Solid State Ionics, volume 357, pages 115497
Transport mechanism of lithium ions in non-coordinating P(VdF-HFP) copolymer matrix
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Department of Materials Science & Engineering, University of Utah, 122 South Central Campus Drive, Salt Lake City, UT 84112, USA
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Publication type: Journal Article
Publication date: 2020-12-01
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
Polymer films based on poly(vinylidene difluoride- co -hexafluoropropylene) (P(VdF-HFP)) with different amounts of bis(trifluoromethane)sulfonimide lithium salt (LiTfSI) were prepared from acetone solution in a doctor blade casting machine under controlled and reproducible drying conditions. The modification of the copolymer-based layers show a significant enhancement of conductivity over several orders of magnitude for increasing LiTfSI content and a constantly low electronic conductivity. The addition of salt results in a structural change of the crystalline areas in the semi-crystalline copolymer matrix from α - to γ -phase of P(VdF), which has been studied using Raman spectroscopy and X-Ray diffraction. Lithium ions are coordinated by oxygen atoms of TfSI − as verified by Raman spectroscopy and molecular dynamics simulations. Based on the experimental data and simulation results, we propose a transport mechanism for the lithium ions through salt channels in the amorphous regions of the non-coordinating copolymer matrix via hopping between stabilized positions. • Transport mechanism of lithium ions in non-coordinating polymer. • Combination of experiments and simulations. • Easy and up-scalable manufacturing process of thin films from solution. • Polymer-based electrolyte material to replace liquids in lithium ion batteries.
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Mathies L. et al. Transport mechanism of lithium ions in non-coordinating P(VdF-HFP) copolymer matrix // Solid State Ionics. 2020. Vol. 357. p. 115497.
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Mathies L., Diddens D., Dong D., Bedrov D., Leipner H. Transport mechanism of lithium ions in non-coordinating P(VdF-HFP) copolymer matrix // Solid State Ionics. 2020. Vol. 357. p. 115497.
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TY - JOUR
DO - 10.1016/j.ssi.2020.115497
UR - https://doi.org/10.1016/j.ssi.2020.115497
TI - Transport mechanism of lithium ions in non-coordinating P(VdF-HFP) copolymer matrix
T2 - Solid State Ionics
AU - Mathies, Lena
AU - Diddens, Diddo
AU - Dong, Dengpan
AU - Bedrov, Dmitry
AU - Leipner, Hartmut
PY - 2020
DA - 2020/12/01 00:00:00
PB - Elsevier
SP - 115497
VL - 357
SN - 0167-2738
ER -
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@article{2020_Mathies,
author = {Lena Mathies and Diddo Diddens and Dengpan Dong and Dmitry Bedrov and Hartmut Leipner},
title = {Transport mechanism of lithium ions in non-coordinating P(VdF-HFP) copolymer matrix},
journal = {Solid State Ionics},
year = {2020},
volume = {357},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016/j.ssi.2020.115497},
pages = {115497},
doi = {10.1016/j.ssi.2020.115497}
}