Preprint Article Version 1 This version is not peer-reviewed

Ionic Liquid-Based Electrolyte Membranes for Medium-High Temperatures Lithium Polymer Batteries

Version 1 : Received: 11 June 2018 / Approved: 12 June 2018 / Online: 12 June 2018 (10:02:49 CEST)

A peer-reviewed article of this Preprint also exists.

Kim, G.-T.; Passerini, S.; Carewska, M.; Appetecchi, G.B. Ionic Liquid-Based Electrolyte Membranes for Medium-High Temperature Lithium Polymer Batteries. Membranes 2018, 8, 41. Kim, G.-T.; Passerini, S.; Carewska, M.; Appetecchi, G.B. Ionic Liquid-Based Electrolyte Membranes for Medium-High Temperature Lithium Polymer Batteries. Membranes 2018, 8, 41.

Journal reference: Membranes 2018, 8, 41
DOI: 10.3390/membranes8030041

Abstract

Li+-conducting polyethylene oxide-based membranes, incorporating the N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, are 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, allow 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, never tackled by ionic liquid-free polymer electrolytes. No dendrite growth onto the lithium metal anode was observed.

Subject Areas

Ionic liquids; N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide; Poly(EthyleneOxide); Polymer electrolytes; Lithium polymer batteries

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