Phase transformation in Na-Fe-S-O quaternary sulfate cathode materials

Dwibedi, D and Singh, S and Pranav, S and Barpanda, P (2019) Phase transformation in Na-Fe-S-O quaternary sulfate cathode materials. In: 63rd DAE Solid State Physics Symposium 2018, 18 - 22 December 2018, Haryana.

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Abstract

In last one decade, there have been a resurgence in interest followed by a rigorous research in sodium-ion intercalation chemistry for rechargeable battery application. Though lithium-ion chemistry has been a commercial success and is a lynchpin of the portable electronics era, sodium-ion chemistry can economically address the large-scale stationary rechargeable battery market and offers the exciting avenues of novel intercalation structures, some of which may not exist in their lithium equivalents. To realize the commercially viable large-scale Na-based batteries, the concept of earth abundance should consistently be applied throughout their design. Of significance, compounds constituting Na-Fe-S-O type elements show promising results. In this line, alluaudite structured Na2Fe2(SO4)3 has been reported benchmarking the highest Fe3+/Fe2+ redox potential at 3.8V (vs. Na) with excellent rate capability and competent energy density. In pursuit of energy-savvy synthesis of this sulfate cathode, this work reports two aqueous based synthesis namely Pechini and spray dry routes. Further, various other Na-Fe-S-O quaternary cathodes along the Na2SO4 and FeSO4 binary phase line and their possible phase transformation have been studied in detail. © 2019 Author(s).

Item Type:	Conference Paper
Publication:	AIP Conference Proceedings
Publisher:	American Institute of Physics Inc.
Additional Information:	The copyright for this article belongs to American Institute of Physics Inc.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	09 Jan 2023 05:45
Last Modified:	09 Jan 2023 05:45
URI:	https://eprints.iisc.ac.in/id/eprint/78887

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