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Fuel battery using hydration non-perfluocarbon hydrocarbon ion-exchange membrane

A technology of hydrocarbons and fuel cells, applied in fuel cells, fuel cell components, battery electrodes, etc., can solve the problems of fuel cell performance degradation and instability, and achieve low-cost effects

Inactive Publication Date: 2009-07-01
INT FUEL CELLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this improved performance is short-term, as the ruthenium in the anode is unstable and tends to migrate through the membrane until it precipitates onto the cathode
Ruthenium on the cathode inhibits the cathodic reaction, resulting in reduced fuel cell performance

Method used

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  • Fuel battery using hydration non-perfluocarbon hydrocarbon ion-exchange membrane
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  • Fuel battery using hydration non-perfluocarbon hydrocarbon ion-exchange membrane

Examples

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Embodiment Construction

[0021] refer to figure 1 , shows part of a pair of fuel cells 8,9. Each fuel cell has a set of electrode assemblies 12 , porous and hydrophilic fuel reactant gas flow field plates 13 and porous and hydrophilic oxidant reactant gas flow field plates 14 . The fuel reactant gas flow field plate 13 contains fuel flow channels 17 and grooves 18 which, together with the grooves 19 in the oxidant reactant gas flow field plate 14, form channels 20 for hydrating the liquid state of the membrane. water and used to remove product water from the cathode. The oxidant reactant gas flow field plate 14 has an oxidant reactant gas flow field channel 23 .

[0022] Channels 20 may be of large cross-section, sufficient to carry sufficient water to convectively cool the fuel cell by transferring sensible heat to the water. This can be achieved with a coolant pump, heat exchanger and controls, or this can be achieved in a passive system that has no pump and relies on convection or other passive ...

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Abstract

Fuel cells (9) include unitized electrode assemblies (12) having a non- perfluorinated hydrocarbon ionomer exchange membrane (26) with anode and cathode catalysts (27, 28) disposed on opposite sides thereof. Adjacent the catalysts, respective optional sublayers (29, 30) may be supported by corresponding gas diffusion layers (31, 32), with adjacent porous, hydrophilic, water transferring reactant gas flow field plates (13, 14) having respective fuel (17) and oxidant (23) reactant gas flow field channels. Water channels (18, 19, 20) hydrate the membrane (26), clear the product water from the cathode (28, 30, 32), flush peroxide radicals, and may also cool the fuel cells. Improved performance (124) (higher voltage at higher current densities) is achieved along with elimination of a propensity for degradation from peroxide decomposition products resulting from oxygen solubility of perfluorinated membranes. Platinum / ruthenium alloy anode catalysts improve performance without degradation which occurs with perfluorinated membranes.

Description

technical field [0001] The present invention relates to the use of non-perfluorinated hydrocarbon ion exchange membranes in fuel cells wherein said ion exchange membrane is substantially 100% hydrated by one or more porous, hydrophilic, water transporting reactant gas flow field plates , the flow field plate ensures hydration while preventing flooding, and involves platinum and platinum alloy fuel cell catalysts combined therewith. Background technique [0002] A fuel cell that has attracted attention because of its compactness and ability to provide high current density is the solid polymer electrolyte fuel cell. Such cells are also commonly referred to as "proton exchange membrane" (PEM) fuel cells. Ion-exchange membranes, which are solid polymer electrolytes, most commonly comprising perfluorinated hydrocarbon ionomers, such as Dupont's under the trademark sold. [0003] However, these membranes are expensive and prone to decomposition due to the formation of peroxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86
CPCH01M2008/1095Y02E60/521H01M4/8605H01M8/023H01M4/921H01M8/04126H01M8/1002H01M8/1007Y02E60/50
Inventor R·M·达林L·V·普罗特塞洛S·M·古普塔
Owner INT FUEL CELLS
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