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Localized deactivation of a membrane

A deactivation and electrolyte membrane technology, applied to fuel cell parts, electrochemical generators, structural parts, etc.

Active Publication Date: 2008-02-20
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, premature failure was still found in the region of the catalyst edge below the edge protection material

Method used

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  • Localized deactivation of a membrane
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Embodiment Construction

[0013] The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention and its application or uses.

[0014] Referring to FIG. 1, one embodiment of the present invention includes a membrane 30 comprising a central active region 30a (having ion conductivity) capable of conducting protons through the active region 30a of the membrane 30, and the The membrane includes a deactivated edge region 30b (not ionically conductive) that surrounds the activated region 30a and prevents conduction of protons through the deactivated region 30b of the membrane 30 .

[0015] The solid polymer electrolyte membrane 30 useful for the present invention is an ion-conducting material. Suitable membranes useful for the present invention are described in US Patents 4,272,353 and 3,134,697 and in Journal of Power Sources, Vol. 29 (1990), pp. 367-387. Such membranes are also referred to as ion exchange resin membranes. The resin comprises ion...

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Abstract

A method comprising providing an ion conducting membrane and deactivating selected regions of the membrane.

Description

technical field [0001] The field to which the present disclosure generally pertains includes ion-conducting membranes, products made from the ion-conducting membranes, and methods of making and utilizing the products. Background technique [0002] Fuel cells typically include a membrane, such as a polymer electrolyte membrane (PEM), which conducts protons and is sandwiched between a cathode catalyst layer and an anode catalyst layer. A gas diffusion media (GDM) layer may be bonded to the cathode catalyst layer and the anode catalyst layer, respectively. In some applications, the catalyst layer is coated on the gas diffusion media, while in other applications, the catalyst layer is coated on the membrane. The membrane, the two catalyst layers and the two gas diffusion media are collectively referred to hereinafter as the membrane electrode assembly (MEA). A conductive separator (bipolar plate) for mechanically fastening the membrane electrode assembly and electrically conne...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M8/10C08J5/22H01M4/86H01M4/88
CPCH01M2300/0082H01M8/1004H01M4/881H01M2008/1095Y02E60/521Y02E60/50
Inventor M·M·费B·T·多布利斯T·J·富勒
Owner GM GLOBAL TECH OPERATIONS LLC