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Bifunctional NiCo2Se4 and CoNi2Se4 nanostructures: Efficient electrodes for battery-type supercapacitors and electrocatalysts for the oxygen evolution reaction by Rajesh, John Anthuvan ;Lee, Young-Hoon ;Yun, Yong-Han ;Vinh Quy, Vu Hong ;Kang, Soon-Hyung ;Kim, Hyunsoo ;Ahn, Kwang-Soon is a Engineering article available to read on EtoBox.
What is Bifunctional NiCo2Se4 and CoNi2Se4 nanostructures: Efficient electrodes for battery-type supercapacitors and electrocatalysts for the oxygen evolution reaction about?
We report the fabrication of bimetallic NiCo2Se4 and CoNi2Se4 nanostructures on nickel-foam (Ni-foam) substrates via a potentiostatic-deposition method by adjusting the molar ratio of Ni and Co metals. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that burl-like clusters with characteristic fluffy NiCo2Se4 and flake-like CoNi2Se4 hierarchical structures were deposited on the Ni-foam substrates. When used as battery-type electrodes in supercapacitors, both NiCo2Se4 and CoNi2Se4 electrodes exhibited outstanding capacity and good electrochemical properties. The CoNi2Se4 electrode delivered excellent capacity and cycling stability (602Cg–1 at 1Ag–1 and 98.30% retention after 5000 cycles at 40Ag–1) when compared to the NiCo2Se4 electrode (353Cg–1 at 1Ag–1 and 96.83% retention after 5000 cycles at 40Ag–1). Furthermore, as-deposited NiCo2Se4 and CoNi2Se4 hierarchical structures were employed as efficient electrocatalysts for water oxidation in alkaline solutions. NiCo2Se4 and CoNi2Se4 electrocatalysts showed low overpotentials of 257 and 244mV in a 1.0M KOH aqueous solution, respectively. The electrocatalysts also exhibited prolonged stability
Who reads Bifunctional NiCo2Se4 and CoNi2Se4 nanostructures: Efficient electrodes for battery-type supercapacitors and electrocatalysts for the oxygen evolution reaction?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Rajesh, John Anthuvan ;Lee, Young-Hoon ;Yun, Yong-Han ;Vinh Quy, Vu Hong ;Kang, Soon-Hyung ;Kim, Hyunsoo ;Ahn, Kwang-Soon
- Publisher
- Elsevier ; Korean Society of Industrial Engineering Chemistry; Elsevier BV (ISSN 1226-086X)
- Published
- 2019
- Language
- EN
- Field
- Engineering (Physical Sciences)