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Microtextured fuel cell elements for improved water management

A technology of fuel cell and microstructure, which is applied to fuel cell parts, fuel cells, solid electrolyte fuel cells, etc., can solve the problem that the reaction ratio cannot be guaranteed, and achieve the effect of increasing hydrophilicity

Active Publication Date: 2008-10-08
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, if a separator of a cell contains a relatively large amount of liquid water, it may experience a "starving" state where so much gas flow is diverted to an adjacent cell that the reaction stoichiometry cannot be guaranteed

Method used

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  • Microtextured fuel cell elements for improved water management
  • Microtextured fuel cell elements for improved water management
  • Microtextured fuel cell elements for improved water management

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Embodiment Construction

[0028] The following descriptions of the subject matter, preparation, and utilization of the teachings disclosed herein are merely exemplary in nature and are not intended to limit the claims of this application or other applications claiming priority from this application or of patents issued therefrom. The scope, application and use of any particular invention.

[0029] The present invention provides methods and materials for improving water management in fuel cells by microstructuring fuel cell components including separators and / or gas diffusion media. A method of making a fuel cell includes contacting a separator with a gas diffusion medium to form a covered gas flow field. The separator includes a plurality of lands defining a plurality of flow channels to form a reactant gas flow field, and the gas diffusion media includes a first surface area complementary to the plurality of lands of the separator, and a plurality of flow channels of the separator. and a complementar...

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Abstract

Methods and materials to improve water management in a fuel cell by microtexturing fuel cell elements, including the separator plate and / or the gas diffusion media. A method of manufacturing a fuel cell includes a separator plate and / or a gas diffusion media that are microtextured. Selective ablation of material and stamping can impart microtexturing, where the microtexturing facilitates water management in the fuel cell.

Description

technical field [0001] This invention relates to fuel cells and, more particularly, to fuel cell components related to water management. Background technique [0002] Fuel cells are already being used as power sources to provide electricity for automobiles and other industrial applications. A typical fuel cell has a membrane electrode assembly (MEA) that includes catalytic electrodes and a proton exchange membrane (PEM) sandwiched between an anode and a cathode. Gas diffusion media made of porous conductive materials can be used on both the cathode and anode sides to improve cell operation. The MEA is sandwiched between a pair of conductive contact elements that act as anode and cathode current collectors. [0003] A bipolar PEM fuel cell may include multiple MEAs stacked together in series, separated from the next by gas-tight, electrically conductive contact elements called bipolar plates or separators. The separator may have two working faces, one facing the anode of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/14H01M4/88H01M8/10
CPCH01M8/0247Y02E60/50H01M8/0228H01M8/0221H01M8/0239H01M8/0245H01M2008/1095H01M8/04119H01M8/0206H01M8/0267H01M8/0226Y02P70/50H01M8/241H01M8/026
Inventor G·V·达赫奇R·H·布伦克T·A·特拉波尔德R·L·达塔K·E·纽曼
Owner GM GLOBAL TECH OPERATIONS LLC
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