Cell performance enhancement facilitated by mixed ionic and electronic conductor fiber for protonic ceramic fuel cells
- Authors
- Park, Sangho; Lee, Sewook; Baek, Hyeonwoo; Shin, Dongwook
- Issue Date
- Aug-2020
- Publisher
- SPRINGER
- Keywords
- Protonic ceramic fuel cells; Fibrous composite cathode; Electro-spinning; Microstructure
- Citation
- JOURNAL OF ELECTROCERAMICS, v.45, no.1, pp 1 - 6
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ELECTROCERAMICS
- Volume
- 45
- Number
- 1
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/145364
- DOI
- 10.1007/s10832-020-00218-3
- ISSN
- 1385-3449
1573-8663
- Abstract
- This study examines the electrochemical properties of a fibrous composite cathode for protonic ceramic fuel cells (PCFC). Sm0.5Sr0.5CoO3-delta(SSC) fibers having embedded BaCe0.5Zr0.35Y0.15O3-delta(BCZY) particles were fabricated using the electro-spinning process. The BCZY powders were prepared using the conventional citrate-nitrate method. It was subsequently mixed with an SSC solution comprising polyvinylpyrrolidone and aqueous metal nitrate. By electro-spinning the obtained mixture, continuous and longish fibers were obtained, yielding a fiber diameter of 150-200 nm after calcination. The calcined composite nanofibers were deposited via the electrostatic slurry spray deposition technique as a cathode layer on a half-cell comprising NiO and BCZY.According to the results of the single-cell measurement, the fibrous composite cathode exhibited much higher electrochemical properties than a typical nanocomposite cathode over the entire operating temperature range of 550-700 degrees C. Specifically, the polarization resistance of the fibrous composite cathodes was 0.186 omega center dot cm(2)at 700 degrees C, lower than that of a typical nanocomposite cathode. In accordance with the impedance analysis, the maximum power density given by the I-V curve was 642 mW/cm(2)at 700 degrees C, which is regarded as reasonable performance for PCFCs.
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