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K\(_2\)Fe(C\(_2\)O\(_4\))\(_2\): An Oxalate Cathode for Li/Na-Ion Batteries Exhibiting a Combination of Multielectron Cation and Anion Redox

Pramanik, Atin, Manche, Alexis G., Sougrati, Moulay Tahar, Chadwick, Alan V., Lightfoot, Philip, Armstrong, A. Robert (2023) K\(_2\)Fe(C\(_2\)O\(_4\))\(_2\): An Oxalate Cathode for Li/Na-Ion Batteries Exhibiting a Combination of Multielectron Cation and Anion Redox. Chemistry of Materials, 35 (6). pp. 2600-2611. ISSN 1520-5002. (doi:10.1021/acs.chemmater.3c00063) (KAR id:100559)

Abstract

The development of multielectron redox-active cathode materials is a top priority for achieving high energy density with long cycle life in the next-generation secondary battery applications. Triggering anion redox activity is regarded as a promising strategy to enhance the energy density of polyanionic cathodes for Li/Na-ion batteries. Herein, K\(_2\)Fe(C\(_2\)O\(_4\))\(_2\) is shown to be a promising new cathode material that combines metal redox activity with oxalate anion (C\(_2\)O\({_4}^{2-}\) redox. This compound reveals specific discharge capacities of 116 and 60 mAh g\(^{–1}\) for sodium-ion batterie (NIB) and lithium-ion batterie (LIB) cathode applications, respectively, at a rate of 10 mA g\(^{–1}\), with excellent cycling stability. The experimental results are complemented by density functional theory (DFT) calculations of the average atomic charges.

Item Type: Article
DOI/Identification number: 10.1021/acs.chemmater.3c00063
Additional information: For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.
Uncontrolled keywords: Materials Chemistry, General Chemical Engineering, General Chemistry
Subjects: Q Science
Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Funders: Engineering and Physical Sciences Research Council (https://ror.org/0439y7842)
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 22 Mar 2023 15:29 UTC
Last Modified: 27 Feb 2024 10:58 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/100559 (The current URI for this page, for reference purposes)

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