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

Research output: Contribution to journalArticlepeer-review

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.
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Original languageEnglish
Article number024004
Number of pages9
JournalJournal of Physics: Materials
Volume4
Issue number2
DOIs
Publication statusPublished - 25 Feb 2021

    Research areas

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

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