KFe(C 2 O 4 )F: A Fluoro‐oxalate Cathode Material for Li/Na‐Ion Batteries - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue ChemElectroChem Année : 2023

KFe(C 2 O 4 )F: A Fluoro‐oxalate Cathode Material for Li/Na‐Ion Batteries

Résumé

Abstract The iron‐based polyanionic fluoro‐oxalate material, KFe(C 2 O 4 )F (KFCF), has been synthesized by hydrothermal methods. This compound shows promising reversible lithium and sodium insertion properties as a cathode material. The material delivered a first‐cycle discharge capacity of 120 mAh g −1 at ∼3.3 V (Li + /Li) and 97.4 mAh g −1 at ∼3.0 V (Na + /Na) in LIB and NIB, respectively. Stable cycling performance was observed in both cases. The involvement of reversible Fe 2+ /Fe 3+ redox was confirmed by ex‐situ Mössbauer spectroscopy supported by first‐principles calculations. This study reveals promising performance from a mixed oxalate‐fluoride based polyanionic material thereby opening up further possibilities for materials discovery in the design of new electrode materials.

Domaines

Chimie

Dates et versions

hal-04227316 , version 1 (03-10-2023)

Identifiants

Citer

Atin Pramanik, Alexis Manche, Megan Smeaton, Moulay‐tahar Sougrati, Philip Lightfoot, et al.. KFe(C 2 O 4 )F: A Fluoro‐oxalate Cathode Material for Li/Na‐Ion Batteries. ChemElectroChem, 2023, 10 (14), ⟨10.1002/celc.202300192⟩. ⟨hal-04227316⟩
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