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Published in: Polymer Bulletin 3/2024

20-05-2023 | ORIGINAL PAPER

Solid polymer electrolyte membranes of trimethylsulfonium bis(trifluoromethylsulfonyl)imide/NaClO4/PEO for Na-ion batteries

Authors: Jesús Guzmán-Torres, Arturo G. Sánchez-Valdez, Lorena L. Garza-Tovar, Luis C. Torres-González, Edgar González-Juárez, Ignacio González-Martinez, Arián Espinosa-Roa, Eduardo M. Sánchez-Cervantes

Published in: Polymer Bulletin | Issue 3/2024

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Abstract

Ionic liquid trimethylsulfonium bis(trifluoromethylsulfonyl)imide (M3STFSI) was synthesized to obtain solid polymer electrolyte (SPE) membranes by mixing it with polyethylene oxide and sodium perchlorate (NaClO4). Nine membranes were prepared with varying concentrations of high, medium, and low polymer content. X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, Fourier transform infrared spectroscopy and Raman spectroscopy techniques were used to characterize both the products and the raw materials. Ionic conductivity was determined using electrochemical impedance spectroscopy (EIS), and redox phenomena were studied by cyclic voltammetry. To calculate the total ion transference number and Na+ ion transference number, chronoamperometry (CA) with EIS was employed. Additionally, the electrochemical stability in SPE (M1) was measured through linear sweep voltammetry (LSV). The NaFe(SO4)2 compound, known as Eldfellite, was utilized as a cathode in Na-ion battery tests. A Na||M1||NaFe(SO4)2 cell was prepared to determine the battery performance via galvanostatic charge/discharge profiles. Thus, the theoretical specific capacity of Eldfellite for Na+ insertion is 99 mAh g−1, and after 70 cycles at a C/10 rate vs. Na0 metallic as an anode, the specific discharge capacity was 75 mAh g−1, with a coulombic efficiency above 99%.

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Appendix
Available only for authorised users
Literature
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35.
Metadata
Title
Solid polymer electrolyte membranes of trimethylsulfonium bis(trifluoromethylsulfonyl)imide/NaClO4/PEO for Na-ion batteries
Authors
Jesús Guzmán-Torres
Arturo G. Sánchez-Valdez
Lorena L. Garza-Tovar
Luis C. Torres-González
Edgar González-Juárez
Ignacio González-Martinez
Arián Espinosa-Roa
Eduardo M. Sánchez-Cervantes
Publication date
20-05-2023
Publisher
Springer Berlin Heidelberg
Published in
Polymer Bulletin / Issue 3/2024
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-023-04844-z

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