Double Perovskites as Anode Materials for Solid‐Oxide Fuel Cells.

Huang, Yunhui; Dass, Ronald I.; Xing, Zhengliang; Goodenough, John B.

doi:10.1002/chin.200628016

Cited by 119 publications

(180 citation statements)

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“…The small-polaron formula · = (A/T)exp(¹E a / kT) can be introduced to describe the temperature dependence of · over the whole applied temperature range, 573¯T¯973 K. In the formula, A, T and k represent the pre-exponential factor, absolute temperature and Boltzmann's constant, respectively, and E a = "Hm + ("Ht/2) is the sum of the polaron motional enthalpy "Hm and the enthalpy "Ht to free a polaron from the oxygen vacancy that creates it. 10) According to the experimental data obtained in air, the Arrhenius plots [ln(·T) vs T…”

Section: ¹1mentioning

confidence: 99%

Conducting mechanism of Sr2CoRO6 (R=Mo, Nb) under different PO2

Lin

et al. 2016

J. Ceram. Soc. Japan

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The electrical conductivities of Sr 2 CoRO 6 (R=Mo, Nb) under different oxygen partial pressures and their crystal structures were investigated. Their conducting mechanisms were proposed. X-ray photoelectron spectra revealed that the dominated oxidation state of Co 2+ was in Sr 2 CoMoO 6 but Co 3+ in Sr 2 CoNbO 6 . The crystal lattice structures of Sr 2 CoRO 6 were identified by X-ray diffraction and their parameters were calculated by using Rietveld method. The refined crystal structures of Sr 2 CoRO 6 have been used to construct their own conducting channel model. And the electrical conductivities were measured by using an electrochemical workstation with four-terminals method through controlling the oxygen partial pressure of the testing environment. The results show that the electrical conductivity of Sr 2 CoMoO 6 is 0.36 S·cm ¹1, much lower than that of Sr 2 CoNbO 6 (7.81 S·cm ¹1) in air at 973 K, which is assigned to the difference of their conducting channels. And the electrical conductivity of Sr 2 CoMoO 6 increased linearly with the decrease in P O2 , reaching 2.05 S·cm ¹1 when P O2 = 10 ¹21 atm at 973 K, while Sr 2 CoNbO 6 presented an opposite trend. It was supposed that the different valences of cobalt in Sr 2 CoMoO 6 and Sr 2 CoNbO 6 lead to the different electron conducting channels and different changing trends of electrical conductivities with the decrease in oxygen partial pressure.

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Section: ¹1mentioning

confidence: 99%

Conducting mechanism of Sr2CoRO6 (R=Mo, Nb) under different PO2

Lin

et al. 2016

J. Ceram. Soc. Japan

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“…Goodenough's group [166][167][168] has prepared and tested a new double-perovskite containing manganese and molybdenum (Sr 2 MgMoO 6-d , SMMO) with an LSGM electrolyte. This composition showed superior performance and stability in both hydrogen and methane [166,167], and was sulfur tolerant [168].…”

Section: Mixed-conductor Oxides Anodesmentioning

confidence: 99%

Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes

2009

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Solid oxide fuel cells (SOFC) have the advantage of being able to operate with fuels other than hydrogen. In particular, liquid fuels are especially attractive for powering portable applications such as small power generators or auxiliary power units, in which case the direct utilization of the fuel would be convenient. Although liquid fuels are easier to handle and transport than hydrogen, their direct use in SOFC can lead to anode deactivation due to carbon formation, especially on traditional nickel/yttria stabilized zirconia (Ni/YSZ) anodes. Significant advances have been made in anodic materials that are resistant to carbon formation but often these materials are less electrochemically active than Ni/YSZ. In this review the challenges of using liquid fuels directly in SOFC, in terms of gas-phase and catalytic reactions within the anode chamber, will be discussed and the alternative anode materials so far investigated will be compared.

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“…To address this issue, two major approaches have been considered: using alternative anode materials with a high coking tolerance or co-feeding the fuel with a high concentration of oxidizing agents such as air, CO 2 , or water. [14][15][16][17][18][19] In our previous work we successfully produced a novel MoO 2 -based anode with an exceptionally high coking resistance for liquid hydrocarbons such as n-dodecane and biodiesel at an operating temperature of 850 8C. [20] The procedure developed in our group, which is based on the electrostatic spray deposition (ESD) method, has opened up the possibility of developing liquid hydrocarbon-fueled SOFCs.…”

mentioning

confidence: 99%

Retraction: High‐Performance Molybdenum Dioxide‐Based Anode for Dodecane‐Fueled Solid‐Oxide Fuel Cells (SOFCs)

Kwon¹,

Hu²,

Marin‐Flores³

et al. 2017

Energy Tech

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Double Perovskites as Anode Materials for Solid‐Oxide Fuel Cells.

Cited by 119 publications

References 1 publication

Conducting mechanism of Sr<sub>2</sub>CoRO<sub>6</sub> (R=Mo, Nb) under different <i>P</i><sub>O2</sub>

Conducting mechanism of Sr<sub>2</sub>CoRO<sub>6</sub> (R=Mo, Nb) under different <i>P</i><sub>O2</sub>

Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes

Retraction: High‐Performance Molybdenum Dioxide‐Based Anode for Dodecane‐Fueled Solid‐Oxide Fuel Cells (SOFCs)

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