Xerox Corporation

Gm Global Technolgoy Operations, Inc.

Zhilei Wang

Huoy-Jen Yuh

John S Chambers

Jacques C Bertrand

Samir Kumar

Mark C Petropoulos

K Derek Henderson

Mark S Thomas

Harold F Hammond

Lewis S Smith

Sean X Pan

Jeremy B Pinsly

Daniel G Hullihen, Jr

Dawn M O'Loughlin

Linnette Perales Rivera

Daniel E Juda

Steven D Booth

A method for pre-treating a membrane electrode assembly (MEA) for a fuel cell is disclosed. According to the method of the invention, the MEA is subjected to multiple wet/dry cycles prior to assembly of the MEA into the fuel cell stack. The pre-treatment wet/dry cycles of the present invention eliminate or reduce the irreversible dimensional changes which occur in the polymer electrolyte membrane in the MEA throughout the wet/dry cycles of fuel cell operation. This reduces stress applied to the MEA throughout wet/dry cycles which occur during operation of the fuel cell. Consequently, the formation and propagation of pinholes in the membrane is reduced, increasing the lifetime of the MEA.

Pre-treatment method for membrane electrode assembly

Substrate with raised surface portion

A photoreceptor including: (a) a substrate; (b) a charge blocking layer including n-type particles and a linear phenolic binder composition; and (c) an imaging layer.

Blocking layer with linear phenolic resin

Blocking layer with needle shaped particles

A process for preparing toner compositions comprising: coinjecting into a continuously operating fluid energy mill, feed toner particles, and a liquid component; and separating the resulting comminuted toner particles.

Toner particle comminution and surface treatment processes

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Penfield, NY, United States of America

Zhilei Wang