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Hun Lee, Mataz Alcoutlabi, Jill V. Watson and Xiangwu Zhang Polyvinylidene fluoride-co-chlorotrifluoroethylene and polyvinylidene fluoride-co-hexafluoropropylene nanofiber-coated polypropylene microporous battery separator membranes Journal of Polymer Science Part B: Polymer Physics 51

Version of Record online: 27 NOV 2012 | DOI: 10.1002/polb.23216

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A new type of battery separator membrane is developed by coating a traditional microporous membrane separator with electrospun polyvinylidene fluoride copolymer nanofibers. The electrospun nanofibers have diameters between 100 and 200 nm and form an interconnected network on the microporous membrane substrate but do not interfere with the microporous structure of membrane substrate. The addition of the polymer nanofibers to the separator membrane improves the electrolyte uptake capacities and separator-electrode adhesion properties for use in batteries.

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