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Cobalt Metaphosphates as Economic Bifunctional Electrocatalysts for Hybrid Sodium-Air Batteries

Murugesan, C and Musthafa, M and Lochab, S and Barpanda, P (2021) Cobalt Metaphosphates as Economic Bifunctional Electrocatalysts for Hybrid Sodium-Air Batteries. In: Inorganic Chemistry, 60 (16). pp. 11974-11983.

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Official URL: https://doi.org/10.1021/acs.inorgchem.1c01009

Abstract

Bifunctional electrocatalysts are pre-eminent to achieve high capacity, cycling stability, and high Coulombic efficiency for rechargeable hybrid sodium-air batteries. The current work introduces metaphosphate (Na)KCo(PO3)3 nanostructures as noble metal-free bifunctional electrocatalysts suitable for the rechargeable aqueous sodium-air battery. Prepared by the scalable solution combustion method, the metaphosphate class of (Na)KCo(PO3)3 with spherical morphology exhibited robust oxygen reduction as well as evolution activity similar to the state-of-the-art catalysts. NaCo(PO3)3 metaphosphate, when employed as an air cathode in hybrid sodium-air batteries, delivered reasonably low overpotential along with excellent cycling stability with a round-trip energy efficiency of 78. Cobalt metaphosphates thus form a new class of economical bifunctional catalysts to develop hybrid sodium-air batteries. © 2021 American Chemical Society.

Item Type: Journal Article
Publication: Inorganic Chemistry
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to American Chemical Society
Keywords: Cobalt compounds; Electrocatalysts; Electrolysis; Electrolytic reduction; Energy efficiency; Precious metals; Sodium; Sodium compounds, Bi-functional catalysts; Bifunctional electrocatalysts; Coulombic efficiency; Cycling stability; Oxygen Reduction; Scalable solution; Spherical morphologies; State of the art, Secondary batteries
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 02 Dec 2021 13:00
Last Modified: 02 Dec 2021 13:00
URI: http://eprints.iisc.ac.in/id/eprint/70084

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