Proton exchange membrane fuel cell structure applicable to high temperature operation

Abstract

The invention relates to a fuel cell, in particular a structure of the fuel cell having a proton exchange membrane applicable to high temperature operation, which comprises a fuel flow field, a CCM, an oxidizer flow field, and thin metal separating boards arranged on two sides of the oxidizer flow field. Inner sides of the thin metal separating boards are provided with poriferous layers of conductive material which are taken as flow fields and diffusing layers. The structure of the invention can simplify the structure of the fuel cell and greatly reduce the size.

Description

technical field [0001] The present invention relates to a fuel cell, in particular to a structure of a proton exchange membrane fuel cell suitable for high temperature operation, that is, a "membrane electrode bipolar plate assembly (Membrane Electrode Bipolarplate Assembly, MEBA)". Background technique [0002] A fuel cell is an isothermal power generation device that directly converts chemical energy into electrical energy in an electrochemical manner. It does not go through a heat engine process, so it is not limited by the Carnot cycle, has high energy conversion efficiency, and is environmentally friendly. Due to these outstanding advantages, the research and development of fuel cell technology has attracted much attention from governments and large companies in recent years, and it is considered to be the preferred clean and efficient power generation method in the 21st century. Among them, high-temperature proton exchange membrane fuel cells have recently attracted w...

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Problems solved by technology

In order to eliminate the influence of water when the conventional system is shut down at low temperature, it needs to be purged, which increases the complexity of the system, and part of the liquid water in the membrane will remain

[0004] At present, the research on high-temperature membranes has attracted widespread attention in the world, but the structure of proton exchange membrane fuel cells suitable for high-temperature operation is still a blank, because the form of fluid and the characteristics of heat and mass transfer in high-temperature fuel cells are different from those of conventional fuel cells. battery, so it is necessary to establish a new fuel cell structure to meet the needs of high temperature proton exchange membrane fuel cells

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