Proton-exchange membrane

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Notion

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Science and technology

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What Wikipedia says

A proton-exchange membrane, or polymer-electrolyte membrane (PEM), is a semipermeable membrane generally made from ionomers and designed to conduct protons while acting as an electronic insulator and reactant barrier, e.g. to oxygen and hydrogen gas.

Excerpt from the Wikipedia article “Proton-exchange membrane”, under the CC BY-SA 4.0 license. Read the article on Wikipedia