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Method for fabrication of electrodes

United States Patent

June 22, 2004
View the Complete Patent at the US Patent & Trademark Office
Described herein is a method to fabricate porous thin-film electrodes for fuel cells and fuel cell stacks. Furthermore, the method can be used for all fuel cell electrolyte materials which utilize a continuous electrolyte layer. An electrode layer is deposited on a porous host structure by flowing gas (for example, Argon) from the bottomside of the host structure while simultaneously depositing a conductive material onto the topside of the host structure. By controlling the gas flow rate through the pores, along with the process conditions and deposition rate of the thin-film electrode material, a film of a pre-determined thickness can be formed. Once the porous electrode is formed, a continuous electrolyte thin-film is deposited, followed by a second porous electrode to complete the fuel cell structure.
Jankowski; Alan F. (Livermore, CA), Morse; Jeffrey D. (Martinez, CA), Barksdale; Randy (Livermore, CA)
The Regents of the University of California (Oakland, CA)
09/ 906,913
July 16, 2001
The U.S. Government has rights in this invention pursuant to Contract No. W-7405-ENG-46 between the U.S. Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.