RPI ID: 2019-016-401
Innovation Summary: This invention introduces a new class of ion-exchange membranes synthesized from olefin/norbornene copolymers with tunable rigidity. By incorporating haloalkyl side chains via Friedel-Crafts alkylation and subsequently replacing halides with ionic groups, the membranes achieve superior ion conductivity and chemical stability. The polymer backbone’s ratio of olefin to cyclic olefin provides mechanical adjustability for durability and flexibility across conditions. This design addresses long-standing challenges in creating anion exchange membranes (AEMs) with sufficient stability at high pH and elevated temperatures. The membranes can be manufactured using scalable synthetic routes that are compatible with industrial processes. The ability to fine-tune properties makes them suitable for fuel cells, electrolyzers, and advanced batteries. They present a potential low-cost alternative to proton exchange membranes that require expensive platinum group catalysts. This material could enable widespread adoption of alkaline-based electrochemical devices.
Challenges/Opportunities: Achieving long-term chemical stability of membranes under harsh alkaline conditions remains a challenge for deployment. The synthesis process requires precise control of grafting and substitution reactions, which may complicate scaling. Competing membrane technologies are already commercially available, making differentiation critical for market adoption. Industrial validation under real-world electrochemical cycling conditions is required. However, opportunities exist to replace expensive PEM-based systems with lower-cost alkaline systems using these membranes. The membranes’ tunable rigidity allows optimization for both stationary energy systems and portable applications. There is potential for licensing in renewable energy, hydrogen production, and grid-scale storage markets. Strategic collaborations with fuel cell and electrolyzer manufacturers could accelerate commercialization.
Key Benefits: ✓ Tunable rigidity and conductivity ✓ Enhanced stability at high pH and elevated temperatures ✓ Lower-cost alternative to PEMs ✓ Scalable synthesis methods ✓ Compatible with multiple electrochemical devices
Applications: • Fuel cells • Electrolyzers • Advanced batteries • Hydrogen production • Grid-scale energy storage
Keywords: Ion-exchange membrane, olefin, norbornene, alkaline fuel cell, electrolyzer, energy storage
Intellectual Property: Issued US Patent No. US12410289B2