Allison J Fisher

US Patent:

6497975, Dec 24, 2002

Filed:

Dec 15, 2000

Appl. No.:

09/738126

Inventors:

Joseph W. Bostaph - Chandler AZ
Chowdary R. Koripella - Scottsdale AZ
Allison M. Fisher - Chandler AZ
Jay K. Neutzler - Santa Fe NM

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 802

US Classification:

429 38, 429 32, 429 34, 429 39, 429 44, 427115

Abstract:

A fuel cell device and method of forming the fuel cell device including a base portion, formed of a singular body, and having a major surface. At least one fuel cell membrane electrode assembly is formed on the major surface of the base portion. A fluid supply channel including a mixing chamber is defined in the base portion and communicating with the fuel cell membrane electrode assembly for supplying a fuel-bearing fluid to the membrane electrode assembly. An exhaust channel is defined in the base portion and communicating with the membrane electrode. A multi-dimensional fuel flow field is defined in the multi-layer base portion and in communication with the fluid supply channel, the membrane electrode assembly and the exhaust channel.

US Patent:

6503378, Jan 7, 2003

Filed:

Apr 23, 2001

Appl. No.:

09/797557

Inventors:

Allison M. Fisher - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

C25B 1300

US Classification:

204296, 429 33, 429 30

Abstract:

A polymer electrolyte membrane comprised of a hydrophobic hydrocarbon region, a hydrophilic region containing covalently bound acid functional groups and protic functional groups. The hydrophobic hydrocarbon region and the hydrophilic region are covalently bound to form a single polymer molecule.

US Patent:

6660423, Dec 9, 2003

Filed:

Dec 15, 2000

Appl. No.:

09/738131

Inventors:

Jay Neutzler - Santa Fe NM
Joseph W. Bostaph - Chandler AZ
Allison M. Fisher - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 802

US Classification:

429 38, 429 32, 429 34, 429 40, 429 44, 427115

Abstract:

A fuel cell device and method of forming the fuel cell device including a base portion, formed of a singular body, and having a major surface. At least one fuel cell membrane electrode assembly including a plurality of hydrophilic threads for the wicking of reaction water is formed on the major surface of the base portion. A fluid supply channel including a mixing chamber is defined in the base portion and communicating with the fuel cell membrane electrode assembly for supplying a fuel-bearing fluid to the membrane electrode assembly. An exhaust channel including a water recovery and recirculation channel is defined in the base portion and communicating with the membrane electrode assembly and the plurality of hydrophilic threads. The membrane electrode assembly and the cooperating fluid supply channel and cooperating exhaust channel forming a single fuel cell assembly.

US Patent:

6670403, Dec 30, 2003

Filed:

Nov 6, 2002

Appl. No.:

10/289093

Inventors:

Allison M. Fisher - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

C08J 520

US Classification:

521 27

Abstract:

A polymer electrolyte membrane comprised of a hydrophobic hydrocarbon region, a hydrophilic region containing covalently bound acid functional groups and protic functional groups. The hydrophobic hydrocarbon region and the hydrophilic region are covalently bound to form a single polymer molecule.

US Patent:

6696189, Feb 24, 2004

Filed:

Dec 15, 2000

Appl. No.:

09/738130

Inventors:

Joseph W. Bostaph - Chandler AZ
Chowdary R. Koripella - Scottsdale AZ
Allison M. Fisher - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 802

US Classification:

429 22, 429 32, 429 34, 429 38, 429 42, 429 44, 427115

Abstract:

A fuel cell system and method of forming the fuel cell system including a base portion, formed of a singular body, and having a major surface. At least one fuel cell membrane electrode assembly is formed on the major surface of the base portion. A fluid supply channel including a mixing chamber is defined in the base portion and communicating with the fuel cell membrane electrode assembly for supplying a fuel-bearing fluid to the membrane electrode assembly. A methanol concentration sensor is positioned to communicate with the fuel cell membrane electrode assembly and the fuel-supply channel for regulating the mixture of fuel to the electrode assembly. An exhaust channel including a water recovery and recirculation system is defined in the base portion and communicating with the membrane electrode assembly.

US Patent:

6696195, Feb 24, 2004

Filed:

Aug 9, 2001

Appl. No.:

09/925949

Inventors:

Jeanne S. Pavio - Paradise Valley AZ
Joseph W. Bostaph - Chandler AZ
Allison M. Fisher - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 804

US Classification:

429 38, 429 22, 429 30, 429 34

Abstract:

A fuel cell device and method of forming the fuel cell device including a base portion, formed of a singular body, and having a major surface. At least one fuel cell membrane electrode assembly is formed on the major surface of the base portion and includes an electrically conductive hydrophilic material for the wicking of reaction water and providing for electrical conduction to a current collector. A fluid supply channel including a mixing chamber is defined in the base portion and communicating with the fuel cell membrane electrode assembly for supplying a fuel-bearing fluid to the membrane electrode assembly. An exhaust channel including a water recovery and recirculation channel is defined in the base portion and communicating with the membrane electrode assembly and the electrically conductive hydrophilic material. The membrane electrode assembly and the cooperating fluid supply channel and cooperating exhaust channel forming a single fuel cell assembly.

US Patent:

6908500, Jun 21, 2005

Filed:

Apr 8, 2002

Appl. No.:

10/118275

Inventors:

Allison M. Fisher - Chandler AZ, US
Joseph W. Bostaph - Gilbert AZ, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

B01D053/22
B01D019/00

US Classification:

96 6, 95 46, 429 53, 429 72

Abstract:

A system and method for controlling or otherwise effectively parameterizing the transport of dissolved, retained and/or exhausted gaseous byproducts generated in the operation of a fuel cell device comprises a gas permeable membrane () for substantially in-line, gravity-independent partitioning of, for example, carbon dioxide () in a DMFC device (). Various features and parameters of the present invention may be suitably adapted to optimize the gas transport function for any specific fuel cell design. The present invention provides improved control of the rate of removal of gaseous byproducts from a fuel cell fuel solution in addition to improved application of fuel cell technology to power inter alia portable electronic devices.

US Patent:

20070003814, Jan 4, 2007

Filed:

Jun 29, 2005

Appl. No.:

11/174269

Inventors:

Allison Fisher - Chandler AZ, US
Jerald Hallmark - Gilbert AZ, US
Stephen Samms - Mesa AZ, US

International Classification:

H01M 8/02
H01M 8/04

US Classification:

429038000, 429026000

Abstract:

A polymer electrolyte membrane fuel cell stack () includes a plurality of membrane electrode assemblies () having evenly distributed fuel concentration across an anode (), and efficient cooling across a cathode (). A first plate () has a fuel side () with a plurality of serpentine channels () formed therein for distributing fuel across the anode (), and a second plate () has an oxidant side () with oxidant channels () formed therein for distributing an oxidant across the cathode (). The membrane electrode assembly () has an even fuel concentration thereacross, and the oxidant is routed through the cell () at least twice for absorbing heat prior to being distributed across the cathode ().