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

Published online by Cambridge University Press:  20 April 2017

Sunghwan Lee Open the ORCID record for Sunghwan Lee [Opens in a new window]  and
Xiaofei Guan
Sunghwan Lee*
Affiliation:
Department of Mechanical Engineering, Baylor University, Waco, TX 76798, USA John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
Xiaofei Guan
Affiliation:
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
*
Address all correspondence to Sunghwan Lee at Sunghwan_Lee@baylor.edu
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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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Type
Research Letters
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MRS Communications , Volume 7 , Issue 2 , June 2017 , pp. 199 - 205
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Copyright © Materials Research Society 2017 

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