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|Title: ||Electrochemical Lithiation Cycles of Gold Anodes Observed by In Situ High-Energy X-ray Diffraction|
|Authors: ||Bach, Philipp|
Romero, Aldo H.
|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.
|ISI #: ||000375810400010|
|Type: ||Journal Contribution|
|Validation: ||ecoom, 2017|
|Appears in Collections: ||Research publications|
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