On the Fundamental and Practical Aspects of Modeling Complex Electrochemical Kinetics and Transport

Andrew Colclasure, Robert Kee, Peter Weddle, Steven DeCaluwe, Huayang Zhu, Wolfgang Bessler, Gregory Jackson

Research output: Contribution to journalArticlepeer-review

25 Scopus Citations

Abstract

Numerous technologies, such as batteries and fuel cells, depend on electrochemical kinetics. In some cases, the responsible electrochemistry and charged-species transport is complex. However, to date, there are essentially no general-purpose modeling capabilities that facilitate the incorporation of thermodynamic, kinetic, and transport complexities into the simulation of electrochemical processes. A vast majority of the modeling literature uses only a few (often only one) global charge-transfer reactions, with the rates expressed using Butler–Volmer approximations. The objective of the present paper is to identify common aspects of electrochemistry, seeking a foundational basis for designing and implementing software with general applicability across a wide range of materials sets and applications. The development of new technologies should be accelerated and improved by enabling the incorporation of electrochemical complexity (e.g., multi-step, elementary charge-transfer reactions and as well as supporting ionic and electronic transport) into the analysis and interpretation of scientific results. The spirit of the approach is analogous to the role that Chemkin has played in homogeneous chemistry modeling, especially combustion. The Cantera software, which already has some electrochemistry capabilities, forms the foundation for future capabilities expansion.

Original languageAmerican English
Pages (from-to)E637-E658
JournalJournal of the Electrochemical Society
Volume165
Issue number13
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 The Electrochemical Society.

NREL Publication Number

  • NREL/JA-5400-71849

Keywords

  • Butler-Volmer kinetics
  • Cantera
  • Faradaic and ohmic heating
  • general-purpose software
  • ion and electron transport
  • Marcus theory

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