Ultra-stable Anion Exchange Membrane for Solar-to-Hydrogen Generation

We propose a unique design approach for enabling ultra-stable, high conductivity anion exchange membranes for solar-to-hydrogen generation applications. The innovation is targeted to address performance deficiencies in state-of-the-art membranes relating to conductivity, durability and permeability and was identified after analyzing the conduction and degradation mechanisms. The proposed design will target hydroxide ionic conductivities > 100 mS cm-1 while demonstrating stable operation for extended periods (>2000 hrs) in base bath solutions of 6 M potassium (or sodium) hydroxide solutions from room temperature to 80oC. Phase I will finalize target performance metrics and requirements, synthesize the designed membranes, and test them both separately and in a fabricated solar-to-hydrogen photoelectrochemical cell, as well as perform an economic analysis study. The resulting membrane should exhibit higher conductivity, superior stability, and lower permeability than state-of-the-art membranes and will meet the requirement for solar-to-hydrogen generation applications. With success, the membrane will significantly enhance higher efficiency for solar to hydrogen systems as well as lower hydrogen production costs. Our innovation offers a higher conductivity, superior stability, and lower permeability than state-of-the-art anion exchange membranes and will significantly enhance higher efficiency for solar to hydrogen systems as well as lower hydrogen production costs, which will facilitate the on-site hydrogen productions.