Comparison of iron and copper doped manganese cobalt spinel oxides as protective coatings for solid oxide fuel cell interconnects

Talic, Belma; Molin, Sebastian; Wiik, Kjell; Hendriksen, Peter Vang; Lein, Hilde Lea

doi:10.1016/j.jpowsour.2017.10.060

Cited by 99 publications

(75 citation statements)

References 58 publications

(85 reference statements)

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“…This suggests that in order to lower the ASR reducing the oxidation rate of the alloy is more important than increasing the conductivity of the coating material. We have previously shown that the MC, Fe3 and Cu3 materials result in nearly the same ASR after more than 4000 h oxidation at 800 °C when applied as a coating on Crofer 22 APU [28,30].…”

Section: Suitability As Sofc Interconnect Coating Materialsmentioning

confidence: 90%

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Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

et al. 2018

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Manganese cobalt spinel oxides are promising coating materials for corrosion protection of metallic interconnects in solid oxide fuel cell stacks. This work investigates how Fe and Cu doping affect the crystal structure, thermal expansion and electrical conductivity of the MnCo2-xMxO4 (M=Cu, Fe; x = 0.1, 0.3, 0.5) spinel oxides. Single phase cubic spinels were successfully prepared by spray pyrolysis. The electrical conductivity between room temperature and 1000 °C increased with addition of Cu and decreased with addition of Fe. The thermal expansion coefficient (TEC) between 50 and 800 °C decreased from 14.4 to 11.0×10-6 K-1 going from MnCo2O4 to MnCo1.5Fe0.5O4. The TEC of the Cu substituted materials did not follow any obvious trend with composition and was likely influenced by precipitation of CuO during heating. Based on their physical properties, the Fe doped materials are the most attractive for application as SOFC interconnect coatings.

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Section: Suitability As Sofc Interconnect Coating Materialsmentioning

confidence: 90%

“…The most widely studied compositions in this system are Mn1.5Co1.5O4 and MnCo2O4. Although these materials are not stable under the reducing conditions found on the anode side of the SOFC, they are considered promising coatings for the cathode side, where they limit Cr-volatilization and reduce the oxidation rate of the FSS [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

et al. 2018

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“…With regards to the coating materials, spinel coatings have received significant attention [9,10]. Different spinel compositions have been analysed to find optimal protective-conductive layers for SOFC interconnects with low oxidation rate, low contact resistance, low electrical resistance, high adhesion, and, above all, low release rates of chromium [11][12][13]. Larring and Norby proposed (Mn, Co)3O4 as the promising candidate for the protective layer application for metallic SOFC interconnects (CFY alloy) [14].…”

Section: Different Coating Techniques Can Be Broadly Classified As Vamentioning

confidence: 99%

Formulation of spinel based inkjet inks for protective layer coatings in SOFC interconnects

Pandiyan

Steinberger‐Wilckens

2020

Journal of Colloid and Interface Science

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“…At room temperature, spinel (Mn, Co)3O4 consists of a mixture between the tetragonal structure Mn2CoO4 and cubic structure MnCo2O4 phases. During heat treatment, the temperature increase around 400 °C makes the cubic structure stable [8,25,26,55,56]. Thus, under working conditions of SOFC's, around 800 °C, the only structure present is the cubic.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Obtaining Mn-Co Alloys in AISI 430 Steel from Lithium-Ion Battery Recycling: Application in SOFC Interconnectors

et al. 2020

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The recycling of exhausted lithium-ion batteries from mobile phones originate five solutions with different Co and Mn proportions that were used as electrolytic solutions to obtain Mn-Co spinel coatings on the surface of AISI430 stainless steel. The coatings are intended to contain chromium volatility in the working conditions of Solid Oxide Fuel Cells (SOFC) metallic interconnectors. Potentiostatic electrodeposition was the technique used to obtain Mn-Co coatings from low concentration electrolytes at pH = 3.0 and potential applied −1.3 V. Charge efficiency data were used for sample optimization. Three optimized samples were subjected to oxidation heat treatment at 800 °C for 300 h and then characterized by XRD, SEM and EDS. The results showed that the addition of manganese ions instead of cobalt ions in the electrolytic bath produces more stable and well-distributed deposits as the ratio of the two ions becomes equal in the electrolytic bath. Thin, homogeneous and stable spinel coatings (Mn, Co)3O4 2.8 μm and 3.9 μm thick were able to block chromium volatility when exposed to SOFC operating temperature.

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Comparison of iron and copper doped manganese cobalt spinel oxides as protective coatings for solid oxide fuel cell interconnects

Cited by 99 publications

References 58 publications

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

Formulation of spinel based inkjet inks for protective layer coatings in SOFC interconnects

Obtaining Mn-Co Alloys in AISI 430 Steel from Lithium-Ion Battery Recycling: Application in SOFC Interconnectors

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