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Title: All-solid-state asymmetric supercapacitor based on porous cobalt selenide thin films

Journal Article · · Journal of Alloys and Compounds

As a significant semiconductor material, cobalt selenide has enormous potential and extensive application prospects in the field of solar cells, photocatalysis and supercapacitor. In this paper, porous CoSe thin films were successfully fabricated on stainless-steel sheet using a facile, effective electrodeposition technique. Electrochemical tests reveal that the specific capacitance reaches as high as 510 F g–1 at the current density of 1 A g–1 with the capacitance retention of 91% over 5000 cycles. An asymmetric all-solid-state supercapacitor is fabricated using CoSe thin film as the positive electrode and activate carbon as the negative electrode. The combined solid device displays a high area specific capacitance of 18.1 mF cm–2 accompanied with good cycling stability, outstanding flexibility and satisfactory mechanical stability. Furthermore, the solid devices connected in series can power the red light-emitting diodes. Here, the results show great potential for preparing large scale high energy density storage systems.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
11104062; 2018B19714; AC02-07CH11358
OSTI ID:
1471059
Alternate ID(s):
OSTI ID: 1636601
Report Number(s):
IS-J-9748; PII: S0925838818332523
Journal Information:
Journal of Alloys and Compounds, Vol. 772, Issue C; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (2)