Nanocomposite polymer electrolytes based on poly(oxyethylene) and cellulose whiskers

My Ahmed Saïd Azizi Samir,Alain Dufresne,Jean-Yves Sanchez,Fannie Alloin

doi:10.1590/s0104-14282005000200009

My Ahmed Saïd Azizi Samir, Alain Dufresne + Show 2 more

Open Access

https://doi.org/10.1590/s0104-14282005000200009

Copy DOI

Abstract

Solid lithium-conducting nanocomposite polymer electrolytes based on poly(oxyethylene) (POE) were prepared from high aspect ratio cellulosic whiskers and lithium imide salt, LiTFSI. The cellulosic whiskers were extracted from tunicate -a sea animal- and consisted of slender parallelepiped rods that have an average length around 1 µm and a width close to 15 nm. High performance nanocomposite electrolytes were obtained. The filler provided a high reinforcing effect while a high level of ionic conductivity was retained with respect to unfilled polymer electrolytes. Cross-linking and plasticizing of the matrix as well as preparation of the composites from an organic medium were also investigated.

Highlights

Solid lithium-conducting nanocomposite polymer electrolytes based on poly(oxyethylene) (POE) were prepared from high aspect ratio cellulosic whiskers and lithium imide salt, lithium trifluoromethanesulfonylimide (LiTFSI)
Differential scanning calorimetry (DSC) measurements performed on salt-free nanocomposites show that the glassrubber transition temperature (Tg) of POE was not influenced by the cellulosic filler, contrarily to the melting temperature (Tm) and degree of crystallinity which were found to both decrease for highly filled (10 wt% and above) materials
This restricted crystallinity was confirmed by dynamic cooling crystallization experiments[14]. Both the crystallization and the onset temperatures were found to decrease as the cellulose whiskers content increases

Summary

Introduction

Solid lithium-conducting nanocomposite polymer electrolytes based on poly(oxyethylene) (POE) were prepared from high aspect ratio cellulosic whiskers and lithium imide salt, LiTFSI. In 1979, Armand et al.[1] have foreseen the potential suitable mechanical properties require a high applications of solid polymer electrolytes as ionic cross-linking density that results in a strong reduction of conducting materials in electrochemical devices. A. et al - Nanocomposite polymer electrolytes based on poly(oxyethylene) and cellulose whiskers ionic conductivity[5,6,7].

Results

Conclusion