Dome-Shaped Plates for Efficient Hydrogen Production in Electrolyzers

This patent describes an electrolyzer that uses uniquely dome-shaped plates to improve how water is split into hydrogen and oxygen, enhancing efficiency and product separation.

What it covers

This patent describes an electrolyzer built from a stack of dome-shaped bipolar plates (Claim 17). Each plate includes a rim with specific anode and cathode reaction outlets, which are aligned through the entire stack (Claim 18). Reactant liquids enter through inlets located in the center of each plate (Claim 19). The plates also feature overlapping anode and cathode channels on their respective sides to guide the flow (Claim 25). This design helps separate the products of hydrolysis, such as hydrogen from the cathodic side, allowing them to float up the stack through the outlets (Claim 32, 33). For example, water would be fed into the stack, split into hydrogen and oxygen, and these gases would then exit through the aligned outlets, with the dome shape potentially aiding in their separation and removal.

What it doesn't cover

• —Electrolyzers using flat or non-dome-shaped bipolar plates.
• —Bipolar plates where the anode and cathode reaction outlets are not aligned through the stack.
• —Electrolyzers that do not separate hydrolysis products, allowing them to float up through specific outlets.
• —Bipolar plates that lack reactant inlets extending throughout their center.
• —Electrolyzers where the anode and cathode channels do not overlap on the plate surfaces.

The clever bit

The novelty lies in the "dome-shaped" design of the bipolar plates and other components, which likely improves the flow dynamics and separation of gaseous products like hydrogen and oxygen within the electrolyzer stack. This shape could enhance efficiency by reducing resistance or improving gas removal.

Why it matters

Electrolyzers are crucial for producing green hydrogen, a key component in decarbonizing industries like transportation, energy storage, and industrial processes. This patent focuses on optimizing a core component, the bipolar plate, which directly impacts the efficiency and cost of hydrogen production. Innovations in electrolyzer design contribute to making hydrogen a more viable and widespread energy carrier.

Real-world examples

• 1.Alkaline electrolyzers
• 2.PEM electrolyzers
• 3.Green hydrogen production facilities
• 4.Industrial hydrogen generation units