Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/22700

TitleEffect of the microsctructure and lithium-ion content in poly[(vinylidene fluoride)-co-trifluoroethylene]/ lithium perchlorate trihydrat composite membranes for battery applications
Author(s)Costa, Carlos M.
Rodrigues, L. C.
Sencadas, Vítor João Gomes Silva
Silva, Maria Manuela
Lanceros-Méndez, S.
KeywordsSolid polymer electrolyte
P(VDF-TrFE)
Lithium-ions
Ionic conductivity
Issue date8-Jun-2012
PublisherElsevier
JournalSolid State Ionics
Abstract(s)Poly[(vinylidene fluoride)-co-trifluoroethylene] membranes doped with different lithium perchlorate trihydrat contents have been produced by solvent evaporation at different temperatures in order to tailor membrane morphology and characterized by infrared spectroscopy, thermal and mechanical analysis techniques. Electrochemical properties of the composite membranes for battery applications were determined through complex impedance spectroscopy and cyclic voltammetry. The polymer phase and molecular main features of the polymer do not depend on lithium ion content and crystallization temperature. Higher crystallization temperatures allow obtaining more porous polymer microstructures which strongly influences the electrical response. The degree of crystallinity and ionic conductivity, on the other hand, are related to lithium ion content. The obtained ionic conductivity determined by impedance spectroscopy increases with increasing lithium ion content. The most conducting electrolyte composition, PVDF-TrFE 1.5LiClO4.3H2O exhibits 2.3x10-6 S cm-1 and corresponds to the membrane crystallized at room temperature, i.e. the most porous membrane.
TypeArticle
URIhttp://hdl.handle.net/1822/22700
DOI10.1016/j.ssi.2012.04.011
ISSN0167-2738
Publisher versionhttp://ac.els-cdn.com/S0167273812002470/1-s2.0-S0167273812002470-main.pdf?_tid=46f274f4-60d7-11e2-b9e0-00000aacb35d&acdnat=1358449030_fa7c9593fdffe8bcf7496b5e967f23c0
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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