Crack-free cathode of intermediate-temperature solid oxide fuel cells via electrospray deposition
- Authors
- Li, Guangmin; Kim, Jeong Hun; Son, Ji-Won; Choi, Mansoo; Kim, Hyoungchul; Shin, Sung Soo
- Issue Date
- 1월-2022
- Publisher
- WILEY
- Keywords
- cracks; cracking; electrospray deposition; polymers; polymerization; solid oxide fuel cell; thermal properties
- Citation
- INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, v.19, no.1, pp.241 - 248
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
- Volume
- 19
- Number
- 1
- Start Page
- 241
- End Page
- 248
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/135316
- DOI
- 10.1111/ijac.13853
- ISSN
- 1546-542X
- Abstract
- Cracks and delamination primarily revealed in the microscale-thick cathode have been known as the major cause of increasing the polarization resistance and inhibiting the low-temperature operation of solid oxide fuel cells (SOFCs). Besides, these defects were originated from the polymer dispersant, essential for the fabrication of the bulk cathode layer. Herein, we manufactured a crack-free cathode layer by optimizing the deposition temperature (T-dep) of the powder-suspension electrospray deposition (ESD) process through thermal characterization of polyvinylpyrrolidone (PVP), a polymer used in the slurry of ESD. SOFCs with the cathode deposited at the glass transition temperature of PVP resulted in a maximum power density of 0.481 W/cm(2), 37% and 39% improved than those with the cathode deposited at T-dep = 25 and 200celcius, respectively, at 650celcius. Furthermore, the effect of uniformly dispersed morphology of cathode without defects was demonstrated by the reduction of polarization resistance through electrochemical impedance spectroscopy analysis.
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