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Cerium silicate-based thin-film apatites: high conductivity and solid oxide fuel cell application

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Abstract

We report on the intermediate-temperature synthesis (973 K) and operation (<750 K) of Ce4.67(SiO4)3O-based thin-film oxy-apatites. The apatite thin films show the high conductivity of ~0.05–0.5 S/cm and excellent stability in reducing atmosphere (<10−17 atm), which makes promising these materials as anodes for intermediate-temperature solid oxide fuel cell (SOFC) application. The proto-type SOFCs implementing single-layer apatite and apatite/Pt bilayer anodes were fabricated and the resulting performance (e.g., peak power density of ∼5 mW/ cm2 at 748 K) presents notable feasibility of ZCS-based oxy-apatite anodes for thin-film SOFC devices.

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Acknowledgments

This work was supported by the Baylor University faculty start-up funds.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Baylor University, Waco, TX, 76798, USA

    Sunghwan Lee

  2. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA

    Sunghwan Lee & Xiaofei Guan

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  1. Sunghwan Lee
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  2. Xiaofei Guan
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Correspondence to Sunghwan Lee.

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Lee, S., Guan, X. Cerium silicate-based thin-film apatites: high conductivity and solid oxide fuel cell application. MRS Communications 7, 199–205 (2017). https://doi.org/10.1557/mrc.2017.24

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