Reduction electrochimique de MnCo2O4 prepare a basse et haute temperature

Gautier, J.L.; Cabezas, Carlos; Barrato, S.

doi:10.1016/0013-4686(81)90005-0

Cited by 21 publications

(10 citation statements)

References 12 publications

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“…18-0408) phases at room temperature. MnCo 2 O 4 is a normal cubic spinel with Mn occupying octahedral interstitial sites and Co at [15,32,33]. This observation is consistent with earlier work by Naka et al [34] showing the co-existence of the cubic-and the tetragonal-spinel for Mn 1þd Co 2Àd O 4 with 0.3 d 0.9.…”

Section: Powder Characteristicssupporting

confidence: 90%

Synthesis and characterization of the manganese cobaltite spinel prepared using two “soft chemical” methods

Brylewski

Kruk

Adamczyk

et al. 2012

Materials Chemistry and Physics

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Section: Powder Characteristicssupporting

confidence: 90%

Synthesis and characterization of the manganese cobaltite spinel prepared using two “soft chemical” methods

Brylewski

Kruk

Adamczyk

et al. 2012

Materials Chemistry and Physics

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“…MnCo2O4 prepared below ca. 500-600°C is reported to be cation deficient, with a smaller lattice parameter compared to the stoichiometric material [34,[40][41][42][43][44]. Comparing the value for the MC powder calcined at 650 °C (8.233 Å) with the value given in PDF 23-1237 for presumably stoichiometric MnCo2O4 prepared at 720 °C (8.269 Å) indicates that the as-prepared powder is slightly cation deficient.…”

Section: Crystal Structurementioning

confidence: 87%

“…More recently it has been shown that preparation of MnCo2O4 below ca. 500-600°C yields a cation deficient spinel having a smaller lattice parameter compared to the stoichiometric material [34,[40][41][42][43][44]. For convenience, the cation deficiency is often designated as an excess of oxygen, i.e.…”

Section: Introductionmentioning

confidence: 99%

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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“…where R is electrical resistance [18,27,28]. Since cobalt and manganese cannot be distinguished using X-rays, refinements were made with 50 % of Co and Mn at each crystallographic site.…”

Section: Methods Of Sample Characterizationmentioning

confidence: 99%

Mn–Co spinel protective–conductive coating on AL453 ferritic stainless steel for IT-SOFC interconnect applications

Kruk

Stygar

Brylewski

2012

J Solid State Electrochem

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This paper presents research on the synthesis and properties of the Mn 1.5 Co 1.5 O 4 (MC) spinel powder, as well as its application for the preparation of a MC thick film on the AL453 steel to be used for metallic interconnect material in IT-SOFCs. In order to prepare the MC micropowder with excellent homogeneity of the chemical and phase compositions, EDTA gel processes were utilized. In order to improve the contact electrical resistance between an AL453 steel interconnect and the La 0.8 Sr 0.2 FeO 3 (LSF) cathode and protect the cathode from Cr poisoning, the surface of the AL453 steel was coated with a protective manganese cobaltite spinel matrix using screen printing in combination with an appropriate heat treatment. The oxidation of the AL453/MC composite layer carried out in the air-H 2 O gas mixture at 1,073 K for 55 h showed that the spinel coating may serve as an effective barrier against outward Cr diffusion from the AL453 steel and, therefore, significantly inhibit the formation of volatile Cr vapors from the chromia scale. The contact ASR study of the interconnect-cathode interface in the AL453/MC/LSCM/LSF/LSCM/MC/AL453 system carried out in the range of 723−1,073 K in air showed a very large drop in ASR compared to the resistance of the AL453/LSCM/LSF/LSCM/AL453 system without the spinel coating.

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Reduction electrochimique de MnCo2O4 prepare a basse et haute temperature

Cited by 21 publications

References 12 publications

Synthesis and characterization of the manganese cobaltite spinel prepared using two “soft chemical” methods

Synthesis and characterization of the manganese cobaltite spinel prepared using two “soft chemical” methods

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

Mn–Co spinel protective–conductive coating on AL453 ferritic stainless steel for IT-SOFC interconnect applications

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