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Electrophoretic deposition of MnCo2O4 coating on solid oxide cell interconnects manufactured through powder metallurgy

Authors :
Elisa Zanchi
Antonio Gianfranco Sabato
Mari Carmen Monterde
Lucile Bernadet
Marc Torrell
José Antonio Calero
Albert Tarancón
Federico Smeacetto
Source :
Materials & Design, Vol 227, Iss , Pp 111768- (2023)
Publication Year :
2023
Publisher :
Elsevier, 2023.

Abstract

Developing cost-effective and durable interconnects for solid oxide cells is crucial to overcome currently existing barriers for the commercialization of this promising energy technology. A systematic microstructural and electrical characterization of MnCo2O4 spinel coatings processed by electrophoretic deposition on SUS 445 ferritic stainless steel, manufactured through powder metallurgy, is here reviewed and discussed for application in high temperature solid oxide cells stacks. The work presents a successful combination of the powder metallurgy processing of metallic interconnects with the electrophoretic deposition as a fast and versatile approach to coat complex interconnect shapes. Therefore, this study assesses the effect of the sintering route of coated steel on the final microstructure. Remarkable results in terms of electrical properties are here presented for EPD coated sample reduced at 1000 °C and re-oxidised at 800 °C in static air, obtaining an area specific resistance degradation rate of 1.2 mΩ cm2/kh together with an effective limitation of Cr outward diffusion despite the prolonged exposure in relevant conditions. This novel approach opens the door for a new class of complex-shaped interconnects with enhanced performance and durability and excellent scalability at a low cost.

Details

Language :
English
ISSN :
02641275
Volume :
227
Issue :
111768-
Database :
Directory of Open Access Journals
Journal :
Materials & Design
Publication Type :
Academic Journal
Accession number :
edsdoj.196d9b1dc3a4955812ca615ffab61f7
Document Type :
article
Full Text :
https://doi.org/10.1016/j.matdes.2023.111768