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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21144

Title: Electrochemical Lithiation Cycles of Gold Anodes Observed by In Situ High-Energy X-ray Diffraction
Authors: Bach, Philipp
Valencia-Jaime, Irais
Rütt, Uta
Gutowski, Olof
Romero, Aldo H.
Renner, Frank
Issue Date: 2016
Citation: CHEMISTRY OF MATERIALS, 28 (9), p. 2941-2948
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 Xray 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.
Notes: Renner, FU (reprint author), Hasselt Univ, Inst Mat Res IMO, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. frank.renner@uhasselt.be
URI: http://hdl.handle.net/1942/21144
DOI: 10.1021/acs.chemmater.5b04719
ISI #: 000375810400010
ISSN: 0897-4756
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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