Synthesis and properties of VDF-based perfluorsulfonic acid polymers for proton-exchange membrane fuel cells.
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PEMFC is widely used as an alternative energy conversion device due to its high energy efficiency and environment-friendly characteristics. PFSA polymers are the most commonly used materials for membranes for fuel cells due to their superior chemical and mechanical stabilities. However, typical PFSA polymers with TFE backbone have great difficulty in processing them to membrane, due to their pure solubilities in common solvents. In addition, their restricted molecular frameworks do not provide the diversity in the molecular structure, leading to inhibiting the extension of applicable areas. To overcome the limitations of typical PFSA polymers, this study suggests the VDF-based molecular structure diversification. Their structures could be diversified and systematically analyzed using their films. It is believe that our F-ionomers can provide new insights in fuel cell membrane applications.