Motorola Corporation

Gene Kim

Steven Duane Pratt

Ronald James Kelley

Sivakumar Muthuswamy

Stephen O Bozzone

Bonnie J Bachman

Nanofibrous articles can be manufactured by a process that includes preparation of a surface of a substrate to provide an adhesion mechanism for securing the nanofibers to the surface. The nanofibers can be dispersed in an area near the substrate for the purpose of being adhered to the surface. If an ordered arrangement of nanofibers is required, an electric field can be provided in the area where the nanofibers are dispersed to selectively control an ordering of the nanofibers as they are adhered to the surface by the adhesion mechanism.

Nanofibrous articles

A fuel cell () includes a membrane electrode assembly () located together with a layer of variable porosity porous gas diffusion material (). The variable porosity gas diffusion material layer () operates to selectively limit the amount of reactants reaching localized areas of the membrane electrode assembly () in order to reduce hot spots.

Fuel cell using variable porosity gas diffusion material

A thermo-responsive polymer is incorporated into a fuel cell ( ) in order to maintain optimum hydration of the polymer electrolyte membrane. The thermo-responsive polymer ( ) is situated proximate to the membrane electrode assembly ( ) such that fuel or oxidant gas passes ( ) through the thermo-responsive polymer to the membrane electrode assembly. The thermo-responsive polymer swells or shrinks in response to changes in the operating temperature of the membrane electrode assembly, altering the flow rate of the fuel or oxidant gas passing through the thermo-responsive polymer.

Growing community of inventors

Plantation, FL, United States of America

Gene Kim