Roll to Roll Membrane Electrode Coater

Roll to Roll Membrane Electrode Coater – Spraying Fuel Cell Catalyst Inks – Cheersonic

Fuel cells are known to generate electricity through an electrochemical reaction between hydrogen and oxygen. The characteristic of the fuel cell is that it can continuously generate electricity using external chemically reactive materials without the need for a separate charging process.

A fuel cell may include a separator with a membrane electrode assembly (MEA) interposed therebetween. A plurality of fuel cells may be arranged in series to form a fuel cell stack.

Here, the membrane electrode assembly, which is the core part of the fuel cell, is exemplified by a three-layer membrane electrode CCM, in which an anode catalyst electrode layer and a cathode catalyst electrode layer are formed with an electrolyte membrane sandwiched between them, through which hydrogen gas passes, Ions move between them. The anode catalyst electrode layer is formed on one side of the electrolyte membrane, and the cathode catalyst electrode layer is formed on the other side of the electrolyte membrane. Such a membrane electrode assembly having a 3-layer structure can be manufactured by using, for example, a direct coating method, a decal method, or the like.

Our company has recently developed a roll-to-roll film electrode coating machine, which has a larger throughput than the laboratory scale. For example, for our lab-scale ultrasonic spraying, it takes about one and a half hours to spray a 100 cm2 area with a 1 mg/cm2 Ir loading. A roll-to-roll coater achieves this load in just 7.5 seconds. Roll-to-roll coater throughput is greatly increased compared to laboratory spraying.

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