Uniform growth of ZnS nanoflakes for high-performance supercapacitor applications. (April 2021)

• Record Type: Journal Article
• Authors: Hussain, Iftikhar; Mohapatra, Debananda; Dhakal, Ganesh; Lamiel, Charmaine; Sayed, Mostafa Saad; Sahoo, Sumanta; Mohamed, Saad Gomaa; Kim, Jong Su; Lee, Yong Rok; Shim, Jae-Jin
• Is Part Of: Journal of energy storage. Volume 36(2021)
• Publication Date: 2021-04
• Subjects: ZnS -- Nanoflake -- Single-step synthesis -- Supercapacitor -- LED; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2021.102408
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: The morphology of zinc sulfide nanoflakes on Ni foam was successfully controlled. ZnS nanoflakes exhibited a high specific capacity of 650 C g −1 at 2 A g −1 . Asymmetric supercapacitor device delivered high specific energy of 30 Wh kg –1 . Asymmetric supercapacitor device delivered a high specific power of 14 kW kg −1 . Asymmetric supercapacitor device illuminated 52 red LEDs for 100 s. Abstract: The cost-effective, efficient, and straightforward synthesis of materials for supercapacitor applications has attracted considerable attention for practical applications. In this study, thin zinc sulfide (ZnS) nanoflakes were grown on nickel foam by a facile single-step hydrothermal method. The resulting ZnS electrode delivered a high specific capacity of 659 C g –1 at 2 A g –1 and excellent cycling stability. It could function as a positive electrode in KOH electrolyte for high-performance supercapacitors. The device exhibited a remarkable specific capacity of 154 C g –1, high specific energy of 30 Wh kg –1, high specific power of 14 kW kg –1, and only a 4% decrease in the capacitance retention over 2000 cycles. Additionally, two serially connected asymmetric supercapacitor devices powered 52 red light-emitting diodes connected closely with 100 s. Graphical abstract: Binder free ZnS nanoflakes grown on nickel foam for a high performance supercapacitors Image, graphical abstract .