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  Electrochemical Lithiation Cycles of Gold Anodes Observed by in Situ High-Energy X-ray Diffraction

Bach, P. J., Valencia-Jaime, I., Rütt, U., Gutowski, O., Romero, A. H., & Renner, F. U. (2016). Electrochemical Lithiation Cycles of Gold Anodes Observed by in Situ High-Energy X-ray Diffraction. Chemistry of Materials, 28(9), 2941-2948. doi:10.1021/acs.chemmater.5b04719.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-B97C-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-B97D-3
Genre: Journal Article

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 Creators:
Bach, Philipp Johannes1, 2, 3, Author              
Valencia-Jaime, Irais4, 5, Author              
Rütt, Uta6, Author              
Gutowski, Olof6, Author              
Romero, Aldo Humberto7, Author              
Renner, Frank Uwe1, 8, 9, Author              
Affiliations:
1Applied and Analytical Chemistry Research Group, Universiteit Hasselt, Belgium, ou_persistent22              
2Interface Structures and High-Temperature Reactions, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_persistent22              
3Center for Electrochemical Sciences - CES, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum, Germany, persistent22              
4Centro de Investigación y Estudios Avanzados del IPN, MX, 76230 Querétaro, Mexico, persistent22              
5Physics Department, West Virginia University, WV, 26506-6315 Morgantown, USA, persistent22              
6DESY, 22603 Hamburg, Germany, ou_persistent22              
7Physics Department, West Virginia University, Morgantown, WV 26506-6315, USA, ou_persistent22              
8Interface Structures and High-Temperture Reactions, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863359              
9Associated Lab IMEC Division IMOMEC, Diepenbeek, Belgium, ou_persistent22              

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Free keywords: Anodes; Electric batteries; Electrodes; Electrolytes; Gold; Ionic liquids; Lithium; Lithium alloys; Lithium-ion batteries; Metastable phases; Phase transitions; Secondary batteries, Crystalline alloys; Electrical energy; Electrochemical lithiation; High energy x-ray diffraction; Ionic liquid electrolytes; Metastable intermediate; Microscopic process; Thermodynamically stable, X ray diffraction
 Abstract: Significant developments of Li-ion batteries will be necessary to cope with the growing demands in electromobility or home storage of (sustainable) electrical energy. A detailed knowledge on the microscopic processes during battery cycling will be increasingly crucial for improvements. Involved phase changes at ambient temperature often involve metastable intermediate states, making both experimental observation and theoretical prediction of process pathways difficult. Here we describe an in situ high energy X-ray diffraction study following the initial alloying and dealloying of Li with an Au thin-film model anode using ionic liquid electrolyte. Six different crystalline alloy phases were observed to be involved in the cyclic phase transitions. Apart from the highest lithiated phase determined in this study, Li3Au, none of the observed phases could be related to known, thermodynamically stable Li-Au phases. Structural search calculations following the minima hopping method (MHM) allowed the assignment of these phases to distinct metastable Au-Li alloy unit cells. © 2016 American Chemical Society.

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Language(s): eng - English
 Dates: 2016-05-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.chemmater.5b04719
BibTex Citekey: Bach20162941
 Degree: -

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Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 28 (9) Sequence Number: - Start / End Page: 2941 - 2948 Identifier: ISSN: 0897-4756
CoNE: /journals/resource/954925561571