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TitleEffect of fiber orientation in gelled poly(vinylidene fluoride) electrospun membranes for Li-ion battery applications
Author(s)Costa, C. M.
Pereira, J. Nunes
Sencadas, Vítor João Gomes Silva
Silva, Maria Manuela
Lanceros-Méndez, S.
Battery separators
Fiber alignment
Issue date2013
JournalJournal of Materials Science
Abstract(s)Battery separators based on electrospun membranes of poly(vinylidene fluoride) have been prepared in order to study the effect of fiber alignment on the performance and characteristics of the membrane. The prepared membranes show an average fiber diameter of ~272 nm and a degree of porosity of ~ 87%. The gel polymer electrolytes are prepared by soaking the membranes in the electrolyte solution. The alignment of the fibers improves the mechanical properties for the electrospun membranes. Further, the microstructure of the membrane also plays an important role in the ionic conductivity, being higher for the random electrospun membrane due to the lower tortuosity value. Independently of the microstructure, both membranes show good electrochemical stability up to 5.0 V versus Li/Li+. These results show that electrospun membranes based on poly(vinylidene fluoride) are appropriate for battery separators in lithium ion battery applications, the random membranes showing a better overall performance.
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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