Evolution of microstructure during annealing of Mn1.5Co1.5O4 spinel coatings deposited by atmospheric plasma spray

Hu, Ying-Zhen; Li, Chang-Jiu; Yang, Guan–Jun; Li, Chang‐Jiu

doi:10.1016/j.ijhydene.2014.02.138

Cited by 23 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there remain several issues for Cr-containing metallic interconnects during the long-term operation of SOFCs at elevated temperatures, including oxidation and Cr diffusion/evaporation. , The oxidation of the interconnect decreases its electrical conductivity and reduces its lifetime. The evaporation of volatile Cr species exacerbates the loss of Cr in the interconnect and poisons the cathode to decrease oxygen reduction reaction (ORR) sites .…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Shen

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In this work, a novel Co/Sm-doped CeO (SDC)/Co trilayer of ∼6 μm is deposited by alternating electrodeposition and electrophoresis and oxidized to a CoO/SDC/CoO trilayer structure. This coating is unique and effective in the following aspects: (1) The area specific resistance of the coated interconnect is more stable and lower than that of the uncoated interconnect after thermal treatment at 800 °C for 400 h. (2) The CoO/SDC/CoO coating layer can effectively inhibit Cr diffusion and evaporation and significantly slow the oxidation rate of the interconnect. (3) The SmSrCoFeO cathode in the electrolyte/cathode/interconnect half-cell retains its initial stoichiometry after 100 h of the thermal treatment. Subsequently, the ohmic resistance R, high frequency polarization resistance R, and low frequency polarization resistance R of the half-cell with the CoO/SDC/CoO coated interconnect are all smaller than those of the half-cell with the bare interconnect. The CoO/SDC/CoO coating layer has great advantages to be used as a protective layer for the metallic interconnect in solid oxide fuel cells to improve cell performance, stability, and durability.

show abstract

Section: Introductionmentioning

confidence: 99%

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Shen

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Microstructural changes occurred in all coated samples, which brought to a densification of the layers as observed by Hu et al for the Co 1.5 Mn 1.5 O 4 spinel 16. Such densification is reflected by the changes measured in the electrical behaviour and is affected by the composition of the coatings as shown in Figure 9.…”

Section: Resultsmentioning

confidence: 51%

“…Besides the high efficiency and industrial scalability of such techniques, other advantages are the possibility to use several kinds of feedstock and the high reproducibility of sprayed layers 15. Plasma spraying has been already applied for the deposition of cobalt manganese oxide and other spinels 16, 17. However, as no documentation about plasma sprayed Cu x Mn 3–x O 4 coatings were found in literature, this material should be considered the core of the present work.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Electrical Characterization of Plasma Sprayed Cu‐Mn Oxide Spinels as Coating on Metallic Interconnects for Stacking Solid Oxide Fuel Cells

et al. 2015

View full text Add to dashboard Cite

Interconnect coatings are extremely important to ensure an optimal performance of a solid oxide fuel cell (SOFC) stack. Nowadays the most common material used to produce SOFC interconnects is a ferritic stainless steel (FSS) rich in chromium which is much less expensive than the previously used ceramic interconnects. Nevertheless interconnects have to be coated in order to provide protection from the aggressive environment that surrounds them and reduce chromium species migration to the cell's cathode. In this work three different coatings were applied to Crofer 22 H substrates via atmospheric plasma spraying (APS): two different stoichiometries of copper manganese oxide (Cu x Mn 3-x O 4 , where x = 1.4 and 1.5) and one of cobalt manganese oxide (Co x Mn 3-x O 4 , where x = 1.5), considered the state of the art coating for SOFC interconnects. X-ray diffraction (XRD) was used to check the composition of deposited layers. Area specific resistance (ASR) of samples has been characterized for different samples in the range 673-1,073 K and during a 100 hours ageing test at 1,073 K. Microstructural changes and Cr-barrier properties have been characterized by SEM-EDX analyses.

show abstract

“…Numerous studies reported that Mn-Co oxide spinel has high electrical conductivity, good oxidation resistance, and low chromium volatilization [18][19][20][21][22][23][24]. Various deposition methods have been proposed to apply Mn-Co oxide spinel on the surface of metallic interconnects, such as slurry coating [18,25], sol-gel [26][27][28], plasma spray [29][30][31], electrophoretic deposition [32][33][34], and electrodeposition [10,11,[35][36][37][38][39][40]. Among the deposition methods above, the electrodeposition method is attractive for its economy and feasibility.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Mn–Co Alloys Electrodeposited on AISI 430 Ferritic Stainless Steel for SOFC Interconnect Applications

Thanedburapasup

Wetchirarat

Muengjai

et al. 2023

Metals

View full text Add to dashboard Cite

Mn–Co alloys were electroplated on AISI 430 stainless steel using an electrodeposition technique with the aim to reduce oxidation and chromium volatilization. The electroplating parameters were designed to improve the coating quality. The increased current density with decreased MnSO4 content resulted in a denser coating layer. A sample coated with 0.10 M CoSO4 and 0.50 MnSO4 at 350 mA cm−2 showed the best oxidation resistance after being oxidized at 800 °C for 90 h. The X-ray diffraction (XRD) result revealed that the oxide growth on the surface of the coated samples mainly formed oxides of MnCo2O4, MnCr2O4, and Cr2O3. The chromium volatilization was evaluated by exposing the coated samples to humidified synthetic air at 800 °C for 96 h. The mass flux of Cr volatilization was on the order of 10−11 g cm−2 s−1. Furthermore, different heat treatments in O2 and CO2 atmospheres were compared. Annealing in CO2 at 800 °C for 4 h helped increase the Mn–Co coating density. The relationship between the porosity and its failure behavior was also discussed.

show abstract

Evolution of microstructure during annealing of Mn1.5Co1.5O4 spinel coatings deposited by atmospheric plasma spray

Cited by 23 publications

References 26 publications

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Microstructural and Electrical Characterization of Plasma Sprayed Cu‐Mn Oxide Spinels as Coating on Metallic Interconnects for Stacking Solid Oxide Fuel Cells

Fabrication of Mn–Co Alloys Electrodeposited on AISI 430 Ferritic Stainless Steel for SOFC Interconnect Applications

Contact Info

Product

Resources

About

Evolution of microstructure during annealing of Mn1.5Co1.5O4 spinel coatings deposited by atmospheric plasma spray

Cited by 23 publications

References 26 publications

Co3O4/Sm-Doped CeO2/Co3O4 Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co3O4/Sm-Doped CeO2/Co3O4 Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Microstructural and Electrical Characterization of Plasma Sprayed Cu‐Mn Oxide Spinels as Coating on Metallic Interconnects for Stacking Solid Oxide Fuel Cells

Fabrication of Mn–Co Alloys Electrodeposited on AISI 430 Ferritic Stainless Steel for SOFC Interconnect Applications

Contact Info

Product

Resources

About

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells