Cobalt–Phosphate-Based Insertion Material as a Multifunctional Cathode for Rechargeable Hybrid Sodium–Air Batteries

Murugesan, C and Senthilkumar, B and Choudhary, K and Barpanda, P (2020) Cobalt–Phosphate-Based Insertion Material as a Multifunctional Cathode for Rechargeable Hybrid Sodium–Air Batteries. [Book Chapter]

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Abstract

Herein, we introduce the concept of using multifunctional air–cathode to advance the performance of hybrid sodium–air batteries (NABs) by utilizing intercalation/ deintercalation followed by OER/ORR mechanism. As a case study, sodium tetra-cobalt triphosphate NaCo4(PO4)3 was chosen and was synthesized by solution combustion synthesis technique. The synthesised NaCo4(PO4)3 had unique 5- coordination cobalt, which offers a different environment to the incoming oxygen that facilitates the oxygen-binding on the active site. It showed porous morphology that allows proper wettability of the electrolyte. The NaCo4(PO4)3 exhibits bi-functional OER/ORR catalytic activity as well as OH− ion (de)intercalation due to its multiple redox behaviours. The possible ORR and OER mechanism is explored. The hybrid NABs with NaCo4(PO4)3 as air–cathode delivered high power and energy density with improved round-trip efficiency.

Item Type:	Book Chapter
Publication:	Recent Research Trends in Energy Storage Devices: Select Papers from IMSED 2018
Publisher:	Springer Singapore
Additional Information:	The copyright for this article belongs to Springer Singapore.
Keywords:	Cathode; Cobalt-phosphate; Na-air battery
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	17 May 2023 05:45
Last Modified:	17 May 2023 05:45
URI:	https://eprints.iisc.ac.in/id/eprint/81631

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