Enabling the Electrochemical Activity in Sodium Iron Metaphosphate [NaFe(PO3)3] Sodium Battery Insertion Material: Structural and Electrochemical Insights

Gond, Ritambhara and Meena, Sher Singh and Yusuf, SM and Shukla, Vivekanand and Jena, Naresh K and Ahuja, Rajeev and Okada, Shigeto and Barpanda, Prabeer (2017) Enabling the Electrochemical Activity in Sodium Iron Metaphosphate [NaFe(PO3)3] Sodium Battery Insertion Material: Structural and Electrochemical Insights. In: Inorganic Chemistry, 56 (10). pp. 5918-5929. ISSN 0020-1669

	PDF ino_che_56-10_5918-5929_2017.pdf - Published Version Restricted to Registered users only Download (9MB) | Request a copy
Preview	PDF Supplementary_ino_che_56-10_5918-5929_2017.pdf - Published Supplemental Material Download (90kB) | Preview

Abstract

Sodium-ion batteries are widely pursued as an economic alternative to lithium-ion battery technology, where Fe- and Mn-based compounds are particularly attractive owing to their elemental abundance. Pursuing phosphate-based polyanionic chemistry, recently solid-state prepared NaFe(PO3)3 metaphosphate was unveiled as a novel potential sodium insertion material, although it was found to be electrochemically inactive. In the current work, employing energy-savvy solution combustion synthesis, NaFe2+(PO3)3 was produced from low-cost Fe3+ precursors. Owing to the formation of nanoscale carbon-coated product, electrochemical activity was enabled in NaFe(PO3)3 for the first time. In congruence with the first principles density functional theory (DFT) calculations, an Fe3+/Fe2+ redox activity centered at 2.8 V (vs Na/Na+) was observed. Further, the solid-solution metaphosphate family Na(Fe1-xMnx)(PO3)3 (x = 0-1) was prepared for the first time. Their structure and distribution of transition metals (TM = Fe/Mn) was analyzed with synchrotron diffraction, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy. Synergizing experimental and computational tools, NaFe(PO3)3 metaphosphate is presented as an electrochemically active sodium insertion host material.

Item Type:	Journal Article
Publication:	Inorganic Chemistry
Publisher:	American Chemical Society
Additional Information:	The Copyright of this article belongs to the American Chemical Society
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	07 Jun 2022 10:22
Last Modified:	07 Jun 2022 10:22
URI:	https://eprints.iisc.ac.in/id/eprint/72931

Actions (login required)

View Item