Journal
JOURNAL OF MATERIALS SCIENCE
Volume 48, Issue 19, Pages 6833-6840Publisher
SPRINGER
DOI: 10.1007/s10853-013-7489-0
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Funding
- FEDER funds
- FCT-Fundacao para a Ciencia e a Tecnologia [PTDC/CTM/69316/2006, NANO/NMed-SD/0156/2007, Pest-C/QUI/UIO686/2011, FRH/BD/68499/2010, SFRH/BD/66930/2009, SFRH/BPD/63148/2009]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/66930/2009, PTDC/CTM/69316/2006, NANO/NMed-SD/0156/2007] Funding Source: FCT
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Battery separators based on electrospun membranes of poly(vinylidene fluoride) (PVDF) 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 similar to 272 nm and a degree of porosity of similar to 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 PVDF are appropriate for battery separators in lithium-ion battery applications, the random membranes showing a better overall performance.
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