In situ SANS investigation of block copolymer electrolyte under lithium stripping/platting cycling
For lithium-ion battery, nanostructured lithium-ion-doped polystyrene-block-polyethylene oxide (PS-b-PEO) diblock copolymer electrolyte has been proved as an advantageous membrane over the polyethylene (PEO) homopolymer. The conductive PEO block has the ability to solvate lithium ions, while the glassy polystyrene (PS) block offers a mechanically stable membrane, especially at elevated temperatures. Owing to possible morphological modification of the electrolyte and dendrite formation on the surface of the lithium metal anode, failure of a battery is a fast process. The proposed SANS experiment aims at investigating the evolved morphological modification of lithium-ion containing DBC electrolyte as well as the electrode-electrolyte interface stability during galvanostatic charge and discharge cycling in Li/membrane/Li cell at different temperatures. The in situ SANS investigation along with the measured resistance of the cell will provide important information on the electrolyte structure-property relationship as well as on the possible rapid battery failure mechanisms.
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METWALLI Ezzeldin; CUBITT Robert; HEROLD Christian; KAEPPEL Max; MUELLER BUSCHBAUM Peter; SCHAPER Simon and SPRINGER Bernhard. (2016). In situ SANS investigation of block copolymer electrolyte under lithium stripping/platting cycling. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1804
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