WEW Hydrogen (Develop efficient and simple alkaline water electrolyzers for green hydrogen production)

WEW Hydrogen, a German hydrogen energy startup founded in 2021, develops innovative alkaline water electrolyzers for green hydrogen production from renewable energy sources.

Challenges: green hydrogen

Hydrogen (H₂), the most abundant element in the universe, is not just a fundamental building block of stars—it's also a vital ingredient in the synthesis of ammonia. Ammonia production is at the heart of creating a plethora of products that we rely on daily, from the fertilizers that nourish our crops to the plastics that are woven into the fabric of modern life.

Traditionally, the world has leaned heavily on steam methane reforming (SMR) to produce over 60 million tons of hydrogen annually. However, this method comes with a significant environmental cost. It's an energy-intensive process that contributes approximately 2% to the global carbon dioxide (CO₂) emissions, releasing between 5 and 9 tons of CO₂ for every ton of hydrogen it generates.

But there's a cleaner path forward: water electrolysis. This process splits water into hydrogen and oxygen using electric current and comes in various forms, including alkaline water electrolyzer (AWE), proton exchange membrane water electrolyzer (PEMWE), and solid oxide electrolysis cells (SOEC). When these electrolyzers are powered by renewable energy sources—think nuclear, solar, and wind power—the result is "green hydrogen".

WEW Hydrogen Technology

WEW has developed innovative alkaline water electrolyzers to produce green hydrogen with high efficiency and simplicity. The company manufactures two half-cell chamber walls with very thin metallic sheets. This results in a light-weight electrolytic cell with sufficient stability. The electrodes have a zero gap with a separator membrane, thus improving the efficiency of electrolytic cells. Significantly, WEW’s electrolytic cells are vacuum-stiffened; they are subject to a slight lower pressure relative to the atmosphere. This makes electrolytic cells stack particularly easily and safely.

WEW Hydrogen electrolyzer

The diagram below depicts the structure of the WEW electrolytic cell.

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