Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: Poster Session 3
CPP 54.17: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Block copolymer based membrane for lithium ion microbatteries — •Majid Rasool1, Ezzeldin Metwalli1, Hans Beyer2, Anna Eberle2, Hubert A. Gasteiger2, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — 2TU München, Chemistry Department, LS Technische Elektrochemie, Lichtenbergstr. 4, 85748 Garching
In the light of an increasing demand on power sources for nanodevices, the nano-scaled lithium based membranes paves the way for new opportunities regarding design and application. The morphology of lithium ion-polymer hybrid films [1] based on P(S-b-EO) block copolymer (BC) electrolyte is investigated using small angle x-ray scattering (SAXS). Additionally, lithium containing BC films are sandwiched between two metal electrodes and the film conductivity at different temperatures and salt concentrations is measured using impedance spectroscopy. The current block copolymer electrolyte consists of both conductive lithium containing PEO domains as well as mechanically stable glassy polystyrene domains. Lithium ion incorporation is found to inhibit the crystallization of PEO block, enhance microphase separation and induce lamella-cylinder morphological transition at high lithium ion content. The correlation between the morphology and ionic conductivity of the current lithium ion-polymer hybrid BC films is employed to put an insight into the mechanisms responsible for the conduction of lithium ions in these systems. [1] E. Metwalli, et al., Macromol. Chem. Phys. 212, 1742 (2011).