Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/31988

TitlePoly(vinylidene fluoride)-based, co-polymer separator electrolyte membranes for lithium-ion battery systems
Author(s)Costa, C. M.
Gomez Ribelles, J. L.
Lanceros-Méndez, S.
Appetecchi, G. B.
Scrosati, B.
KeywordsPoly(vinylidene fluoride) copolymers
Polymeric blends
Gel polymer electrolytes
Lithium battery applications
Issue dateJan-2014
PublisherElsevier
JournalJournal of Power Sources
CitationCosta, C. M., Gomez Ribelles, J. L., Lanceros-Méndez, S., Appetecchi, G. B., & Scrosati, B. (2014). Poly (vinylidene fluoride)-based, co-polymer separator electrolyte membranes for lithium-ion battery systems. Journal of Power Sources, 245, 779-786.
Abstract(s)In the present paper we report and discuss the physicochemical properties of novel electrolyte membranes, based on poly(vinylidenefluoride-co-trifluoroethylene), PVdF-TrFE, and poly(vinylidenefluorideco- hexafluoropropylene), PVdF-HFP, co-polymer hosts and the PVdF-TrFE/poly(ethylene oxide (PEO) blend as separators for lithium battery systems. The results have shown that the examined separator membranes, particularly those based on the PVdF co-polymers, are able to uptake large liquid amounts leading to high ionic conductivity values. Tests performed on Li/LiFePO4 and Li/SneC cells have revealed very good cycling performance even at high current rates and 100% of DOD, approaching the results achieved in liquid electrolytes. A capacity fading lower than 0.002% per cycle was observed. Particularly, the Li/LiFePO4 cathode cells have exhibited excellent rate capability, being still able to deliver at 2C above 89% of the capacity discharged at 0.1C. These results, in conjunction with the about 100% coulombic efficiency, suggest very good electrolyte/ electrode compatibility, which results from the high purity and stability of the electrolyte and electrode materials and the cell manufacturing.
TypeArticle
URIhttp://hdl.handle.net/1822/31988
DOI10.1016/j.jpowsour.2013.06.151
ISSN0378-7753
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S0378775313011580
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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