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Open AccessArticle

Optimization of a Reference Kinetic Model for Solid Oxide Fuel Cells

1
PERT-Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via Opera Pia 15b, 16145 Genoa, Italy
2
Department of Engineering, University of Perugia, Via Duranti 93, 06125 Perugia, Italy
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(1), 104; https://doi.org/10.3390/catal10010104
Received: 16 December 2019 / Revised: 30 December 2019 / Accepted: 8 January 2020 / Published: 10 January 2020
(This article belongs to the Section Electrocatalysis)
Solid oxide fuel cells (SOFCs) stand out among other fuel cell types because of their specific characteristics. The high operating temperature permits to reach optimal conductivity and favours kinetics without requiring noble metal catalysts. The SOFC behaviour analysis is fundamental to optimise operating conditions and to obtain the best performance. For this purpose, specific models are studied to investigate the electrochemical kinetics, which is the most critical aspect in the simulation. This is closely linked to cell materials and structure, as well as to operating conditions (feed composition and temperature above all) that influence cell polarization effects. The present work aims at evaluating these contributions by means of a semi-empirical kinetic formulation based on both theoretical and experimental approaches. A dedicated experimental campaign on an anode-supported NiYSZ/8YSZ/GDC-LSCF button cell is performed to identify experimental parameters. Each working variable is changed singularly to understand its specific effect, avoiding the overlap of multiple effects. The studied kinetics is validated using a 0D model to evaluate global cell operation, and a 1D model to estimate occurring mechanisms along anode thickness. The comparison between experimental and simulated data allows a preliminary validation of the proposed model, providing a base for subsequent more specific studies.
Keywords: anode-supported solid oxide cell; 0D electrochemical kinetic model; button cell experimentation; reacting composition profile anode-supported solid oxide cell; 0D electrochemical kinetic model; button cell experimentation; reacting composition profile
MDPI and ACS Style

Bianchi, F.R.; Bosio, B.; Baldinelli, A.; Barelli, L. Optimization of a Reference Kinetic Model for Solid Oxide Fuel Cells. Catalysts 2020, 10, 104.

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