Open AccessImproved Robustness and Low Area Specific Resistance with Novel Contact Layers for the Solid Oxide Cell Air Electrode
Author(s) -
Belma Talic,
Ilaria Ritucci,
Ragnar Kiebach,
Peter Vang Hendriksen,
Henrik Lund Frandsen
Publication year - 2019
Publication title -
ecs transactions
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.235
H-Index - 52
eISSN - 1938-6737
pISSN - 1938-5862
DOI - 10.1149/09101.2225ecst
Subject(s) - materials science , contact resistance , stacking , oxide , electrode , spinel , stack (abstract data type) , composite material , layer (electronics) , electrical contacts , interconnection , temperature cycling , contact area , solid oxide fuel cell , metal , thermal , metallurgy , chemistry , computer network , meteorology , computer science , programming language , anode , physics , organic chemistry
Stacking of solid oxide cells (SOC) requires that a robust and durable electrical contact between the cell and the interconnect is established. In this work we present a new contact layer solution for the SOC air side, based on the concept of reactive oxidative bonding. The contact layer consists of metallic Mn-Co and Mn-Cu particles that during initiation/operation are oxidized in-situ to form well-conductive spinel oxides. The long-term (3000 h) stability of the new contact layers is evaluated by measuring the area specific resistance (ASR) during aging in air at 750 °C, and during thermal cycling. Both Mn-Co and Mn-Cu layers are found to be well compatible with the applied CeCo coated 441 steel, and do not significantly contribute to the resistance across the stack element, which is dominated by the coated steel.
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