Sulfonated Poly(ether ether ketone) Doped with Ammonium Ionic Liquids and Nano-Silicon Dioxide for Polymer Electrolyte Membranes

Shuguo Qu; Minhui Li; Chenchen Zhang; Yuanyuan Sun; Jihai Duan; Weiwen Wang; Jianlong Li; Xiaojin Li

doi:10.3390/polym11010007

Polymers (Dec 2018)

Sulfonated Poly(ether ether ketone) Doped with Ammonium Ionic Liquids and Nano-Silicon Dioxide for Polymer Electrolyte Membranes

Shuguo Qu,
Minhui Li,
Chenchen Zhang,
Yuanyuan Sun,
Jihai Duan,
Weiwen Wang,
Jianlong Li,
Xiaojin Li

Affiliations

Shuguo Qu: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Minhui Li: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Chenchen Zhang: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Yuanyuan Sun: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Jihai Duan: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Weiwen Wang: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Jianlong Li: Key Laboratory Reactions and Isolations of Muti-phases Liquid of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China
Xiaojin Li: Energy Storage Management and Equipment Group, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China

DOI: https://doi.org/10.3390/polym11010007
Journal volume & issue: Vol. 11, no. 1
p. 7

Abstract

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Nano-silicon dioxide (SiO2) was incorporated into the matrix of sulfonated poly(ether ether ketone) (SPEEK)/ammonium ionic liquid (AIL) membranes by solution casting, with the aim of reducing ionic liquid leaching and any consequent decrease in proton conductivity. Fourier transform infrared (FTIR) spectra results indicate incorporation of the SPEEK matrix with AIL and nano-SiO2. Scanning electron microscopy (SEM) and X⁻ray diffraction (XRD) images revealed that incorporation of nano-SiO2 make the ternary composite membranes more flexible. The maximum ion exchange capacity (IEC) value was 3.25 meq/g, and the net structure formed by the nano-SiO2 not only retarded AIL leaching, but also increased the proton conductivity of the composite membranes. AIL leaching from the membranes was between 20% and 30%, which was lower than that of the SPEEK/AIL membrane. The maximum proton conductivity for the SPEEK/AIL/SiO2 membranes reached 10.73 mS/cm at 393 K.

Published in Polymers

ISSN: 2073-4360 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/polymers/

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