Multi- and mono-layered thin film electrolytes based on BaCe 0.9Y0.1O3-δ (BCY) and BaZr 0.85Y0.15O3-δ (BZY) ceramics are fabricated by pulsed laser deposition (PLD) for use in micro-protonic ceramic fuel cells (micro-PCFCs), and their microstructure and fuel cell performances are investigated. Fully dense and well-crystallized BCY and BZY layers are identified in the multi- and mono-layered electrolytes, and are confirmed by microstructural analyses. Fuel cell and impedance measurements confirm that the bare BCY cells exhibit superior performance to samples with BZY capping; however, this capping does not offer any advantage in terms of operational stability. In contrast, the BCY-capped BZY cell performs better than the bare BZY cell, implying that BCY possesses more active surface kinetics. Anodic improvement is as important as cathodic modification for the intermediate-temperature operation of PCFCs. The BCY-capped BZY cell also demonstrates excellent stability, maintaining a good open circuit voltage for over 10 h.
Bibliographical noteFunding Information:
The authors are grateful to the Fusion Research Program for Green Technologies of the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science, and Technology (MEST) (Grant No. NRF-2011-0019300 ), and to the Young Fellow Program of Korea Institute of Science and Technology (KIST) for financial support.
- Micro-protonic ceramic fuel cell
- Multilayer electrolyte
- Pulsed laser deposition
- Yttrium-doped barium cerate
- Yttrium-doped barium zirconate
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering