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Sulfonated poly(ether ether ketone) (SPEEK) and poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-co-HFP)) composite membranes are prepared and investigated in detail for vanadium redox flow battery (VRFB) application. With the high hydrophobicity and stability of P(VDF-co-HFP), the properties of composite membranes such as mechanical property and vanadium ion permeability are effectively improved,...
A novel composite membrane of sulfonated poly(ether ether ketone) (SPEEK) and graphene was prepared and investigated in this paper. The scanning electron microscopy images of the composite membrane revealed the presence and the uniformity dispersion of graphene in the SPEEK matrix. The properties of the obtained composite membrane, including the water uptake, swelling ratio, ion exchange capacity...
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