• Proton Exchange Membrane Electrolysis Cell (PEMEC):
working temperature <80°C, ionic species are hydronium ions (H+), perfluorosulfonic acid membranes as solid electrolytes
• Anion Exchange Membrane Electrolysis Cell (AEMEC):
working temperature <80°C, ionic species are Hydroxyl ions (OH-), anion exchange membranes as solid electrolytes
• Alkaline Electrolysis Cell (AEC):
working cell temperature 700°C, ionic species are oxide ions (O2−), Yttrium stabilized Zirconia as solid electrolytes