LE PHAM AB, , Phuong; WERNERT, Romain; CAHU, Maëlle; SOUGRATI, Moulay Tahar; AQUILANTI, Giuliana; JOHANSSON, Patrik; MONCONDUIT, L.; STIEVANO, Lorenzo

doi:10.1039/D2TA08439B

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Licence d’utilisation du document

http://creativecommons.org/licenses/by-nc/

LE PHAM AB, , Phuong
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Advanced Lithium Energy Storage Systems - ALISTORE-ERI [ALISTORE-ERI]
Chalmers University of Technology [Göteborg]

WERNERT, Romain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]

CAHU, Maëlle
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]

Langue

Article de revue

Ce document a été publié dans

Journal of Materials Chemistry A. 2023-01-18, vol. 11, n° 6, p. 3091-3104

Royal Society of Chemistry

Résumé en anglais

A comprehensive description of the electrochemical mechanisms of the Prussian blue analogue (PBA) K1.67Mn0.65Fe0.35[Fe(CN)6]0.92•0.45H2O is obtained by combining several complementary ex situ and operando physicochemical characterisation techniques. This particular PBA, which shows very good electrochemical performance as a cathode material in potassium-ion batteries (PIBs), undergoes three successive redox reactions during the (de-)potassiation that are hereby identified by ex situ 57 Fe Mössbauer spectroscopy and operando Mn and Fe K-edge X-ray absorption spectroscopy. These reactions come along with notable modifications of the crystal structure, which are followed in real time by operando X-ray diffraction. The correlation of these results, interpreted with the support of chemometric methods, also reveals the limitations of this PBA, probably related to the deactivation of the Mn undergoing extensive reversible Jahn-Teller distortion during cycling as well as possible dissolution in the electrolyte. These results underline that optimisation of the chemical composition of PBAs is a crucial step towards the preparation of reliable and stable PBA-based cathodes for PIBs.< Réduire

DOI

http://dx.doi.org/10.1039/D2TA08439B

Project ANR

Vers des batteries innovantes K-ion - ANR-19-CE05-0026
Laboratory of excellency for electrochemical energy storage - ANR-10-LABX-0076
Nanoparticules de bleu de Prusse pour le théranostic

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026