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A study of the solid-electrolyte-interface (SEI) of ZnMn2O4: A conversion-type anode material for Li-Ion batteries

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1149/2.0141513jes
AuteurRechercher : 1; Rechercher : 1; Rechercher : 2
Affiliation
  1. Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
  2. Conseil national de recherches du Canada
FormatTexte, Article
SujetAnodes; Electric batteries; Electrodes; Electrolytes; Interfaces (materials); Ions; Lithium; Lithium compounds; Secondary batteries; Seebeck effect; Solid electrolytes; X ray photoelectron spectroscopy; Anode material; High capacity; Organic components; Reversible capacity; Solid electrolyte interfaces; Surface layers; Lithium-ion batteries
Résumé
The formation of a stable solid-electrolyte interface, SEI, is very crucial for the successful cycling of anode materials in Li-ion batteries. There is little known about the SEI layer formed at the surface of conversion-type anode materials in general and at the very high capacity ZnMn2O4 spinel anode material. In this work, Li-ion half-cells with ZnMn2O4 electrodes are assembled and tested at different conditions (cycling, temperature and the nature of the electrolyte) and the surface layer is examined by ex situ X-ray Photoelectron Spectroscopy (XPS) in the delithiated state. It is found that the SEI formed at ZnMn2O4 varies with composition but mostly composed of inorganic and organic components, similar to those observed for graphite. However, changes to the C 1s and O 1s spectra with cycling are not significant to correlate the extra reversible capacity to a polymer-like organic origin but rather to the presence of inorganic species such as LiF and LixPFyOz as evidenced by changes in the F 1s, P 2p and Li 1s spectra.
Date de publication
Dans
  • Journal of the Electrochemical Society 162, nº 13 (17 septembre 2015) : 7110–7117.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21277007
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Identificateur de l’enregistrement908e3b60-84b2-4097-ba21-f2619855fa55
Enregistrement créé2015-11-10
Enregistrement modifié2020-04-22
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