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Low-temperature co-sintering of co-ionic conducting solid oxide fuel cells based on Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9 composite electrolyte

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Abstract

A composite electrolyte Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9 (SDC-BCS) material for co-ionic conducting solid oxide fuel cells was prepared by microwave-assisted sol-gel technique. The crystallization, morphology, and sintering characteristics were investigated by X-ray diffraction and scanning electron microscopy. The obtained SDC-BCS composite electrolyte powders distribute uniformly, and SDC and BCS crystalline grains play a role as matrix for each other in the composite electrolyte. Anode-supported solid oxide fuel cells of NiO-Ce0.8Sm0.2O1.9/Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9/Ce0.8Sm0.2O1.9-SrCo0.9Ti0.1O2.55 (NiO-SDC/SDC-BCS/SDC-SCT) were fabricated based on the nanocomposite electrolyte powders. The electrochemical performances were tested at 500–650 °C using humidified hydrogen as fuel. Results demonstrated that the anode-supported half cells could be sintered at 1,300 °C with a dense electrolyte layer and a porous anode structure. Moreover, the single cell with 40-μm-thick electrolyte layer achieved an open-circuit voltage (OCV) of 0.77 V and a maximum power density of 621 mW cm−2 at 650 °C.

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Acknowledgments

The authors would like to thank the financial support from the Chinese Natural Science Foundation on contract Grant Nos. 51102107 and 51202080, Anhui Science and Technology Project (No. 1206c0805038), and Huainan Science and Technology Project (No. 2010A03203).

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Authors and Affiliations

  1. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People’s Republic of China

    Dong Tian & Wei Liu

  2. Anhui Key Laboratory of Low Temperature Co-fired Materials, Department of Chemistry, Huainan Normal University, Huainan, Anhui, 232001, People’s Republic of China

    Dong Tian, Yonghong Chen, Qinwen Gu & Bin Lin

Authors
  1. Dong Tian
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  2. Wei Liu
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  3. Yonghong Chen
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  4. Qinwen Gu
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  5. Bin Lin
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Correspondence to Wei Liu or Bin Lin.

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Tian, D., Liu, W., Chen, Y. et al. Low-temperature co-sintering of co-ionic conducting solid oxide fuel cells based on Ce0.8Sm0.2O1.9-BaCe0.8Sm0.2O2.9 composite electrolyte. Ionics 21, 823–828 (2015). https://doi.org/10.1007/s11581-014-1220-2

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