Nonlinear phase-field model for electrode-electrolyte interface evolution

Linyun Liang, Yue Qi, Fei Xue, Saswata Bhattacharya, Stephen J. Harris, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

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.

Original languageEnglish (US)
Article number051609
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume86
Issue number5
DOIs
StatePublished - Nov 26 2012

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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