Advancements in hydrogen production using alkaline electrolysis systems: A short review on experimental and simulation studies

Although alkaline water electrolysis (AWE) is a highly mature technology for hydrogen production, its potential is hindered by relatively low efficiencies at high current densities. On the other hand, to conform with “RePowerEU” directives, coupling electrolyzers with new renewable energy sources (R...

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Published inCurrent opinion in electrochemistry Vol. 47; p. 101552
Main Authors Campo Schneider, Lucía Paula, Dhrioua, Maryem, Ullmer, Dirk, Egert, Franz, Wiggenhauser, Hans Julian, Ghotia, Kamal, Kawerau, Nicolas, Grilli, Davide, Razmjooei, Fatemeh, Ansar, Syed Asif
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2024
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Summary:Although alkaline water electrolysis (AWE) is a highly mature technology for hydrogen production, its potential is hindered by relatively low efficiencies at high current densities. On the other hand, to conform with “RePowerEU” directives, coupling electrolyzers with new renewable energy sources (RES) is highly demanded. However, integrating fluctuating RES poses challenges for the AWE due to increasing gas impurity as the current density decreases. Herein, we revised the most promising recent developments in materials, cell design, and system integration aimed at conquering the aforementioned challenges. It is shown that the implementation of advanced components and control strategies, e.g. electrolyte management, is vital to enhance the efficiency at high current densities and expand the load range of operation by maintaining the high gas purity.
ISSN:2451-9103
DOI:10.1016/j.coelec.2024.101552