Dresden 2017 – wissenschaftliches Programm
CPP 51.6: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P3
Morphology of lithium-ion containing block copolymer electrolytes for rechargeable lithium-ion batteries — •Yinong Zhang, Ezzeldin Metwalli, Bernhard Springer, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching
Block copolymers (BC) electrolytes have been recently investigated as solid-state membranes for lithium-ion batteries. Nanostructured BC electrolyte contains both, the ionic conducting as well as the high-tensile polymer domains, enabling both, high ionic conductivity and improved mechanical stability. Since the diffusion path of the lithium-ions only follows the percolation path of the ionic conducting domain, the morphology of the BC electrolyte is an essential parameter. Theoretical studies have recently reported that the BC electrolyte phase diagrams significantly deviate from the conventional BC phase diagrams due to electrostatic interactions between polar chains and the alkali metal-ions. The morphology of ion-containing BC electrolyte was investigated using SEM and SAXS. In the current study, morphological deviation compared with that of the conventional BC phase diagrams in consistent with the theoretical studies is experimentally proved. Conductivity measurements of the Li-salt containing BC hybrid films were examined for different morphologies using impedance spectroscopy.