Na2Fe(C2O4)(HPO4): a promising new oxalate-phosphate based mixed polyanionic cathode for Li/Na ion batteries

Atin Pramanik; Alasdair Joseph Bradford; Steve Lee; Philip Lightfoot; Robert Armstrong

doi:10.1088/2515-7639/abe5f9

Na₂Fe(C₂O₄)(HPO₄): a promising new oxalate-phosphate based mixed polyanionic cathode for Li/Na ion batteries

Atin Pramanik, Alasdair Joseph Bradford, Steve Lee, Philip Lightfoot, Robert Armstrong

Research output: Contribution to journal › Article › peer-review

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Abstract

The new iron-based mixed polyanionic material Na₂Fe(C₂O₄)(HPO₄) has been synthesized by a hydrothermal technique. The compound contains four Na sites with a three-dimensional crystal structure. This compound shows promising reversible Li and Na insertion properties as a cathode material. The redox potentials observed were ~3.2 V (vs Li⁺/Li) for the Li-ion cell and ~3.1 V (vs Na⁺/Na) for the Na-ion cell with Fe^2+/3+ redox reactions. The reversible electrode operation was found to deliver 71 and 104 mAh g⁻¹ specific capacities in Li and Na half cells, respectively. This present study reveals promising performance from a mixed oxalate-phosphate based polyanionic material and opens up further possibilities for materials discovery.

Original language	English
Article number	024004
Number of pages	9
Journal	Journal of Physics: Materials
Volume	4
Issue number	2
DOIs	https://doi.org/10.1088/2515-7639/abe5f9
Publication status	Published - 25 Feb 2021

Keywords

Na2Fe(C2O4)(HPO4)
Oxalate-phosphate mixed polyanion
Sodium-ion battery
Lithium-ion battery
Cathode

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Pramanik_2021_JPM_Oxalate-phosphate_CC
Copyright © 2021 The Author(s). Published by IOP Publishing Ltd. Open Access. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Final published version, 2.06 MBLicence: CC BY

Cite this

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title = "Na2Fe(C2O4)(HPO4): a promising new oxalate-phosphate based mixed polyanionic cathode for Li/Na ion batteries",

abstract = "The new iron-based mixed polyanionic material Na2Fe(C2O4)(HPO4) has been synthesized by a hydrothermal technique. The compound contains four Na sites with a three-dimensional crystal structure. This compound shows promising reversible Li and Na insertion properties as a cathode material. The redox potentials observed were ~3.2 V (vs Li+/Li) for the Li-ion cell and ~3.1 V (vs Na+/Na) for the Na-ion cell with Fe2+/3+ redox reactions. The reversible electrode operation was found to deliver 71 and 104 mAh g−1 specific capacities in Li and Na half cells, respectively. This present study reveals promising performance from a mixed oxalate-phosphate based polyanionic material and opens up further possibilities for materials discovery.",

keywords = "Na2Fe(C2O4)(HPO4), Oxalate-phosphate mixed polyanion, Sodium-ion battery, Lithium-ion battery, Cathode",

author = "Atin Pramanik and Bradford, {Alasdair Joseph} and Steve Lee and Philip Lightfoot and Robert Armstrong",

note = "The authors thank EPSRC EP/R030472/1 for financial support.",

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T2 - a promising new oxalate-phosphate based mixed polyanionic cathode for Li/Na ion batteries

AU - Pramanik, Atin

AU - Bradford, Alasdair Joseph

AU - Lee, Steve

AU - Lightfoot, Philip

AU - Armstrong, Robert

N1 - The authors thank EPSRC EP/R030472/1 for financial support.

PY - 2021/2/25

Y1 - 2021/2/25

N2 - The new iron-based mixed polyanionic material Na2Fe(C2O4)(HPO4) has been synthesized by a hydrothermal technique. The compound contains four Na sites with a three-dimensional crystal structure. This compound shows promising reversible Li and Na insertion properties as a cathode material. The redox potentials observed were ~3.2 V (vs Li+/Li) for the Li-ion cell and ~3.1 V (vs Na+/Na) for the Na-ion cell with Fe2+/3+ redox reactions. The reversible electrode operation was found to deliver 71 and 104 mAh g−1 specific capacities in Li and Na half cells, respectively. This present study reveals promising performance from a mixed oxalate-phosphate based polyanionic material and opens up further possibilities for materials discovery.

AB - The new iron-based mixed polyanionic material Na2Fe(C2O4)(HPO4) has been synthesized by a hydrothermal technique. The compound contains four Na sites with a three-dimensional crystal structure. This compound shows promising reversible Li and Na insertion properties as a cathode material. The redox potentials observed were ~3.2 V (vs Li+/Li) for the Li-ion cell and ~3.1 V (vs Na+/Na) for the Na-ion cell with Fe2+/3+ redox reactions. The reversible electrode operation was found to deliver 71 and 104 mAh g−1 specific capacities in Li and Na half cells, respectively. This present study reveals promising performance from a mixed oxalate-phosphate based polyanionic material and opens up further possibilities for materials discovery.

KW - Na2Fe(C2O4)(HPO4)

KW - Oxalate-phosphate mixed polyanion

KW - Sodium-ion battery

KW - Lithium-ion battery

KW - Cathode

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