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Membranes 2018, 8(3), 45; https://doi.org/10.3390/membranes8030045

Recent Advances in Poly(vinylidene fluoride) and Its Copolymers for Lithium-Ion Battery Separators

1
Centro de Física, Universidade do Minho, 4710-057 Braga, Portugal
2
BCMaterials, Basque Center Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
3
IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
4
Centro de Química, Universidade do Minho, 4710-057 Braga, Portugal
Equal contribution.
*
Author to whom correspondence should be addressed.
Received: 29 June 2018 / Revised: 11 July 2018 / Accepted: 12 July 2018 / Published: 19 July 2018
(This article belongs to the Special Issue Membranes for Lithium Batteries)
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Abstract

The separator membrane is an essential component of lithium-ion batteries, separating the anode and cathode, and controlling the number and mobility of the lithium ions. Among the polymer matrices most commonly investigated for battery separators are poly(vinylidene fluoride) (PVDF) and its copolymers poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), and poly(vinylidene fluoride-cochlorotrifluoroethylene) (PVDF-CTFE), due to their excellent properties such as high polarity and the possibility of controlling the porosity of the materials through binary and ternary polymer/solvent systems, among others. This review presents the recent advances on battery separators based on PVDF and its copolymers for lithium-ion batteries. It is divided into the following sections: single polymer and co-polymers, surface modification, composites, and polymer blends. Further, a critical comparison between those membranes and other separator membranes is presented, as well as the future trends on this area. View Full-Text
Keywords: PVDF; copolymers; battery separator; lithium-ion batteries PVDF; copolymers; battery separator; lithium-ion batteries
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Barbosa, J.C.; Dias, J.P.; Lanceros-Méndez, S.; Costa, C.M. Recent Advances in Poly(vinylidene fluoride) and Its Copolymers for Lithium-Ion Battery Separators. Membranes 2018, 8, 45.

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