sPPO/PVdF/UAN Blend Membrane for Vanadium Redox Flow Battery

초록

Poly(phenylene oxide) (PPO) is sulfonated for application of vanadium redox flow battery (VRFB). To improve dimensional unstability of sPPO membrane, hydrophobic poly(vinylidenedifluoride)(PVdF) is introduced. To improve the phase separation between hydrophilic and hydrophobic polymers, blend membrane is made using amphiphilic polymer, urethane acrylate non-ionomer (UAN). Fundamental characterization of polymer membrane and cell performance of VRFB are carried out based on sPPO/PVdF/UAN blend membrane. Blend membrane shows increased sPPO/PVdF interface stability as UAN content increases. The interface stability of blend membrane decreases cell resistance and permeability which leads to improvement in VRFB's efficiency.

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