Selenium-doped Se-CoSe2@ZnSe heterojunction structure derived from ZIF-8 metal organic skeleton is used in high-performance asymmetric supercapacitors

doi:10.1016/j.jallcom.2022.167100

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	Selenium-doped Se-CoSe2@ZnSe heterojunction structure derived from ZIF-8 metal organic skeleton is used in high-performance asymmetric supercapacitors
	Li, Ling 1,2; Wei, Zhiqiang 1,2; Liu, Weizhe 1; Ding, Meijie 1,2; Li, Zhiming 1,2
刊名	Journal of Alloys and Compounds
	2022-12-15
卷号	927
关键词	Electrochemical electrodes Heterojunctions II-VI semiconductors Metal ions Metal-Organic Frameworks Metals Nanospheres Selenium Selenium compounds Asymmetric supercapacitor Density function theory Heterogeneous structures Heterojunction structures Metalorganic frameworks (MOFs) Metalorganics Performance Selenia doped Selenia vacancy Selenization
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2022.167100
英文摘要	Reasonable construction of multi-pore heterogeneous structures and enhancement of synergistic interaction between metal ions are important means to improve the performance of supercapacitors. This work selected metal organic frameworks (MOF) as the sacrificial template, and Se-doped needle-like nanosphere heterostructures Se-CoSe2@ZnSe were successfully prepared by in situ growth and selenization treatment. The specific capacity of the Se-CoSe2@ZnSe-5 (CZS-5) electrode is up to 2469.12 F g−1 at 1 A g−1, and the capacity retention rate of 3000 cycles at a current density of 10 A g−1 is 85.39 %. The CZS-5//AC hybrid supercapacitor has a high power density of 1280.00 W kg−1 at an energy density of 68.88 Wh kg−1. The excellent electrochemical properties are attributed to the construction of Se-CoSe2@ZnSe heterostructure of needle-shaped nanospheres enhances the synergy between Zn and Co ions; the doping of selenium effectively improves the conductivity of the electrode material; selenium vacancies produced during selenization increase the activity of the active site. In addition, the density functional theory (DFT) calculation shows that Se-CoSe2@ZnSe-5 has higher density of states (DOS) near the Fermi energy level, which provides additional theoretical support for the improvement of electrochemical performance. © 2022 Elsevier B.V.
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159725]
专题	理学院
作者单位	1.School of Science, 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	Li, Ling,Wei, Zhiqiang,Liu, Weizhe,et al. Selenium-doped Se-CoSe2@ZnSe heterojunction structure derived from ZIF-8 metal organic skeleton is used in high-performance asymmetric supercapacitors[J]. Journal of Alloys and Compounds,2022,927.
APA	Li, Ling,Wei, Zhiqiang,Liu, Weizhe,Ding, Meijie,&Li, Zhiming.(2022).Selenium-doped Se-CoSe2@ZnSe heterojunction structure derived from ZIF-8 metal organic skeleton is used in high-performance asymmetric supercapacitors.Journal of Alloys and Compounds,927.
MLA	Li, Ling,et al."Selenium-doped Se-CoSe2@ZnSe heterojunction structure derived from ZIF-8 metal organic skeleton is used in high-performance asymmetric supercapacitors".Journal of Alloys and Compounds 927(2022).