Ionic conductivity, SEM, TGA and rheological studies of Nano-dispersed silica based polymer gel electrolytes containing LiBF4

Ionic conductivity, SEM, TGA and rheological studies of Nano-dispersed silica based polymer gel... Polymethylmethacrylate (PMMA) based nano-dispersed polymer gel electrolytes containing lithium tetrafluoroborate (LiBF4), non-volatile solvents: propylene carbonate (PC) as single solvent, binary solvent mixtures with N,N-dimethylformamide (PC:DMF) in different volume ratios and nano-sized silica have been prepared and characterized. Ionic conductivity of gel as well as liquid electrolytes depends mainly upon the donor number and viscosity of the solvents used. Maximum ionic conductivity of 9.4 × 10−3 S/cm at 25 °C has been obtained for nano-dispersed silica based polymer gel electrolyte having (PC:DMF = 1:1) volume ratio. Small content of PMMA in gel electrolyte improves the ionic conductivity, whereas small content of nano-sized silica not only enhances the ionic conductivity, but also improves the mechanical strength of the electrolyte. Two conductivity maxima observed at very low content of nano-sized silica in PMMA based gel electrolytes for binary solvent mixture having 2:1 and 1:1 volume ratios have been explained by double percolation threshold model. Moreover nano-dispersed silica based polymer gel electrolytes show good thermal properties, which have been confirmed by Differential Scanning Calorimetry (DSC) & Thermo Gravimetric Analysis (TGA) and mechanical properties have been studied by Dynamic Mechanical Analysis (DMA) studies. Also, the ionic conductivity of nano-dispersed silica based polymer gel electrolytes show typical curvature behavior as compared to polymer gel electrolyte over the temperature range of 10 °C–70 °C indicating their high amorphous nature. Also, the comparative results have been observed via activation energies for polymer gel electrolytes with and without silica, which have been calculated from logσ vs. 1000/T plot. The behavior of the plot does not show much change at all temperature regions (change is only by a factor), which compile acute in distinct electrochemical devices. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Ionic conductivity, SEM, TGA and rheological studies of Nano-dispersed silica based polymer gel electrolytes containing LiBF4

Loading next page...
 
/lp/elsevier/ionic-conductivity-sem-tga-and-rheological-studies-of-nano-dispersed-HHGpzQ5miA
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2018.01.023
Publisher site
See Article on Publisher Site

Abstract

Polymethylmethacrylate (PMMA) based nano-dispersed polymer gel electrolytes containing lithium tetrafluoroborate (LiBF4), non-volatile solvents: propylene carbonate (PC) as single solvent, binary solvent mixtures with N,N-dimethylformamide (PC:DMF) in different volume ratios and nano-sized silica have been prepared and characterized. Ionic conductivity of gel as well as liquid electrolytes depends mainly upon the donor number and viscosity of the solvents used. Maximum ionic conductivity of 9.4 × 10−3 S/cm at 25 °C has been obtained for nano-dispersed silica based polymer gel electrolyte having (PC:DMF = 1:1) volume ratio. Small content of PMMA in gel electrolyte improves the ionic conductivity, whereas small content of nano-sized silica not only enhances the ionic conductivity, but also improves the mechanical strength of the electrolyte. Two conductivity maxima observed at very low content of nano-sized silica in PMMA based gel electrolytes for binary solvent mixture having 2:1 and 1:1 volume ratios have been explained by double percolation threshold model. Moreover nano-dispersed silica based polymer gel electrolytes show good thermal properties, which have been confirmed by Differential Scanning Calorimetry (DSC) & Thermo Gravimetric Analysis (TGA) and mechanical properties have been studied by Dynamic Mechanical Analysis (DMA) studies. Also, the ionic conductivity of nano-dispersed silica based polymer gel electrolytes show typical curvature behavior as compared to polymer gel electrolyte over the temperature range of 10 °C–70 °C indicating their high amorphous nature. Also, the comparative results have been observed via activation energies for polymer gel electrolytes with and without silica, which have been calculated from logσ vs. 1000/T plot. The behavior of the plot does not show much change at all temperature regions (change is only by a factor), which compile acute in distinct electrochemical devices.

Journal

Solid State IonicsElsevier

Published: Apr 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off