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Both O2 and H2 are envisioned to be used in a variety of processes including crew life support, spacecraft propulsion, extravehicular activity, electrical power generation/storage as well as in scientific experiment and manufacturing processes. ...The energy storage application utilizes O2 and H2 as reactants for a fuel cell. The propulsion application utilizes high pressure O2 and H2 as propellants. The EVA application utilizes ultrahigh pressure O2 to recharge the O2 bottle in the extravehicular mobility unit.

The Static Feed Electrolyzer technology is a very efficient tool for generating oxygen and hydrogen for various applications including propulsion, energy storage, life support and oxygen recharge for Extravehicular Activity. Life Systems, Inc., in conjunction with the National Aeronautics and Space Administration, has been developing an alkaline-based Static Feed Electrolyzer.