Preparation method and application of bipolar plate

Abstract

The invention provides a preparation method of a bipolar plate. The preparation method comprises the steps of preparing raw materials, preparing a monopole plate through a mold hot-pressing method andpreparing the bipolar plate through gluing. The prepared bipolar plate comprises an anode plate, a cathode plate and a cooling channel formed by bonding the anode plate and the cathode plate, by reasonably controlling the content of the polymer and reasonably optimizing the hot-pressing preparation process conditions, the high conductivity and excellent mechanical strength of the bipolar plate are ensured, and by adjusting the technological parameters of blade coating, brush coating, silk-screen printing or dispensing, the good sealing of the polar plate is realized, and a cooling flow channel is ensured. The prepared bipolar plate is applied to a proton exchange membrane fuel cell, and a good performance result is obtained.

Description

technical field

[0001] The invention relates to the technical field of fuel cells, in particular to a preparation method and application of a bipolar plate. Background technique

[0002] The fuel cell stack bipolar plate (hereinafter referred to as "bipolar plate") is one of the key components of the fuel cell stack system. In the fuel cell stack, the bipolar plate is not only responsible for distributing fuel gas and air, but also realizing the The electrical connection and current collection between the batteries are also responsible for taking out waste heat from the active area and preventing the leakage of gas and coolant.

[0003] Graphite has the advantages of excellent corrosion resistance, low density, and low contact resistance with electrode support materials. The most widely used bipolar plate is the traditional graphite plate. Its preparation method is mainly that graphite powder is added with binder, after kneading and molding, it is carbonized and graphitize...

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