Preparation and characterization of ceramic interconnect La0.8Ca0.2Cr0.9M0.1O3−δ (M = Al, Co, Cu, Fe) for IT-SOFCs

Fu, Yen−Pei; Wang, Hsin-Chao

doi:10.1016/j.ijhydene.2010.10.057

Cited by 15 publications

(11 citation statements)

References 28 publications

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“…Table 5 Advantages and disadvantages of various fabrication techniques [87][88][89][90][91][92]98]. Table 6 Mechanical properties of various doped Lanthanum chromite materials [110,155,[193][194][195][196][197]. Table 7.…”

Section: Discussionmentioning

confidence: 99%

“…Table 7. Summary -Properties of A and/or B-site doped lanthanum chromite materials [32][33]38,110,[112][113][114][115]120,123,126,[128][129][130][131]134,[139][140][141][142]149,[183][184][185][193][194]. • Expensive (responsible for 15% of the total plant capital cost when integrated with IGCC)…”

Section: Discussionmentioning

confidence: 99%

“…20), resulting into change in conductivity [184]. The mechanical properties (elastic modulus, fracture toughness, fracture strength, and Weibull modulus) of doped lanthanum chromite tend to vary with different dopant type and level at OTM operating conditions (1000°C and 0.21-10 -22 atm) as shown in Table 6 [110,155,[193][194][195][196][197]. It is observed that the flexure strength of the material increases with increase in the level of A-site dopants (Sr and Ca) due to enhanced densification [110,193] [193].…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…• Low density (< 60%) and ionic conductivity Table 5 Advantages and disadvantages of various fabrication techniques [87][88][89][90][91][92]98]. Table 6 Mechanical properties of various doped lanthanum chromite materials [110,155,[193][194][195][196][197]. Table 7 Summary -Properties of A and/or B-site doped lanthanum chromite materials [32][33]38,110,[112][113][114][115]120,123,126,[128][129][130][131]134,[139][140][141][142]149,[183][184][185][193][194].…”

Section: Perovskites Ionic/electronic/mixed Advantages Disadvantages mentioning

confidence: 99%

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Lanthanum chromite based perovskites for oxygen transport membrane

Gupta

Mahapatra

Singh

2015

Materials Science and Engineering: R: Reports

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Judicious selection of mixed ionic-electronic conducting (MIEC) perovskite oxide as oxygen transport membrane (OTM) offers the potential to enhance overall process economics and systems performance for a wide variety of industrial applications ranging from clean and efficient energy conversion (oxy-combustion) to selective gas separation (high purity oxygen production) and value added chemicals (syngas and liquid fuel) production with near-zero greenhouse gas emissions. Doped lanthanum chromite perovskites have been considered as promising material of choice for oxygen transport membrane (OTM) due to their superior thermo-chemical stability in aggressive environment (800-1000°C, 0.21-10-20) than the other mixed ionic-electronic conducting (MIEC) perovskites such as ferrites and cobaltite's. Thermo-physical properties of the lanthanum chromite, required for optimum oxygen transport can be tuned by modifying the crystal structure, chemical

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Electrical Conductivitymentioning

confidence: 99%

Section: Perovskites Ionic/electronic/mixed Advantages Disadvantages mentioning

confidence: 99%

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Lanthanum chromite based perovskites for oxygen transport membrane

Gupta

Mahapatra

Singh

2015

Materials Science and Engineering: R: Reports

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“… and , they revealed that the composition of (La 1− x Ca x )(Cr 1− y Co y )O 3 with x ≥ 0.1 and y ≥ 0.1 can be sintered to theoretical density greater than 94% in air at 1400°C, and the conductivities are increased from 1.5 S/cm for La(Cr 0.9 Co 0.1 )O 3 to 50 S/cm for (La 0.7 Ca 0.3 )(Cr 0.9 Co 0.1 )O 3 . Our previous research found that Fe doping on B‐site of (La 0.8 Ca 0.2 )CrO 3−δ revealed high conductivities in air and in 5%H 2 ‐95% Ar . Therefore, we would like to understand what will happen when Fe doping into the B site besides Co doping.…”

Section: Introductionmentioning

confidence: 97%

Characterizations of Fe Doping on B‐Site of (La_0.8Ca_0.2)(Cr_0.9Co_0.1)O_3−δ Interconnect Materials for SOFCs

Wang

Weng

et al. 2015

J. Am. Ceram. Soc.

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The microstructure, lattice parameters, and electrical conductivity mechanisms for Fe doping on B-site of (La 0.8 Ca 0.2 ) (Cr 0.9 Co 0.1 )O 3 -d were systematically investigated. The oxygen nonstoichiometry was measured by means of thermogravimetry as a function of oxygen partial pressure. In this study, the concept of defect chemistry is used to explain the relationship between the concentration of electron hole with the electrical conductivity. Based on the result of electrical conductivity in air, it is concluded that the concentration of electron hole at high oxygen activity is larger than that at low oxygen activity. This is due to the fact that (La 0.8 Ca 0.2 )CrO 3 -d -based ceramics are p-type conductors, the electrical conductivity is dominated by the concentration of hole. At higher Fe-doping level, the compensation mechanism at high oxygen activity is significantly dominated by the formation of oxygen vacancy, that is, ionic compensation. The compensation mechanism at low oxygen activity is significantly dominated by the formation of the formation of Cr 4+ , that is, electrical compensation at lower Fe-doping level. Based on oxygen nonstoichiometry data, it is found that with increasing Fe-doping amount on B-site of (La 0.8 Ca 0.2 )(Cr 0.9 Co 0.1 )O 3 -d specimens, the initial weight-stable temperature shifted to lower temperature which might be highly related with the change in compensation mechanism at the temperature.

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Interconnect Materials for IT-SOFCs

Shao

Tadé

2016

Green Chemistry and Sustainable Technology

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Preparation and characterization of ceramic interconnect La0.8Ca0.2Cr0.9M0.1O3−δ (M = Al, Co, Cu, Fe) for IT-SOFCs

Cited by 15 publications

References 28 publications

Lanthanum chromite based perovskites for oxygen transport membrane

Lanthanum chromite based perovskites for oxygen transport membrane

Characterizations of Fe Doping on B‐Site of (La_0.8Ca_0.2)(Cr_0.9Co_0.1)O_3−δ Interconnect Materials for SOFCs

Interconnect Materials for IT-SOFCs

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Preparation and characterization of ceramic interconnect La0.8Ca0.2Cr0.9M0.1O3−δ (M = Al, Co, Cu, Fe) for IT-SOFCs

Cited by 15 publications

References 28 publications

Lanthanum chromite based perovskites for oxygen transport membrane

Lanthanum chromite based perovskites for oxygen transport membrane

Characterizations of Fe Doping on B‐Site of (La0.8Ca0.2)(Cr0.9Co0.1)O3−δ Interconnect Materials for SOFCs

Interconnect Materials for IT-SOFCs

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Product

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About

Characterizations of Fe Doping on B‐Site of (La_0.8Ca_0.2)(Cr_0.9Co_0.1)O_3−δ Interconnect Materials for SOFCs