Role of Singlet Oxygen Quencher in Recharge Overpotential for Nonaqueous Lithium Air Batteries

Akhila, S and Aetukuri, NPB (2022) Role of Singlet Oxygen Quencher in Recharge Overpotential for Nonaqueous Lithium Air Batteries. In: 2022 IEEE International Conference on Emerging Electronics (ICEE), 11-14 December 2022, Bangalore, India.

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Abstract

Aprotic lithium oxygen batteries have gained enormous attention due to their high specific energy. However, while not compromising on rechargeability, the practical realization of the theoretically possible high specific energies has been elusive. Here, we use a singlet oxygen quencher, DABCO, and study the changes in recharge overpotential and parasitic reactions using a combination of galvanostatic charge-discharge measurements and gas analysis via differential electrochemical mass spectrometry. We find that the presence of quencher lowers the recharge overpotential. Interestingly, the higher concentration of quencher mediates electrolyte degradation and reduces oxygen evolution efficiency. Our results imply that a better understanding of the mechanisms and identifying stable additives that minimize parasitic chemistry during cell operation will be critical for rechargeable metal-oxygen batteries

Item Type:	Conference Paper
Publication:	2022 IEEE International Conference on Emerging Electronics, ICEE 2022
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the IEEE.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	27 Jun 2023 07:35
Last Modified:	27 Jun 2023 07:35
URI:	https://eprints.iisc.ac.in/id/eprint/82172

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