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Methanol sensor operated in a passive mode

United States Patent

December 3, 2002
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Direct Methanol Fuel Cells
A sensor outputs a signal related to a concentration of methanol in an aqueous solution adjacent the sensor. A membrane electrode assembly (MEA) is included with an anode side and a cathode side. An anode current collector supports the anode side of the MEA and has a flow channel therethrough for flowing a stream of the aqueous solution and forms a physical barrier to control access of the methanol to the anode side of the MEA. A cathode current collector supports the cathode side of the MEA and is configured for air access to the cathode side of the MEA. A current sensor is connected to measure the current in a short circuit across the sensor electrodes to provide an output signal functionally related to the concentration of methanol in the aqueous solution.
Ren; Xiaoming (Los Alamos, NM), Gottesfeld; Shimshon (Los Alamos, NM)
The Regents of the University of California (Los Alamos, NM)
09/ 730,142
December 4, 2000
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W-405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.