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Crosslinking of poly(vinylene fluoride) separators by gamma-irradiation for electrochemical high power charge applications

: Karabelli, D.; Leprêtre, J.-C.; Dumas, L.; Rouif, S.; Portinha, D.; Fleury, E.; Sanchez, J.-Y.


Electrochimica Acta 169 (2015), S.32-36
ISSN: 0013-4686
Fraunhofer ICT ()

Macroporous poly(vinylene fluoride) (PVdF) separators were prepared by phase inversion method and introduced to a gamma (γ) radiation with and without cross-linking agents. Triallyl isocyanurate (TAIC) and a macromonomer of ethylene oxide- propylene oxide (MEP) were used as a cross-linking agent. The resulting membranes were characterized in terms of thermal and mechanical properties. Ionic conductivities were determined in a molar solution of tetraethylammonium tetrafluoroborate (TEABF4) in acetonitrile (AN) and propylene carbonate (PC). Excellent mechanical properties (250 MPa at 25 °C) and conductivities (14 mS cm−1) were obtained for the cross-linked separator prepared with TAIC.