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Vat Orange 11-Based Organic Cathode Material for High Rate Rechargeable Magnesium Battery

Debashis, T and Viswanatha, HM and Harish, MNK and Sampath, S (2020) Vat Orange 11-Based Organic Cathode Material for High Rate Rechargeable Magnesium Battery. In: Journal of the Electrochemical Society, 167 (7).

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Official URL: https://doi.org/10.1149/1945-7111/ab8827


Mg-ion batteries are of immense interest owing to their dendrite free chemistry, low cost and high energy density and often comparable to the existing Li-ion batteries. Organic molecules as electrodes, are well-explored in alkali metal ion batteries as they are less expensive, environment friendly and amenable to redox potential-tuning. But these molecules are rarely used for secondary Mg-ion batteries and they continue to attract attention. In the present studies, an organic dye, vat orange 11, is explored as a cathode material for non-aqueous secondary Mg-ion battery in different electrolytes. The electrolyte with salt-controlled dissolution approach turns out to be very good in terms of capacity recovery with long cycle life. It shows an excellent rate performance up to a discharge current of 4000 mA g-1 with high cycling stability (1000 cycles at 500 mA g-1 current density). Further, high capacity and high rate performance are observed using a non-nucleophilic electrolyte based on an ionic liquid. The possible mechanism of Mg2+ uptake is studied using ex situ FTIR spectroscopy that shows a transformation between carbonyl (-C=O) and enolate (-C=O-) functional groups during charge-discharge cycles. The present studies initiate the use of vat-based dye molecules in rechargeable Mg-ion batteries. © 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.

Item Type: Journal Article
Publication: Journal of the Electrochemical Society
Publisher: Institute of Physics Publishing
Additional Information: The copyright for this article belongs to Authors
Keywords: Cathode materials; Cathodes; Citrus fruits; Electrolytes; Fourier transform infrared spectroscopy; Ionic liquids; Magnesium; Metal ions; Metals; Molecules; Redox reactions, Charge-discharge cycle; Environment friendly; High energy densities; High-rate performance; Nucleophilic electrolytes; Organic cathode materials; Possible mechanisms; Rechargeable magnesium battery, Lithium-ion batteries
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 03 Nov 2021 11:16
Last Modified: 03 Nov 2021 11:16
URI: http://eprints.iisc.ac.in/id/eprint/65628

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