K2Fe(C2O4)2: an oxalate cathode for Li/Na-ion batteries exhibiting a combination of multielectron cation and anion redox

DOI: 10.1021/acs.chemmater.3c00063

Authors: Atin Pramanik (University of St. Andrews) , Alexis G. Manche (University of St. Andrews; The Faraday Institution) , Moulay Tahar Sougrati (Université de Montpellie) , Alan V. Chadwick (University of Kent) , Philip Lightfoot (University of St Andrews) , A. Robert Armstrong (University of St Andrews; The Faraday Institution)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry Of Materials

State: Published (Approved)
Published: March 2023
Diamond Proposal Number(s): 25120

Abstract: The development of multielectron redox-active cathode materials is a top priority for achieving high energy density with long cycle life in the next-generation secondary battery applications. Triggering anion redox activity is regarded as a promising strategy to enhance the energy density of polyanionic cathodes for Li/Na-ion batteries. Herein, K2Fe(C2O4)2 is shown to be a promising new cathode material that combines metal redox activity with oxalate anion (C2O42–) redox. This compound reveals specific discharge capacities of 116 and 60 mAh g–1 for sodium-ion batterie (NIB) and lithium-ion batterie (LIB) cathode applications, respectively, at a rate of 10 mA g–1, with excellent cycling stability. The experimental results are complemented by density functional theory (DFT) calculations of the average atomic charges.

Diamond Keywords: Batteries; Lithium-ion; Sodium-ion

Subject Areas: Materials, Chemistry, Energy


Instruments: B18-Core EXAFS

Added On: 15/03/2023 09:47

Documents:
acs.chemmater.3c00063.pdf

Discipline Tags:

Energy Storage Energy Physical Chemistry Energy Materials Chemistry Materials Science Chemical Engineering Engineering & Technology

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)