Tailoring ceramic membrane structures of solid oxide fuel cells via polymer-assisted electrospray deposition
- Tailoring ceramic membrane structures of solid oxide fuel cells via polymer-assisted electrospray deposition
- 김형철; 손지원; 김정훈; 신성수; 노호성; 최만수
- ceramic membrane structure; solid oxide fuel cells; polymer-assisted electrospray deposition; powder agglomeration; polymer addtives
- Issue Date
- Journal of membrane science
- VOL 544-242
- A versatile and robust process was developed for the fabrication of ceramic films in solid oxide fuel cells (SOFCs), allowing the microstructures of the films to be tailored from porous to dense. This nanoscale spray process was assisted by electrospray ionization and specific polymer additives such as polyvinyl pyrrolidone and polyvinyl butyral, and it provided a large degree of freedom for controlling the membrane microstructures of the cathode and electrolyte. The final spray-deposition-based SOFC cell, which consisted of a dense, thin electrolyte (thickness: ~4 µ m) and a crack-free porous cathode layer (thickness: ~10 µ m), exhibited notable reliability, an open-circuit voltage of ~1.11 V (approaching the theoretical value), and a maximum power density of ~805 mW/cm2 at 650 °C, which is substantially higher than the power-generating performances of previously reported spray-deposition-based SOFCs.
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