Electrochemical modeling of intercalation processes with phase field models

B. C. Han, A. Van Der Ven, D. Morgan, G. Ceder

Research output: Contribution to journalArticle

156 Citations (Scopus)

Abstract

In this paper, we apply phase field models to move beyond Fick's law in describing Li diffusion in secondary battery electrodes. Phase field models are potentially more accurate and allow simpler tracking of phase boundaries than Fick's equation. The phase field models are implemented using the highly accurate but fast Chebyshev-spectral method. Using the phase field we investigate to what extent non-Fickian behavior can affect results from experimental techniques for measuring diffusion coefficients, such as Galvanostatic Intermittent Titration Technique (GITT) and Potentiostatic Intermittent Titration Technique (PITT). We show that GITT and PITT can still accurately measure the diffusion coefficient in systems described by phase field models even when significant gradient energy terms are present.

Original languageEnglish
Pages (from-to)4691-4699
Number of pages9
JournalElectrochimica Acta
Volume49
Issue number26
DOIs
Publication statusPublished - 2004 Oct 15

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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