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Membranes 2018, 8(3), 55; https://doi.org/10.3390/membranes8030055

High Performance Polymer/Ionic Liquid Thermoplastic Solid Electrolyte Prepared by Solvent Free Processing for Solid State Lithium Metal Batteries

1
Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
2
CIDETEC Energy Storage, Parque Científico y Tecnológico de Gipuzkoa, Paseo Miramón 196, 20009 Donostia-San Sebastián, Spain
*
Authors to whom correspondence should be addressed.
Received: 6 July 2018 / Revised: 25 July 2018 / Accepted: 26 July 2018 / Published: 2 August 2018
(This article belongs to the Special Issue Membranes for Lithium Batteries)
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Abstract

A polymer/ionic liquid thermoplastic solid electrolyte based on poly(ethylene oxide) (PEO), modified sepiolite (TPGS-S), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and 1-Butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) ionic liquid is prepared using solvent free extrusion method. Its physical-chemical, electrical, and electrochemical properties are comprehensively studied. The investigated solid electrolyte demonstrates high ionic conductivity together with excellent compatibility with lithium metal electrode. Finally, truly Li-LiFePO4 solid state coin cell with the developed thermoplastic solid electrolyte demonstrates promising electrochemical performance during cycling under 0.2 C/0.5 C protocol at 60 °C. View Full-Text
Keywords: solid state battery; thermoplastic polymer electrolyte; ionic liquid; sepiolite; inorganic filler solid state battery; thermoplastic polymer electrolyte; ionic liquid; sepiolite; inorganic filler
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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González, F.; Tiemblo, P.; García, N.; Garcia-Calvo, O.; Fedeli, E.; Kvasha, A.; Urdampilleta, I. High Performance Polymer/Ionic Liquid Thermoplastic Solid Electrolyte Prepared by Solvent Free Processing for Solid State Lithium Metal Batteries. Membranes 2018, 8, 55.

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