Badanie zjawisk związanych z transportem jonów litu w elektrolitach polimerowych

Beata Misztal-Faraj

Abstract

The aim of this work were the investigations of phenomena connected with lithium ion transport in some gel polyelectrolytes and polymer electrolytes based on PEO. The studied materials were different ion conducting polymers, including high molecular PEO with disolved lithium salts: LiCI04, LiCF3S03 and LiN(CF3S02)2 which has properties of plasticizer. The aim of plastification was to obtain the material of high ion conduction. PEO purified, composites of PEO and diethylaluminum carboksylate and some gel polyelectrolytes were also studied. Electrical properties were examined by means of impedance spectroscopy. The values of transference numbers of lithium ions of studied systems were obtained and passivation layers formed at the interface with lithium electrode were characterized. In particular these investigations showed that passivation layers formed during interaction between gel polyelectrolytes and lithium metal are unstable and during passivation process mobile anions are created. Temperature dependence of conductivity and frequency of dielectric relaxation in aU investigated polymer electrolytes generally was described by VTF function (Vogel-Tamma-Fulcher) function, which suggests that transport of cations in these materials is supported by relaxation segmental movement of polymeric matrix. In case of electrolytes based on PEO results confirmed existence of dispersion of conductivity as a result of inhomogenity of the material.
Diploma typeDoctor of Philosophy
Author Beata Misztal-Faraj (FP / SSID)
Beata Misztal-Faraj,,
- Solid State Ionics Division
Title in PolishBadanie zjawisk związanych z transportem jonów litu w elektrolitach polimerowych
Languagepl polski
Certifying UnitFaculty of Physics (FP)
Disciplinephysics / (physical sciences domain) / (physical sciences)
Defense Date18-10-2001
Supervisor Franciszek Krok (FP / SSID)
Franciszek Krok,,
- Solid State Ionics Division

Pages140
Keywords in Polishelektrochemia, transport jonów, elektrolity polimerowe, polielektrolity, lit, prace doktorskie
Abstract in EnglishThe aim of this work were the investigations of phenomena connected with lithium ion transport in some gel polyelectrolytes and polymer electrolytes based on PEO. The studied materials were different ion conducting polymers, including high molecular PEO with disolved lithium salts: LiCI04, LiCF3S03 and LiN(CF3S02)2 which has properties of plasticizer. The aim of plastification was to obtain the material of high ion conduction. PEO purified, composites of PEO and diethylaluminum carboksylate and some gel polyelectrolytes were also studied. Electrical properties were examined by means of impedance spectroscopy. The values of transference numbers of lithium ions of studied systems were obtained and passivation layers formed at the interface with lithium electrode were characterized. In particular these investigations showed that passivation layers formed during interaction between gel polyelectrolytes and lithium metal are unstable and during passivation process mobile anions are created. Temperature dependence of conductivity and frequency of dielectric relaxation in aU investigated polymer electrolytes generally was described by VTF function (Vogel-Tamma-Fulcher) function, which suggests that transport of cations in these materials is supported by relaxation segmental movement of polymeric matrix. In case of electrolytes based on PEO results confirmed existence of dispersion of conductivity as a result of inhomogenity of the material.
Thesis file
Misztal_Faraj_Beata_badanie.pdf 5.24 MB
Citation count*4 (2015-07-23)

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