title: Nonlinear phase-field model for electrode-electrolyte interface evolution.
abstract: A nonlinear phase-field model is proposed for modeling microstructure evolution during highly nonequilibrium processes. We consider electrochemical reactions at electrode-electrolyte interfaces leading to electroplating and electrode-electrolyte interface evolution. In contrast to all existing phase-field models, the rate of temporal phase-field evolution and thus the interface motion in the current model is considered nonlinear with respect to the thermodynamic driving force. It produces Butler-Volmer-type electrochemical kinetics for the dependence of interfacial velocity on the overpotential at the sharp-interface limit. At the low overpotential it recovers the conventional Allen-Cahn phase-field equation. This model is generally applicable to many other highly nonequilibrium processes where linear kinetics breaks down.
authors.affiliation: Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. lul22@psu.edu
authors.forename: Linyun
authors.initials: L
authors.lastname: Liang
authors.forename: Yue
authors.initials: Y
authors.lastname: Qi
authors.forename: Fei
authors.initials: F
authors.lastname: Xue
authors.forename: Saswata
authors.initials: S
authors.lastname: Bhattacharya
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Harris
authors.forename: Long-Qing
authors.initials: LQ
authors.lastname: Chen
mesh_terms: D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry*; D004574:Electromagnetic Fields; D004595:Electroplating / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D017711:Nonlinear Dynamics; D044367:Phase Transition; D013499:Surface Properties
chemical_list: D004573:Electrolytes