and stable c-CoSe2 by the thermal induced in-situ reaction of cobalt precursor and selenium powder. The o-CoSe2 shows a higher specific capacity (244.2 mAh g(- 1) at 1.0 A g(-1)), while c-CoSe2 shows a better cycling stability (103.0% capacity retention after 2000 cycles at 10.0 A g(-1)). Combing density functional theory (DFT) calculations and experimental results, we explain the unique effects of phase structure on supercapacitive perfor-mance. Furthermore, a hybrid supercapacitor of o-CoSe2//AC delivers a high energy density of 79.1 Wh kg(-1) at a power density of 850.0 W kg(-1), which suggests the prospects of practical application as energy storage device. Our work provides useful guidance for the design of cobalt diselenide based materials for supercapacitors.
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000809641200002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158864]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; 2.Shandong Lab Yantai Adv Mat & Green Mfg, Yantai 264006, Peoples R China
推荐引用方式 GB/T 7714	Li, Mingjie,Liu, Weizhe,Ju, Jiaming,et al. Exploring the effects of temperature-driven phase transition on supercapacitive performance of cobalt diselenide[J]. JOURNAL OF POWER SOURCES,2022,541.
APA	Li, Mingjie,Liu, Weizhe,Ju, Jiaming,Xie, Lixiang,Chen, Yuhong,&Jiang, Jinlong.(2022).Exploring the effects of temperature-driven phase transition on supercapacitive performance of cobalt diselenide.JOURNAL OF POWER SOURCES,541.
MLA	Li, Mingjie,et al."Exploring the effects of temperature-driven phase transition on supercapacitive performance of cobalt diselenide".JOURNAL OF POWER SOURCES 541(2022).