For alkaline anion-exchange membrane electrolysers and fuel cells to become a technological reality, hydroxide-ion (OH) conducting membranes that are flexible, robust, affording high OH conductivity, and synthesised in a low-cost and scalable way must be developed. In this paper, we engineer a stable, self-supporting, and flexible fibre mat using a low-cost ZIF-8 metal-organic framework composited with ionic liquid tetrabutylammonium hydroxide and widely used polyacrylonitrile as polymeric backbone. We obtain mats with a high intrinsic OH conductivity for a metal-organic framework-based material already at room temperature, without added ion-conductor polymers.
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