Magnesium ion-conducting gel polymer electrolytes dispersed with fumed silica for rechargeable magnesium battery application |
| |
Authors: | Pandey G P Agrawal R C Hashmi S A |
| |
Institution: | (1) Department of Physics and Astrophysics, University of Delhi, Delhi, 110 007, India;(2) School of Studies in Physics, Pandit Ravishankar Shukla University, Raipur, 492010, Chhattisgarh, India; |
| |
Abstract: | Effect of fumed silica dispersion on poly(vinylidene fluoride-co-hexafluoropropylene)-based magnesium ion-conducting gel polymer
electrolyte has been studied using various physical and electrochemical techniques. The composite gel electrolytes are free-standing
and flexible films with enough mechanical strength. The optimized composition with 3 wt.% filler offers a maximum ionic conductivity
of ∼1.1 × 10−2 S cm−1 at ∼25 °C with good thermal and electrochemical stabilities. The Mg2+ ion conduction in the gel nanocomposite film is confirmed from the cyclic voltammetry, impedance spectroscopy, and transport
number measurements. The space-charge layers formed between filler particles and gel electrolyte are responsible for the enhancement
in ionic conductivity. The applicability of the gel nanocomposite to a rechargeable battery is examined by fabricating a prototype
cell consisting of Mg or Mg-multiwalled carbon nanotube (MWCNT) composite] and MoO3 as negative and positive electrodes, respectively. The discharge capacity and the rechargeability of the cell have been improved
when Mg metal is substituted by Mg-MWCNT composite. The discharge capacity of the optimized cell has found to be ∼175 mAh g−1 of MoO3 for an initial ten charge–discharge cycles. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|