POS6-1260
Spray-Coated Bipolar Membranes for Water Electrolysis: Effects of Catalyst Loading and a Novel Anion-Conductive Ionomer
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Yumi Hidaka (Tokyo Metropolitan University)
Co-Author(s)
Abstract
Hydrogen is an essential energy carrier for a sustainable society and a promising option for energy transport and storage. Accordingly, further development of hydrogen production using renewable electricity through water electrolysis is required. Among the various water electrolysis technologies, bipolar membrane (BPM) water electrolysis has attracted increasing attention because it enables operation under different pH environments at the anode and cathode, allowing each electrode reaction to proceed under its optimal conditions. As a result, BPM water electrolysis has the potential to achieve highly efficient hydrogen production at lower cell voltages than conventional water electrolysis systems.
In BPM water electrolysis, the loading of the water dissociation catalyst at the interface between the anion exchange layer (AEL) and the cation exchange layer (CEL) strongly influences electrolysis performance. In addition, the properties of the anion-conductive ionomer used in the catalyst layer, as well as the fabrication method of each ion-conductive layer, are also important factors for achieving high-performance BPMs.
However, the effects of these parameters have not yet been systematically investigated, and further performance improvements are required. One of the challenges for effective screening is how to fabricate membranes with desired catalyst loading and controlled thickness.
In this study, a spray-coating strategy was applied to the fabrication of BPMs for water electrolysis, in order to realize systematic screening of various factors such as catalyst loading and AEL fabrication methods. A novel anion-conductive polymer was also synthesized as an ionomer for the catalyst layer. The effects of these factors on the performance of BPM water electrolysis were then evaluated.
In BPM water electrolysis, the loading of the water dissociation catalyst at the interface between the anion exchange layer (AEL) and the cation exchange layer (CEL) strongly influences electrolysis performance. In addition, the properties of the anion-conductive ionomer used in the catalyst layer, as well as the fabrication method of each ion-conductive layer, are also important factors for achieving high-performance BPMs.
However, the effects of these parameters have not yet been systematically investigated, and further performance improvements are required. One of the challenges for effective screening is how to fabricate membranes with desired catalyst loading and controlled thickness.
In this study, a spray-coating strategy was applied to the fabrication of BPMs for water electrolysis, in order to realize systematic screening of various factors such as catalyst loading and AEL fabrication methods. A novel anion-conductive polymer was also synthesized as an ionomer for the catalyst layer. The effects of these factors on the performance of BPM water electrolysis were then evaluated.
