Fuel cell membrane electrode coating and feeding device and method

Abstract

The invention relates to a fuel cell membrane electrode coating and feeding device which comprises a slurry tank, a slurry groove and a low temperature constant temperature groove; a refrigerant is filled in the low temperature constant temperature groove; the slurry tank is arranged in the low temperature constant temperature groove and is filled with slurry; a slurry taking pipe is inserted in the bottom of the slurry in the slurry tank; a slurry pump is connected with the other end of the slurry taking pipe; the output end of the slurry pump is connected with the slurry groove through a pipeline; a slurry pipeline switching valve, a slurry flow regulating valve and a slurry temperature measuring meter are sequentially arranged on a pipeline between the slurry pump and the slurry groove;the lower part of a coating roller is immersed in the slurry of a slurry pond and takes the slurry up through rotation; a plurality of holes are distributed in the outer surface of the coating roller; and the slurry filled in the holes of the coating roller is transferred onto a release back film above the coating roller. The fuel cell membrane electrode coating and feeding device can solve the problems that during the process about indirect coating preparation of CCM through a membrane electrode, the temperature of feed solution in a coating trough is affected by the environment, as a result, the temperature of the slurry is raised due to heating, and the slurry is reduced in viscosity, likely to generate bubbles and is not uniform in coating.

Description

[technical field] [0001] The invention belongs to the technical field of hydrogen energy, in particular to a fuel cell membrane electrode coating and feeding device and method. [Background technique] [0002] A hydrogen fuel cell is a catalytic H 2 , O 2 The energy conversion device that converts chemical energy into electricity has the characteristics of high efficiency and environmental protection. With the increasing shortage of global energy and the continuous improvement of environmental protection requirements, the demand for hydrogen fuel cell applications is increasing. Membrane electrode, the core component of hydrogen fuel cell, provides the electrochemical reaction area of ​​fuel cell. It is composed of proton exchange membrane, catalyst and gas diffusion layer. The catalyst is adhered to the proton membrane. [0003] In the process of preparing the membrane electrode, the catalyst needs to be prepared on the proton exchange membrane to form a CCM (catalyst-coa...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a fuel cell membrane electrode coating and feeding device, which can solve the problem that the temperature of the feed liquid in the coating tank is affected by the environment during the preparation of CCM by indirect coating of the membrane electrode, and avoid When the slurry is heated, the viscosity decreases, bubbles are easy to appear, and the coating is uneven.

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