Record Details

<strong>Dielectric behaviour, ionic conductivity and structure of high energy ball mill blended melt pressed and solution cast solid polymeric nanocomposite electrolytes</strong>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <strong>Dielectric behaviour, ionic conductivity and structure of high energy ball mill blended melt pressed and solution cast solid polymeric nanocomposite electrolytes</strong>
 
Added Entry - Uncontrolled Name Sengwa, R J; Dept of physics JNV University Jodhpur-342005
 
Uncontrolled Index Term Polymer nanocomposite electrolyte; Dielectric property;  Ionic conductivity;  XRD; High energy ball milling
 
Summary, etc. The<strong> </strong>high energy ball mill blended solid polymeric nanocomposite electrolytes (SPNEs) comprising poly(ethylene oxide) (PEO), lithium perchlorate (LiClO<sub>4</sub>) and montmorillonite (MMT) clay as nanofiller (PEO<sub>20</sub>-LiClO<sub>4</sub>–<em>x</em> wt% MMT; where EO:Li<sup>+</sup> = 20:1, and <em>x </em>= 0, 1, 2, 3 and 5) were prepared by melt pressing and solution casting techniques. The complex dielectric function, <em>ac</em> ionic conductivity, electric modulus and impedance spectra of these SPNE films have been investigated by dielectric relaxation spectroscopy in the frequency range 20 Hz – 1 MHz at ambient temperature. The values of dielectric relaxation strength, relaxation time of Li<sup>+</sup> cation coordinated PEO segmental motion and <em>dc</em> ionic conductivity have been determined and their correlations with ion transportation in these materials have been explored. Results reveal that the <em>dc </em>ionic conductivity of solution cast SPNE films has gradual increase with loading of MMT concentration up to 5 wt%. In case of melt pressed SPNE films, the <em>dc</em> ionic conductivity shows anomalous variation with MMT concentration and it is maximum at 1 wt% MMT. The X-ray diffraction study of these SPNE films confirms the formation of ion-dipolar complexes between the ether oxygen atoms of PEO chain, the lithium cations and the siloxane groups of MMT nano-platelets. The <em>d</em><sub>001</sub>-spacing of intercalated MMT, crystallite size of PEO and the relative changes in PEO peaks intensity with MMT concentration have been evaluated from the XRD patterns. These XRD parameters were discussed in relation to the MMT intercalated structures and amorphicity of the electrolyte materials. The correlation between ionic conductivity and the structural properties of these electrolytes has also been explored.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2016-06-10 13:22:16
 
Electronic Location and Access binary/octet-stream
http://op.niscair.res.in/index.php/IJPAP/article/view/2047
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 51, ##issue.no## 11 (2013): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India © 2015. The Council of Scientific &amp; Industrial Research, New Delhi.