Open Access

Downloads

Download data is not yet available.

Abstract

This paper presented the preparattion of a gel polymer electrolyte (GPE) based on poly(ethylene oxide) (PEO) as the host polymer, by blending with the additives polyvinylidene fluoride, PVDF, and a combination of nano silica (SiO2) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. The GPE membranes were prepared by dissolving the compounds in N,N-dimethylformamide (DMF) solvent and drying at 60 oC. The results showed that the addition of PVDF improved the thermal stability and enhanced the mechanical properties of the GPE membrane structure. Futhermore, the incorporation of SiO2 promoted the dissociation of the Li+ ion from the LiTFSI salt. The electrochemical properties of the GPE membranes were investigated within the range of PVDF mass concentrations at 0%, 5%, 10%, 15% and 20%, with a fixed 5 wt% SiO2 and 15 wt% LiTFSI relative to the total PEO mass. The Linear Sweep Voltammetry (LSV) measure showed that the sample with the composition of PEO – 5 wt% PVDF – 5 wt% SiO2 – 15 wt% LiTFSI being the best oxidation onset potential (3.9 V vs. Li+/Li). The Electrochemical Impedance Spectroscopy (EIS) results showed that the Li+ ion conductivity of this GPE membranes reached 2.32 × 10-4 S/cm at 60 oC, and the discharge capacity was 104 mAh/g at C/10 rate. The obtained results showed that the GPEs would be for applications in Li−ion batteries.



Author's Affiliation
  • Trang Thi Thuy Nguyen

    Google Scholar Pubmed

  • Vu Tan Phat

    Email I'd for correspondance: vtphat@hcmus.edu.vn
    Google Scholar Pubmed

  • Man Van Tran

    Google Scholar Pubmed

  • Phung My Loan Le

    Google Scholar Pubmed

Article Details

Issue: Vol 8 No Online First (2024): Online First
Page No.: In press
Published: Oct 4, 2024
Section: Original Research
DOI:

 Copyright Info

Creative Commons License

Copyright: The Authors. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 How to Cite
Nguyen, T., Phat, V., Tran, M., & Le, P. (2024). Survey of the Polyvinylidene Fluoride (PVDF) ratio and evaluation of electrochemical properties of Gel-Polymer PEO/PVDF/SiO2/LiTFSI membranes used for Li||LiFePO4 batteries. Science & Technology Development Journal: Natural Sciences, 8(Online First), In press. Retrieved from https://stdjns.scienceandtechnology.com.vn/index.php/stdjns/article/view/1393

 Cited by



Article level Metrics by Paperbuzz/Impactstory
Article level Metrics by Altmetrics

 Article Statistics
HTML = 122 times
Online First   = 38 times
Total   = 38 times