AEM water electrolysis explained: what changes when the membrane is anionic
Alkaline electrolysis is inexpensive but slow. PEM is fast but tied to iridium and PFAS. AEM keeps the solid membrane and moves it into an alkaline environment, and this is what that changes, what it has not solved, and where the technology stands measured.
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Alkaline, PEM or AEM: how to choose an electrolysis technology
There is no best electrolysis technology, only the one whose limits your project can live with. This is the set of questions that decides the answer, and what each of the three technologies is actually chosen for.
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Electrolyzer efficiency: what the number means and how to compare it
Two electrolyzers quoted at 75% and 64% can be the same machine. Efficiency figures move with the heating value basis, the measurement boundary, the current density and the age of the stack, and this is how to read one properly.
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What is an electrolyzer stack, and what decides how well it works
A stack is cells in series, held at the right pressure and fed the same electrolyte. Most of what separates a good stack from a bad one is not the chemistry inside the cells but the mechanical engineering between them.
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What is an MEA, and why it decides an electrolyzer's performance
The membrane electrode assembly is the layer stack where water is actually split. It sets the efficiency ceiling of everything built around it, and most of its performance is decided at the interfaces rather than by the ingredients.
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Technical notes cover our own measurements and the conditions they were taken under.
Technical notes and news