Interest in hydrogen energy storage is growing due to the much higher storage capacity compared to batteries (small scale) or pumped hydro and CAES (large scale), despite its comparatively low efficiency. Electricity can be converted into hydrogen by electrolysis.. Hydrogen storage is a key enabling technology for the advancement of hydrogen and fuel cell technologies in applications including stationary power, portable power, and transportation. Of course, there are several issues still to be tackled. Important for green hydrogen production is.
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