Synthesis and Evaluation of LaBaCo[sub.2−x]MoIx/IO[sub.5+δ] Cathode for Intermediate-Temperature Solid Oxide Fuel Cells

LaBaCo[sub.2−x] MoxO[sub.5+δ] (LBCMx, x = 0–0.08) cathodes synthesized by a sol-gel method were evaluated for intermediate-temperature solid oxide fuel cells. The limit of the solid solubility of Mo in LBCMx was lower than 0.08. As the content of Mo increased gradually from 0 to 0.06, the thermal ex...

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Veröffentlicht in:Materials 2022-08, Vol.15 (17)
Hauptverfasser: He, Shoucheng, Zhang, Lanqing, Cai, Jiantao, Wu, Xingyu, Sun, Hanxi, Du, Tao
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creator He, Shoucheng
Zhang, Lanqing
Cai, Jiantao
Wu, Xingyu
Sun, Hanxi
Du, Tao
description LaBaCo[sub.2−x] MoxO[sub.5+δ] (LBCMx, x = 0–0.08) cathodes synthesized by a sol-gel method were evaluated for intermediate-temperature solid oxide fuel cells. The limit of the solid solubility of Mo in LBCMx was lower than 0.08. As the content of Mo increased gradually from 0 to 0.06, the thermal expansion coefficient decreased from 20.87 × 10[sup.−6] K[sup.−1] to 18.47 × 10[sup.−6] K[sup.−1] . The introduction of Mo could increase the conductivity of LBCMx, which varied from 464 S cm[sup.−1] to 621 S cm[sup.−1] at 800 °C. The polarization resistance of the optimal cathode LBCM0.04 in air at 800 °C was 0.036 Ω cm[sup.2] , reduced by a factor of 1.67 when compared with the undoped Mo cathode. The corresponding maximum power density of a single cell based on a YSZ electrolyte improved from 165 mW cm[sup.−2] to 248 mW cm[sup.−2] at 800 °C.
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The limit of the solid solubility of Mo in LBCMx was lower than 0.08. As the content of Mo increased gradually from 0 to 0.06, the thermal expansion coefficient decreased from 20.87 × 10[sup.−6] K[sup.−1] to 18.47 × 10[sup.−6] K[sup.−1] . The introduction of Mo could increase the conductivity of LBCMx, which varied from 464 S cm[sup.−1] to 621 S cm[sup.−1] at 800 °C. The polarization resistance of the optimal cathode LBCM0.04 in air at 800 °C was 0.036 Ω cm[sup.2] , reduced by a factor of 1.67 when compared with the undoped Mo cathode. 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source PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry
subjects Barium compounds
Cathodes
Chemical properties
Chemical synthesis
Equipment and supplies
Fuel cells
Lanthanum
Materials
Methods
Molybdenum compounds
Production processes
title Synthesis and Evaluation of LaBaCo[sub.2−x]MoIx/IO[sub.5+δ] Cathode for Intermediate-Temperature Solid Oxide Fuel Cells
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