Hybrid Electrochemical Behaviour of La1-xCaxMnO3Nano Perovskites and Recycled Polar Interspersed Graphene for Metal-Air Battery System

Brindha, R and Mohanraj, R and Manojkumar, P and Selvam, M and Sakthipandi, K (2020) Hybrid Electrochemical Behaviour of La1-xCaxMnO3Nano Perovskites and Recycled Polar Interspersed Graphene for Metal-Air Battery System. In: Journal of the Electrochemical Society, 167 (12).

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Abstract

Accumulations of waste dry cell batteries create irreparable damage to the environment. To address this issue, herewith we recycle the graphite electrode from waste dry cells to serve as a precursor for synthesising graphene electrolyte additives in metal-O2 battery system. Magnesium-O2 battery is an interesting option due to its high theoretical energy density (6800 WhKg-1) but tuning the electrode-electrolyte interfacial layer plays a major role. Utilizing La1-xCaxMnO3 (x = 0.70, 0.80 and 0.90) manganite perovskite and polar interspersed graphene as protective electrode-electrolyte passivation layers, drastically increases the battery performance. La1-xCaxMnO3 protective layer enhances the charge separation, charge transfer, reaction kinetics and reduces the charge recombination at the electrode surface. The specific discharge capacity of newly prepared La1-xCaxMnO3/interspersed graphene based Mg-air battery system is 1595.3 mAhg-1, which makes it more superior to regular Mg-O2 battery (890 mAhg-1). The interspersed graphene -based Mg/La1-xCaxMnO3 air battery shows excellent discharge capacity and notable electrochemical characteristics, which opens whole new spectrum of opportunity in modern electric vehicles. © 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

Item Type:	Journal Article
Publication:	Journal of the Electrochemical Society
Publisher:	IOP Publishing Ltd
Additional Information:	Copyright to this article belongs to IOP Publishing Ltd
Keywords:	Additives; Charge transfer; Electric discharges; Electrolytes; Electronic Waste; Graphene; Graphite electrodes; Lanthanum compounds; Magnesium compounds; Manganese compounds; Manganites; Passivation; Perovskite; Reaction kinetics; Recycling, Battery performance; Charge recombinations; Discharge capacities; Electrochemical behaviour; Electrochemical characteristics; Electrolyte additives; Manganite perovskites; Specific discharge capacity, Metal-air batteries
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	14 Dec 2020 09:13
Last Modified:	14 Dec 2020 09:13
URI:	http://eprints.iisc.ac.in/id/eprint/66843

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