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  Lithiation and delithiation mechanisms of gold thin film model anodes for lithium ion batteries: Electrochemical characterization

Bach, P. J., Stratmann, M., Valencia-Jaime, I., Romero, A. H., & Renner, F. U. (2015). Lithiation and delithiation mechanisms of gold thin film model anodes for lithium ion batteries: Electrochemical characterization. Electrochimica Acta, 164, 81-89. doi:10.1016/j.electacta.2015.02.184.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-BBB7-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-BBB8-D
Genre: Journal Article

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 Creators:
Bach, Philipp Johannes1, 2, 3, Author              
Stratmann, Martin4, 5, Author              
Valencia-Jaime, Irais6, 7, Author              
Romero, Aldo Humberto8, Author              
Renner, Frank Uwe9, 10, Author              
Affiliations:
1Applied and Analytical Chemistry Research Group, Universiteit Hasselt, Belgium, ou_persistent22              
2Center for Electrochemical Sciences - CES, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum, Germany, persistent22              
3Interface Structures and High-Temperature Reactions, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_persistent22              
4Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863348              
5Center for Electrochemical Sciences — CES, Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany, ou_persistent22              
6Centro de Investigación y Estudios Avanzados del IPN, MX, 76230 Querétaro, Mexico, persistent22              
7Physics Department, West Virginia University, WV, 26506-6315 Morgantown, USA, persistent22              
8Departamento de Materiales, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional (CINVESTAV-IPN), 76230 Queretaro, Mexico, ou_persistent22              
9Interface Structures and High-Temperture Reactions, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863359              
10Associated Lab IMEC Division IMOMEC, Diepenbeek, Belgium, ou_persistent22              

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Free keywords: Alloying; Anodes; Cyclic voltammetry; Electric batteries; Electrochemical electrodes; Electrochemistry; Electrodes; Gold; Ionic liquids; Ions; Lithium; Lithium alloys; Lithium compounds; Lithium-ion batteries; Metastable phases; Secondary batteries; Single crystals; Thin films, Electrochemical characterizations; Electrochemical investigations; Energy storage technologies; Galvanostatic Intermittent Titration Techniques; Ionic liquid electrolytes; Lithiation; Potential time curves; Theoretical simulation, Lithium batteries
 Abstract: Lithium Ion batteries have to be significantly improved to fulfill the challenging needs in electromobility or large scale energy storage technology. In this context the use of model electrodes such as single-crystals or thin films allows well-defined mechanistic studies. Here we present a detailed electrochemical investigation of the lithiation-delithiation behavior of Au thin film model electrodes in ionic liquid electrolyte. Cyclic voltammetry, galvanostatic-, stepwise potentiostatic lithiation-delithiation cycles, as well as galvanostatic intermittent titration technique, GITT, measurements were performed. We found nearly identical mechanism of Li insertion and extraction in these three types of measurements at different current levels. The mechanism of alloying or lithiation deviated from the mechanism of dealloying or delithiation. While during the lithiation process two main plateaus related to phase transformations occur in the potential-time curves three main plateaus appear during delithiation. First results of theoretical simulations confirm a high number of possible metastable phases in the Li-Au system. The measurements also point to the influence of SEI-film formation on the cycling behavior. Based on these insights a mechanistic sequence and a phase evolution diagram for the electrochemical alloying of Li with Au are presented. © 2015 Published by Elsevier Ltd.

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Language(s): eng - English
 Dates: 2015-05-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.electacta.2015.02.184
BibTex Citekey: Bach201581
 Degree: -

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Title: Electrochimica Acta
  Abbreviation : Electrochim. Acta
Source Genre: Journal
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Publ. Info: Oxford, UK : Pergamon-Elsevier Science Ltd
Pages: - Volume / Issue: 164 Sequence Number: - Start / End Page: 81 - 89 Identifier: ISSN: 0013-4686
CoNE: /journals/resource/954925396434