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Method of forming catalyst coating on base board

A fuel cell, membrane electrode assembly technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell additives, etc., can solve problems such as hindering the operation of fuel cells, troubles, etc.

Inactive Publication Date: 2006-11-01
GENERAL MOTORS COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the disadvantages mentioned above, the phenomenon of preventing the flow of water from the MEA, commonly referred to as "flooding", is particularly troublesome
Flooding can hinder fuel cell operation at low current densities when the air flow through the cathode flow field plate is insufficient to drive the water removal process

Method used

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  • Method of forming catalyst coating on base board
  • Method of forming catalyst coating on base board
  • Method of forming catalyst coating on base board

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Embodiment Construction

[0015] The following description of the preferred embodiments is merely exemplary in nature, rather than limiting the present invention, its application or use.

[0016] figure 1 Shown is a two-cell bipolar fuel cell stack 2 having a conductive fluid distribution member 8, hereinafter referred to as a bipolar plate 8, and a pair of membrane electrode assemblies (MEAs) 4 and 6 spaced apart from each other. The MEAs 4 and 6 and the bipolar plate 8 are stacked between the stainless steel splints or end plates 10 and 12, and between the end contact parts 14 and 16. The end contact parts 14 and 16, and the two working surfaces of the bipolar plate 8 respectively have a plurality of grooves or channels 18 (as shown by the imaginary layer) 20, 22, and 24 for distributing fuel and fuel to MEAs 4 and 6 Oxidizing gas (i.e. H 2 And O 2 ). Non-conductive gaskets 26, 28, 30, and 32 provide sealing and electrical insulation between the various elements of the fuel cell stack. Oxygen is suppli...

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Abstract

A fuel cell comprising an ionically conductive member with a first surface and a second surface. An anode electrode is disposed on the first surface of the ionically conductive member and a cathode electrode is disposed on the second surface of the ionically conductive member. A first electrically conductive fluid distribution element is disposed on the anode and a second electrically conductive fluid distribution element is disposed on the cathode The first and second electrically conductive fluid distribution elements each include a plurality of alternating lands and fluid passages. The anode and the cathode are comprised of a plurality of electrochemically active regions that are disposed to essentially align with the fluid passages.

Description

Technical field [0001] The present invention relates to a proton exchange membrane fuel cell. In particular, the present invention relates to a fuel cell in which electrochemically active materials are arranged in correspondingly aligned areas with conductive fluid distribution members to remove gas diffusion media from the fuel cell. Background technique [0002] Fuel cells have been proposed as a power source for electric vehicles and other applications. One such fuel cell is a PEM (proton exchange membrane) fuel cell, which includes what is commonly referred to as a "membrane electrode assembly" (MEA), which includes a thin solid polymer membrane electrolyte, opposite to the membrane electrolyte There are a pair of electrodes (namely anode and cathode) on the surface. The MEA is sandwiched between a pair of conductive fluid distributing parts (ie bipolar plates). The conductive fluid distributing part acts as a current collector of the electrode and contains a so-called "flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M4/86H01M4/88H01M8/02H01M8/10
CPCH01M4/8605H01M4/8647H01M4/8803H01M4/8807H01M4/881H01M4/8814H01M4/8828H01M4/8882H01M8/0241H01M8/0247H01M8/04291H01M8/1004Y02E60/50
Inventor T·A·特拉波尔德M·R·舍内维斯
Owner GENERAL MOTORS COMPANY