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AVAILABLE
TECHNOLOGIES |
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Metal
Current Collector Protected by Oxide Film
IB-1656
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ADVANTAGES:
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Inexpensive
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Structurally sound
APPLICATIONS
OF TECHNOLOGY:
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Electricity production (e.g. solid oxide fuel
cells)
- Electrolytic
gas separation
- Electrolytic
syngas production by partial oxidation
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ABSTRACT:
Steven
Visco, Craig Jacobson, and Lutgard DeJonghe have
designed a cost-efficient, structurally sound
technology for current collection and cell-to-cell
interconnection of high temperature (>600 •C)
planar electrochemical devices. Current collection
is normally achieved using expensive metal oxides
or metals such as platinum or nickel. Berkeley
Lab's technology consists of a metal screen or
metal felt made substantially of inexpensive ferritic
steel coated with a thin oxide film, such as LaCrO3.
(FeCr-based alloys can also be coated with nickel
and a catalyst can be added.) The thin-film coated
metal screen is heated in an oxidizing atmosphere
at temperatures in excess of 400°C and the
film coating becomes oxidized. The thin film prevents
excessive oxidation of the underlying metal while
providing electrical connection between the metal
and the electrode of the electrochemical device.
This
invention allows planar-SOFC stacks to be pressed
together with Ni-felt current collects on the
anode side and metal-felt current collects on
the cathode side. It is especially applicable
to metal-supported devices but is also helpful
for ceramic or cermet supported SOFCs. It is particularly
useful for large cells (e.g. 1m x 1m plates) where
the current path is long.
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STATUS:
- U.S. Patent #6,740,441
- Available for exclusive or non-exclusive
licensing within all fields of use with the following
exception: only available for non-exclusive licensing
within the field of use covering solid oxide fuel
cells with electrical power output between 0.5kW
and 40kW that are designed for installation as
permanent fixtures in residential buildings and
small commercial business facilities.
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REFERENCE
NUMBER: IB-1656
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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
- Method for Making
Flat, High Performance Thin Membrane Structures
on Porous Substances, IB-1305
- 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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