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AVAILABLE
TECHNOLOGIES |
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Method
for Making Flat, High Performance Thin Membrane Structures on Porous
Substances
IB-1305
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APPLICATIONS
OF TECHNOLOGY:
- Planar
solid oxide fuel cells
- Planar
gas separation devices
- Planar
membrane reactors
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ADVANTAGES:
-
Produces high-quality thin films with no warping
or cracking
- Solid
oxide fuel cells fabricated with this method
show exceptional performance at reduced temperatures
- Minimal
or no compressive loads required for sintering
- A
wide variety of conductors can be deposited
with minimal or no alteration of fabrication
equipment
- Requires
only small amounts of bilayer fabrication material,
making it suitable for expensive conductors
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ABSTRACT:
Craig
Jacobson, Lutgard DeJonghe, and Steven Visco have
invented an improved colloidal deposition technique
whereby high-quality films of a wide variety of
ionic and mixed ionic-electronic conductors can
be deposited on highly-porous electrode substrates.
They have discovered that in order to fabricate
large area, flat, bilayered plates, it is necessary
to have exceptionally good homogeneity of substrate
and film, as well as similar (well matched) sintering
rates and total shrinkage to avoid warping of
the bilayer during firing. The electrolyte is
applied by aerosol spraying (as opposed to reverse
slip casting.) This allows for improved control
and uniformity of the green or pre-sintered density
and film thickness. Bilayers can be freely sintered
to a high degree of flatness with minimal or no
compressive load. Thin-film solid oxide fuel cells
(SOFCs) fabricated using these techniques have
demonstrated exceptional performance at reduced
temperatures relative to conventional thick-film
SOFCs.
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STATUS:
- U.S. Patent #6,458,170. Available for licensing
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REFERENCE
NUMBER: IB-1305
FOR
MORE INFORMATION PLEASE SEE:
- V. E. J. van Dieten and Schoonman J., "Thin
film techniques for solid oxide fuel cells",
Soid State Ionics, 1-2, 57, 141-145,
1997.
- S. de Souza, Visco S. J., L. C. De Jonghe,
"Reduced-Temperature Solid Oxide Fuel Cell Based
on YSZ Thin-Film Electrolyte", journal of
the electrochemicl society, 144, 3, 1997.
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SEE
THESE OTHER BERKELEY LAB TECHNOLOGIES IN THIS
FIELD:
- Fail-Safe, Inexpensive
Electrochemical Device Stack Design, IB-1658A
- High Quality, Dense
Thin Films Using Metal/Metal Alloy Additives,
IB-1654
- Improved Electrode-Electrode
Structures for Solid State Electrochemical Device,
IB-1405
- Inexpensive Production
of High Density Thin Ceramic Films on Rigid
or Porous Substrates, IB-1302
- Low Cost Fabrication
of Thin-Film Ceramic Membranes for Nonshrinking
Substrates, IB-1304
- Metal Current Collector
Protected by Oxide Film, IB-1656
- Novel Support Structure
for Ceramic Electrochemical Devices, IB-1418
- Support for Planar
Solid State Electrochemical Devices, IB-1790
- Surface Additives
for Enhanced Electrode Performance, IB-1406
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CONTACT: |
Technology
Transfer Department
E.O. Lawrence Berkeley National Laboratory
MS 90-1070
Berkeley, CA 94720
(510) 486-6467 FAX: (510) 486-6457
TTD@lbl.gov |
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