A multi-technique approach to understanding delithiation damage in LiCoO2 thin films

Abstract We report on the delithiation of LiCoO2 thin films using oxalic acid (C2H2O4) with the goal of understanding the structural degradation of an insertion oxide associated with Li chemical extraction. Using a multi-technique approach that includes synchrotron radiation X-ray diffraction, scann...

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Autores principales:	E. Salagre, S. Quílez, R. de Benito, M. Jaafar, H. P. van der Meulen, E. Vasco, R. Cid, E. J. Fuller, A. A. Talin, P. Segovia, E. G. Michel, C. Polop
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8c64e14c87be4599a335dec82392a134
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spelling	oai:doaj.org-article:8c64e14c87be4599a335dec82392a1342021-12-02T17:30:46ZA multi-technique approach to understanding delithiation damage in LiCoO2 thin films10.1038/s41598-021-91051-32045-2322https://doaj.org/article/8c64e14c87be4599a335dec82392a1342021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91051-3https://doaj.org/toc/2045-2322Abstract We report on the delithiation of LiCoO2 thin films using oxalic acid (C2H2O4) with the goal of understanding the structural degradation of an insertion oxide associated with Li chemical extraction. Using a multi-technique approach that includes synchrotron radiation X-ray diffraction, scanning electron microscopy, micro Raman spectroscopy, photoelectron spectroscopy and conductive atomic force microscopy we reveal the balance between selective Li extraction and structural damage. We identify three different delithiation regimes, related to surface processes, bulk delithiation and damage generation. We find that only a fraction of the grains is affected by the delithiation process, which may create local inhomogeneities. However, the bulk delithiation regime is effective to delithiate the LCO film. All experimental evidence collected indicates that the delithiation process in this regime mimics the behavior of LCO upon electrochemical delithiation. We discard the formation of Co oxalate during the chemical extraction process. In conclusion, the chemical route to Li extraction provides additional opportunities to investigate delithiation while avoiding the complications associated with electrolyte breakdown and simplifying in-situ measurements.E. SalagreS. QuílezR. de BenitoM. JaafarH. P. van der MeulenE. VascoR. CidE. J. FullerA. A. TalinP. SegoviaE. G. MichelC. PolopNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q E. Salagre S. Quílez R. de Benito M. Jaafar H. P. van der Meulen E. Vasco R. Cid E. J. Fuller A. A. Talin P. Segovia E. G. Michel C. Polop A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
description	Abstract We report on the delithiation of LiCoO2 thin films using oxalic acid (C2H2O4) with the goal of understanding the structural degradation of an insertion oxide associated with Li chemical extraction. Using a multi-technique approach that includes synchrotron radiation X-ray diffraction, scanning electron microscopy, micro Raman spectroscopy, photoelectron spectroscopy and conductive atomic force microscopy we reveal the balance between selective Li extraction and structural damage. We identify three different delithiation regimes, related to surface processes, bulk delithiation and damage generation. We find that only a fraction of the grains is affected by the delithiation process, which may create local inhomogeneities. However, the bulk delithiation regime is effective to delithiate the LCO film. All experimental evidence collected indicates that the delithiation process in this regime mimics the behavior of LCO upon electrochemical delithiation. We discard the formation of Co oxalate during the chemical extraction process. In conclusion, the chemical route to Li extraction provides additional opportunities to investigate delithiation while avoiding the complications associated with electrolyte breakdown and simplifying in-situ measurements.
format	article
author	E. Salagre S. Quílez R. de Benito M. Jaafar H. P. van der Meulen E. Vasco R. Cid E. J. Fuller A. A. Talin P. Segovia E. G. Michel C. Polop
author_facet	E. Salagre S. Quílez R. de Benito M. Jaafar H. P. van der Meulen E. Vasco R. Cid E. J. Fuller A. A. Talin P. Segovia E. G. Michel C. Polop
author_sort	E. Salagre
title	A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
title_short	A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
title_full	A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
title_fullStr	A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
title_full_unstemmed	A multi-technique approach to understanding delithiation damage in LiCoO2 thin films
title_sort	multi-technique approach to understanding delithiation damage in licoo2 thin films
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8c64e14c87be4599a335dec82392a134
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A multi-technique approach to understanding delithiation damage in LiCoO2 thin films

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