US Patent No: 7,282,293

Number of patents in Portfolio can not be more than 2000

Passive water management techniques in direct methanol fuel cells

ALSO PUBLISHED AS: 20040209154

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Abstract

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Passive water management techniques are provided in an air-breathing direct oxidation fuel cell system. A highly hydrophobic component with sub-micrometer wide pores is laminated to the catalyzed membrane electrolyte on the cathode side. This component blocks liquid water from traveling out of the cathode and instead causes the water to be driven through the polymer membrane electrolyte to the cell anode. The air-breathing direct oxidation fuel cell also includes a layer of cathode backing and additional cathode filter components on an exterior aspect of the cell cathode which lessen the water vapor escape rate from the cell cathode. The combination of the well laminated hydrophobic microporous layer, the thicker backing and the added filter layer, together defines a cathode structure of unique water management capacity, that enables to operate a DMFC with direct, controlled rate supply of neat (100%) methanol, without the need for any external supply or pumping of water. The cell anode is provided with a hydrophilic backing layer. When the water is driven through the polymer membrane electrolyte from the cell cathode to the cell anode chamber, it is available for the anodic reaction, and any excess water is carried out along CO.sub.2 ventilation channels to the outside environment.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MTI MICROFUEL CELLS INC.ALBANY, NY46

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gottesfeld, Shimshon Niskayuna, NY 56 959
Kovacs, Frank W Waterford, NY 14 62
Ren, Xiaoming Menands, NY 46 310
Shufon, Kevin J Troy, NY 9 47

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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Other [Check patent profile for assignment information] (1)
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Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CELLERA, INC. (3)
7,943,258 Alkaline membrane fuel cells and apparatus and methods for supplying water thereto 1 2009
8,304,368 Catalyst coated membrane (CCM) and catalyst film/layer for alkaline membrane fuel cells and methods of making same 0 2010
8,257,872 Alkaline membrane fuel cells and apparatus and methods for supplying water thereto 0 2011
 
AIR PRODUCTS AND CHEMICALS, INC. (1)
7,591,964 Electrochemical devices comprising proton conducting mediums 2 2007
 
CANON KABUSHIKI KAISHA (1)
8,435,695 Gas diffusion electrode, fuel cell, and manufacturing method for the gas diffusion electrode 0 2008
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
7,687,185 Using sacrificial material to mitigate catalyst support corrosion in fuel cell electrode 0 2006
 
HONEYWELL INTERNATIONAL INC. (1)
7,727,655 Fuel cell stack having catalyst coated proton exchange member 3 2005
 
MTI MICROFUEL CELLS INC. (1)
7,541,109 Passive water management techniques in direct methanol fuel cells 3 2007
 
SIEMENS AKTIENGESELLSCHAFT (1)
7,682,725 Gas diffusion electrode and method for its production 0 2004
 
UNITED TECHNOLOGIES CORPORATION (1)
8,177,884 Fuel deoxygenator with porous support plate 0 2009

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