4.6 Article

Development of proton conductive polymer electrolytes composed of sulfonated poly(ether ether ketone) and Bronsted acidic ionic liquid (1-methylimidazolium tetrafluoroborate)

Journal

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 32, Issue 11, Pages 15393-15411

Publisher

SPRINGER
DOI: 10.1007/s10854-021-06089-w

Keywords

-

Funding

  1. Yalova University

Ask authors/readers for more resources

This study synthesized and characterized solid polymer electrolytes derived from sulfonated poly(ether ether ketone) and a Bronsted acidic ionic liquid. By incorporating different amounts of ionic liquid with sulfonated polymer matrices, the efficiency of the interaction was examined. The results showed that sPEEK(1.0)-2 sample exhibited maximum proton conductivity and thermomechanical stability under anhydrous environment, opening up new prospects for electrochemical applications.
This article relates to the synthesis, characterization and dielectric measurements of solid polymer electrolytes, derived from the ionic interaction of sulfonated poly(ether ether ketone) (sPEEK) and a Bronsted acidic ionic liquid (1-methylimidazolium tetrafluoroborate, [Hmim][BF4]) for electrochemical applications. The efficiency of the interaction was examined by incorporating different amounts of ionic liquid (IL) with the sulfonated polymer matrices having three different degrees of sulfonation (DS). The polymer matrices and composite electrolytes were systematically characterized with H-1 NMR, FT-IR, SEM, TGA and DMA. Anhydrous proton conductivity and dielectric measurements were studied in detail with varying temperature and frequencies. The presented analyzes revealed that sPEEK(1.0)-2 sample (2.50-3.51 x 10(-1) Sm-1 at 380-450 K) exhibited maximum proton conductivity and thermomechanical stability under anhydrous environment. Dielectric measurements also provided results confirming proton conductivity measurements. Furthermore, sPEEK(1.0)-2 composite membrane exhibited higher glass transition temperature and reasonable storage modulus value (T-g = 157 degrees C; E ' = 0.22 GPa) compared to IL-doped sPEEK membranes presented in the literature. The work herein opens new prospects for the as-synthesized materials to use as a solid polymer electrolyte for electrochemical applications such as high temperature proton exchange membrane fuel cells (HT-PEMFC) in a wide temperature range.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available