
"Innovative thin-film coatings could revolutionize the performance of zinc-air batteries."

In this latest interview, we sit down with Iklime Kayhan, R&D engineer at ADVENST, a company at the cutting edge of energy storage solutions. ADVENST is actively contributing to the HIPERZAB project, a European initiative that aims to develop high-performing, electrically rechargeable zinc-air batteries. In this conversation, Iklime sheds light on the critical role of the Gas Diffusion Layer (GDL) in the performance of zinc-air batteries and the innovative work ADVENST is doing to overcome existing challenges.
What is the role of the Gas Diffusion Layer (GDL) in a Zinc-Air Battery (ZAB)?
"The role of the Gas Diffusion Layer in zinc-air batteries (ZABs) with alkaline electrolyte can be understood through two key functions:
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Oxygen Transport: A conventional GDL is designed to be porous, allowing oxygen molecules from the air to diffuse through its structure and reach the catalyst-electrolyte interface in the cathode. This is essential for the Oxygen Reduction Reaction (ORR) to occur during discharge. In an electrically rechargeable ZAB, the GDL also manages oxygen gas produced during the Oxygen Evolution Reaction (OER) when charging, directing it to the external environment.
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Electrolyte Management: The GDL helps manage moisture uptake, preventing flooding in the cathode. On the other hand, it prevents excessive water evaporation from the electrolyte. Hydrophobic treatment of the GDL maintains the air channels open within the electrode, ensuring continuous oxygen supply."
How does ADVENST innovate within HIPERZAB?
"Most commercially available GDLs still face issues with electrolyte management. To address these without sacrificing oxygen transport, we at ADVENST are developing thin-film copolymer materials that improve the performance of conventional GDLs. These ultra-thin coatings can enhance conventional GDLs or even function as stand-alone GDLs when applied as coatings on the catalyst layer. We’re pushing the boundaries of GDL technology with a focus on sustainability and performance."
As Iklime Kayhan explained, the development of an effective Gas Diffusion Layer is crucial for the success of zinc-air batteries. By improving oxygen transport and electrolyte management, ADVENST’s innovations could significantly enhance the performance of rechargeable zinc-air batteries, paving the way for cleaner and more efficient energy storage. The HIPERZAB project represents a major step forward in making this technology commercially viable, and the breakthroughs being achieved have the potential to revolutionize the energy storage market. Keep an eye on this project as it progresses—exciting developments are on the horizon.