Chemical compatibility and electrical contact between Ni–Cr–Mo alloy and LaCo0.6Ni0.4O3−δ in intermediate temperature solid oxide fuel cells

Zhang, Wenying; Wang, Fangzhong; Wang, Kaishi; Pu, Jian; Chi, Bo; Li, Jian

doi:10.1016/j.ijhydene.2012.08.135

Cited by 14 publications

(7 citation statements)

References 23 publications

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“…The contact material, as well as, its reaction products should demonstrate an appropriate thermal expansion behavior and high thermochemical and structural stability in the oxidizing cathode environment [8,9]. interactions of these kind of materials with Cr-containing steel interconnects, due to their susceptibility to form phases like Ag 2 CrO 4 , AgCrO 2 , SrCrO 4 , Cr-spinels or Crperovskites, the use of those materials, in most of the cases, are quite effective for improving the electrical contact between the cathodes and metallic interconnects [11][12][13][14][15]. In this study, (La 0.8 Sr 0.2 ) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC) are selected for their use as contact layers, for intermediate temperature (IT-SOFC, 600-800 ºC), due to their adequate sintering activity, electrical conductivity and thermal expansion coefficient (TEC).…”

Section: Introductionmentioning

confidence: 99%

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Morán-Ruiz

Vidal

Laguna‐Bercero

et al. 2014

Journal of Power Sources

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Three lanthanum-based perovskite ceramic compounds as contact materials, (La 0.8 Sr 0.2) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC), were coated on Crofer22APU interconnect and then, La 0.6 Sr 0.4 FeO 3 (LSF) cathode was deposited on each of contact layers, using in both contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system.

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Section: Introductionmentioning

confidence: 99%

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Morán-Ruiz

Vidal

Laguna‐Bercero

et al. 2014

Journal of Power Sources

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“…Specifically, the term compatibility itself is used in several studies such as by Zhang et al [ 22 ] which implies that chemical compatibility between the Ni–Cr–Mo interconnectors and LaCo 0.6 Ni 0.4 O 3−δ (LCN) electrodes occurs if no reaction is found between the interconnectors and electrodes on SOFC which is analyzed through X‐ray diffraction (XRD) results. This was confirmed by Gil et al [ 23 ] who claimed that chemical compatibility occurs if no new phases are found that originate from the reaction between the electrode and electrolyte.…”

Section: Overview Of Sofc Cell Compatibilitymentioning

confidence: 99%

Figure‐of‐Merit Compatibility of Solid Oxide Fuel Cells

et al. 2023

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Solid oxide fuel cell (SOFC) is one of the most efficient energy converters which can produce electricity from reactions of gaseous chemicals. However, a high operating temperature (T o) of 800–1200 °C is required to achieve the highest peak performance. Such high T o triggers miscellaneous problems, that is, mechanical disintegration with further degradation of its electrical performance for a long‐term application. Despite accomplishing various approaches for the improvement of SOFC performance, the standard level to determine SOFC performance has never been achieved. To date, a quantitative analysis is only pinpointing the power output density (P out). The SOFC cannot be simply determined by a mere P since other parameters that is chemical stability between SOFC components, mismatch of thermal expansion coefficient, and area‐specific resistance also contribute to the mechanical durability and electrochemical stability of the SOFC. Hence, herein, a novel idea is proposed to characterize the overall performance of SOFC through the figure‐of‐merit compatibility (χ cp) of SOFC cells. The χ cp can reflect a level of SOFC performance, thus it can be utilized for future improvements.

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“…Other materials have also been investigated as candidate contact materials, such as LaNi 0 . 6 Co 0.4 O 3− δ , 7‐10 (La,Sr)(Fe,Co)O 3 ‐based materials, 11 Mn 0 . 9 Y 0 .…”

Section: Introductionmentioning

confidence: 99%

Thermal, mechanical, and electrical properties of LSCo/mullite composite contact materials for solid oxide fuel cells

Chou

Canfield

Bonnett

et al. 2020

Int J Applied Ceramic Tech

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Lanthanum strontium cobaltite (LSCo) is considered as a good candidate cathode contact material for solid oxide fuel cells, due to high electrical conductivity. However, LSCo has a very large coefficient of thermal expansion (CTE) than the cells and metallic interconnects. As a result, poor mechanical stability is expected during thermal cycling. To minimize the CTE mismatch, we investigate a composite approach involving mixing LSCo with an inert material of low CTE, such as mullite at volume fractions from 0.1 to 0.4. Composite's CTE shows a decreasing trend with increasing mullite volume fractions and is consistent with model predictions. X‐ray powder diffraction analysis of sintered LSCo/mullite composites exhibits no presence of other phases for samples aged for 500 hours at 800°C, indicating chemical compatibility. Electrical conductivity by a 4‐pt method shows a decreasing trend with increasing mullite content. Contact strength of as‐sintered and thermally cycled samples show that only the composite with 0.4 volume fraction has a measurable strength; the other composites have no strength. Overall, the composite approach is demonstrated in the LSCo/mullite system to lower the CTE and hence achieve thermal cycle stability. The addition of the inert phase to the LSCo matrix, however, also reduces the electrical conductivity.

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Chemical compatibility and electrical contact between Ni–Cr–Mo alloy and LaCo0.6Ni0.4O3−δ in intermediate temperature solid oxide fuel cells

Cited by 14 publications

References 23 publications

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Figure‐of‐Merit Compatibility of Solid Oxide Fuel Cells

Thermal, mechanical, and electrical properties of LSCo/mullite composite contact materials for solid oxide fuel cells

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