A three-dimensional heterogeneity analysis of electrochemical energy conversion in SOFC anodes using electron nanotomography and mathematical modeling
PBN-AR
Instytucja
Akademickie Centrum Materiałów i Nanotechnologii (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
International Journal of Hydrogen Energy (35pkt w roku publikacji)
ISSN
0360-3199
EISSN
1879-3487
Wydawca
Pergamon-Elsevier Science Ltd.
DOI
Rok publikacji
2018
Numer zeszytu
21
Strony od-do
10016--10030
Numer tomu
43
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
1.07
Autorzy
(liczba autorów: 5)
Pozostali autorzy
+ 4
Słowa kluczowe
EN
SOFC
model
heterogeneity
three-dimensional
pore-scale
micro-scale
Streszczenia
Język
EN
Treść
In this paper a fully three dimensional, multiphase, micro-scale solid oxide fuel cell anode transport phenomena numerical model is proposed and verified. The Butler-Volmer model was combined with empirical relations for conductivity and diffusivity - notably the FullerShetler-Giddings equation, and the Fickian model for transport of gas reagents. FIB-SEM tomography of a commercial SOFC stack anode was performed and the resulting images were processed to acquire input data. A novel method for estimating local values of Triple Phase Boundary length density for use in a three-phase, three-dimensional numerical mesh was proposed. The model equations are solved using an in-house code and the results were verified by comparison to an analytical solution within the range of its applicability. A limited parametric study was performed to qualitatively assess simulation performance and impact of heterogeneity. Despite the high dependence of the SOFC anode performance on the geometry of its anisotropic, three-phase microstructure there are very few micro-scale numerical models simulating transport phenomena within these electrodes. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:114959
CrossrefMetadata from Crossref logo
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