Tailoring ceramic membrane structures of solid oxide fuel cells via polymer-assisted electrospray deposition

Title
Tailoring ceramic membrane structures of solid oxide fuel cells via polymer-assisted electrospray deposition
Authors
김형철손지원김정훈신성수노호성최만수
Keywords
ceramic membrane structure; solid oxide fuel cells; polymer-assisted electrospray deposition; powder agglomeration; polymer addtives
Issue Date
2017-12
Publisher
Journal of membrane science
Citation
VOL 544-242
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/69672
ISSN
0376-7388
Appears in Collections:
KIST Publication > Article
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