Dynamic electrochemical model for SOFC-stacks

D. Klotz, A. Weber, E. Ivers-Tiffée

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A dynamic electrochemical model based on an equivalent circuit model for anode supported cells (ASC) was developed further to the stack plane level. The model parameters were identified from experimental ASC data (iv-curves and EIS) followed by a pre-identification via the distribution of relaxation times (DRT) and a Complex Nonlinear Least Squares fit (CNLS-fit). The dynamic electrochemical stack model allows separating the contributions of (i) ohmic resistance, (ii) gas phase polarisation (anode substrate), (iii) electrochemistry in the anode functional layer and (iv) oxygen reduction reaction (cathode) as a function of operating voltage and fuel gas composition along the gas channel. As a conclusion, the stack impedance and the static and dynamic current density distribution can be simulated on a stack plane level for a broad range of operating conditions.

Original languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages1331-1340
Number of pages10
Edition2 PART 2
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: Oct 4 2009Oct 9 2009

Publication series

NameECS Transactions
Number2 PART 2
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
CountryAustria
CityVienna
Period10/4/0910/9/09

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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