Universal Fluorine-Free Proton Exchange Polymers for High-Performance and Durable Fuel Cells Operable Under Severe
Fanghua Liu1, Kenji Miyatake1,2,3, Ick Soo Kim4
1Clean Energy Research Center, University of Yamanashi, Kofu, Yamanashi, Japan.
Advanced Materials (Deerfield Beach, Fla.)
|February 3, 2026
Summary
Novel fluorine-free proton exchange membranes (PEMs) overcome limitations of traditional PFSA membranes. These advanced PEMs demonstrate superior proton conductivity and durability, offering a sustainable alternative for fuel cell applications.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Perfluorosulfonic acid (PFSA) membranes face environmental and cost challenges.
- Fluorine-free proton exchange membranes (PEMs) exhibit lower proton conductivity and stability.
- Developing high-performance, eco-friendly PEMs is crucial for advanced energy systems.
Purpose of the Study:
- To engineer novel fluorine-free PEMs with enhanced properties.
- To address the limitations of existing fluorine-free PEMs.
- To provide a sustainable alternative to PFSA membranes.
Main Methods:
- Synthesized novel fluorine-free PEMs with aliphatic backbone chains.
- Incorporated physical reinforcement for enhanced mechanical and chemical stability.
- Conducted rigorous testing under accelerated durability conditions.
Main Results:
- Achieved 2.6 times higher proton conductivity compared to PFSA membranes.
- Demonstrated a 335.1-fold increase in lifetime after physical reinforcement.
- Outperformed state-of-the-art Nafion XL membranes, especially at elevated temperatures.
Conclusions:
- The developed fluorine-free PEMs offer a viable and superior alternative to PFSA membranes.
- These membranes exhibit excellent performance, durability, and environmental benefits.
- The findings support the practical application of these novel PEMs in demanding conditions.
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