Info

+ N- ;

2. Proton Exchange:

Occurs through the membrane.

3. Electron Flow:

Through external circuit.

1. Water Electrolysis Reaction: \

Oxygen is produced at the anode.

2. Proton Exchange:

Occurs through the membrane.

H2 Captured:

Hydrogen

4. Electrons Recombine with Protons: Hydrogen is produced at the cathode.

3. Electron Flow:

Through external circuit.

4. Electrons Recombine with Protons: Hydrogen is produced at the cathode.

Because the contact pressure in the junction between the membrane and the electrode is critical in keeping resistance and voltage drop to a minimum, a machined and very flat aluminum plate is set at both ends of the stack. Using stainless steel rods passing through the stack at each corner, controlled pressure can be applied. A spring washer, known as a Bellville washer, is used under each bolt head to help control compression as the stack heats up and expands.

Electrolyzer Stack Showing Two Complete Cells

O2 Out

Gasket

End Plate:

304 Stainless steel nx

H2 Out

Body: Delrin

Anode

The PEM electrolyzer stack—eight cells operating at 2 VDC nominal per cell—separates the hydrogen and oxygen atoms of water molecules.

The PEM electrolyzer stack—eight cells operating at 2 VDC nominal per cell—separates the hydrogen and oxygen atoms of water molecules.

Proton Exchange

Membrane

Second Cell

H2O in ux

11 Nickel Screen:

With gasket

Cathode

Gas Channels r \

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