Iron-based fluorophosphate Na2FePO4F as a cathode for aqueous zinc-ion batteries

Deepa Singh; Yang Hu; Sher Singh Meena; Rishikesh Vengarathody; Maximilian Fichtner; Prabeer Barpanda

doi:10.1039/d3cc04940j

Iron-based fluorophosphate Na₂FePO₄F as a cathode for aqueous zinc-ion batteries

Chem Commun (Camb). 2023 Dec 5;59(97):14391-14394. doi: 10.1039/d3cc04940j.

Authors

Deepa Singh¹, Yang Hu², Sher Singh Meena³, Rishikesh Vengarathody², Maximilian Fichtner^{2

4}, Prabeer Barpanda^{1

2

4}

Affiliations

¹ Faraday Materials Laboratory (FaMaL), Materials Research Centre, Indian Institute of Science, Bangalore 560012, India. prabeer@iisc.ac.in.
² Helmholtz Institute Ulm (HIU), Electrochemical Energy Storage, Ulm 89081, Germany.
³ Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
⁴ Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe 76021, Germany.

PMID: 37934428
DOI: 10.1039/d3cc04940j

Abstract

Aqueous zinc-ion batteries form a key post-Li-ion batteries to cater the rising demand for grid storage. Fe-based compounds can be used as economical cathodes for zinc-ion batteries. Herein, we explored iron-based flourophosphate as a potential polyanionic cathode. Involving the Fe^3+/2+ redox process, it can reversibly intercalate Zn²⁺ yielding a capacity of ∼80 mA h g^-1, involving a solid-solution mechanism. Polyanionic Fe-based phosphate frameworks can be harnessed as potential low-cost cathodes for secondary zinc-ion batteries.