Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

Louise M. McGrath; John Jones; Edwin Carey; James F. Rohan

doi:10.1002/open.201900313

Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

Louise M. McGrath
, John Jones
, Edwin Carey
, James F. Rohan

Research output: Contribution to journal › Article › peer-review

Abstract

Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C₄mpyrTFSI), LiTFSI and poly(vinylidene difluoride-co-hexafluoropropylene (PVDF-HFP). FT-IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C₄mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10⁻³ S cm⁻² at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C₄mpyrTFSI polymer gel.

Original language	English
Pages (from-to)	1429-1436
Number of pages	8
Journal	ChemistryOpen
Volume	8
Issue number	12
DOIs	https://doi.org/10.1002/open.201900313
Publication status	Published - 1 Dec 2019

Keywords

flexible polymers
gel electrolyte membranes
germanium anodes
ionic liquids
lithium-ion batteries

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/open.201900313

https://hdl.handle.net/10468/10965Licence: CC BY-NC-ND

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@article{8f244aba1f3f4eb5930f2b440edbf45c,

title = "Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries",

abstract = "Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C4mpyrTFSI), LiTFSI and poly(vinylidene difluoride-co-hexafluoropropylene (PVDF-HFP). FT-IR and Raman spectroscopy show that an amorphous film is obtained for high (60 \%) C4mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10−3 S cm−2 at room temperature is achieved for the 60 \% ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 \% after 90 cycles in potential cycling tests with the 60 \% C4mpyrTFSI polymer gel.",

keywords = "flexible polymers, gel electrolyte membranes, germanium anodes, ionic liquids, lithium-ion batteries",

author = "McGrath, \{Louise M.\} and John Jones and Edwin Carey and Rohan, \{James F.\}",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors. Published by Wiley-VCH Verlag GmbH \& Co. KGaA.",

year = "2019",

month = dec,

day = "1",

doi = "10.1002/open.201900313",

language = "English",

volume = "8",

pages = "1429--1436",

journal = "ChemistryOpen",

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TY - JOUR

T1 - Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

AU - McGrath, Louise M.

AU - Jones, John

AU - Carey, Edwin

AU - Rohan, James F.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C4mpyrTFSI), LiTFSI and poly(vinylidene difluoride-co-hexafluoropropylene (PVDF-HFP). FT-IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C4mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10−3 S cm−2 at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C4mpyrTFSI polymer gel.

AB - Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C4mpyrTFSI), LiTFSI and poly(vinylidene difluoride-co-hexafluoropropylene (PVDF-HFP). FT-IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C4mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10−3 S cm−2 at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C4mpyrTFSI polymer gel.

KW - flexible polymers

KW - gel electrolyte membranes

KW - germanium anodes

KW - ionic liquids

KW - lithium-ion batteries

UR - https://www.scopus.com/pages/publications/85077394630

U2 - 10.1002/open.201900313

DO - 10.1002/open.201900313

M3 - Article

AN - SCOPUS:85077394630

SN - 2191-1363

VL - 8

SP - 1429

EP - 1436

JO - ChemistryOpen

JF - ChemistryOpen

IS - 12

ER -

Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

Abstract

Keywords

UN SDGs

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