Year: 2024
Type: review
Abstract: Traditionally, alkaline water electrolysis (AWE) uses diaphragms to separate anode and cathode and is operated with 5-7 M KOH feed solutions. The ban of asbestos diaphragms led to the development of polymeric diaphragms, which are now the state of the art material. A promising alternative is the ion solvating membrane. Recent developments show that high conductivities can also be obtained in 1 M KOH. A third technology is based on anion exchange membranes (AEM); because these systems use 0-1 M KOH feed solutions to balance the trade-off between conductivity and the AEM's lifetime in alkaline environment, it makes sense to treat them separately as AEM WE. However, the lifetime of AEM increased strongly over the last 10 years, and some electrode-related issues like oxidation of the ionomer binder at the anode can be mitigated by using KOH feed solutions. Therefore, AWE and AEM WE may get more similar in the future, and this review focuses on the developments in polymeric diaphragms, ion solvating membranes, and AEM.
Source: Chemical Reviews
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: European Commission, Stiftelsen för Strategisk Forskning, Ministry of Trade, Industry and Energy, Korea Institute of Science and Technology, National Research Foundation of Korea, Korea Electric Power Corporation, Fuel Cells and Hydrogen Joint Undertaking, Stiftelsen för Strategisk Forskning, Horizon 2020 Framework Programme, Korea Institute of Energy Technology Evaluation and Planning
Awards: G1057304609, MATERIALS FOR NEXT GENERATION ALKALINE ELECTROLYZER, G3011877142, G3393257642, G434337789, G4785704845, G599426666, G6207285955, Material för effektiva och konkurrenskraftiga bränsleceller, G6365609755, G6536842589, Produktion, användning och lagring av vätgas (PUSH), G706815331, Next Generation Alkaline Membrane Water Electrolysers with Improved Components and Materials, G7224199237, G7405348630, G7665846259
OpenAlex ID: W4395660633