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Ionic liquid-based electrolyte membranes for medium-high temperature lithium polymer batteriess

TitleIonic liquid-based electrolyte membranes for medium-high temperature lithium polymer batteriess
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2018
AuthorsKim, G.-T., Passerini S., Carewska M., and Appetecchi Giovanni Battista
KeywordsAll-solid state lithium polymer batteries, Anodes, Electrochemical stabilities, Electrolyte separator, Interfacial property, Ionic liquids, Ionic-liquid based electrolytes, Lithium batteries, Lithium-ion batteries, Medium-High temperatures, Nbutyl-n-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, Polyelectrolytes, Polyethylene oxides, Polymer electrolyte, Solid electrolytes

Li+-conducting polyethylene oxide-based membranes incorporating N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide are used as electrolyte separators for all-solid-state lithium polymer batteries operating at medium-high temperatures. The incorporation of the ionic liquid remarkably improves the thermal, ion-transport and interfacial properties of the polymer electrolyte, which, in combination with the wide electrochemical stability even at medium-high temperatures, allows high current rates without any appreciable lithium anode degradation. Battery tests carried out at 80 °C have shown excellent cycling performance and capacity retention, even at high rates, which are never tackled by ionic liquid-free polymer electrolytes. No dendrite growth onto the lithium metal anode was observed. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.


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Citation KeyKim2018