Dielectric properties of sulfonated poly(ether ether ketone) (SPEEK) electrolytes with 1-ethyl-3-methylimidazolium tetrafluoroborate salt: Ionic liquid-based conduction pathways

被引：27

作者：

Yilmazoglu, Mesut ^{[1
]}

Bayiroglu, Fatih ^{[2
]}

Erdemi, Hamit ^{[3
]}

Abaci, Ufuk ^{[4
]}

Guney, H. Yuksel ^{[5
]}

机构：

[1] Yalova Univ, Fac Engn, Dept Chem Engn, TR-77100 Yalova, Turkey

[2] Yalova Univ, Inst Sci, Dept Chem Engn MSc, TR-77200 Yalova, Turkey

[3] Yalova Univ, Fac Engn, Dept Polymer Engn, TR-77100 Yalova, Turkey

[4] Kocaeli Univ, Ford Otosan Ihsaniye Automot Vocat Sch, TR-41680 Kocaeli, Turkey

[5] Kocaeli Univ, Fac Arts & Sci, Dept Phys, TR-41380 Kocaeli, Turkey

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2021年 / 611卷

关键词：

Dielectric properties; Solid polymer electrolyte; Sulfonated poly (ether ketone); Ionic liquid; Ionic conductivity; SOLID POLYMER ELECTROLYTES; COMPOSITE MEMBRANES; ELECTROCHEMICAL PROPERTIES; PROTON CONDUCTIVITY; TEMPERATURE; PERFORMANCE; TRANSPORT; ACID; FABRICATION; RELAXATION;

D O I：

10.1016/j.colsurfa.2020.125825

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, dielectric properties of sulfonated poly(ether ether ketone) (SPEEK) solid polymer electrolytes (SPEs) containing room-temperature molten salt, 1-ethyl-3-methylimidazolium tetrafluoroborate were investigated. Additionally, the effects of ionic liquid (IL) addition on the thermomechanical properties and the microstructure of composite electrolytes (SPEEK-30 x 1IM and SPEEK-30 x 2IM) were studied. The characteristics of the SPEs were investigated by FTIR, SEM, TGA, DSC and DMA measurements. FTIR analysis confirmed the success of the sulfonation process and IL/sulfonated polymer interactions. IL addition caused changes in the crystalline structure and surface morphology of the SPEs. It was observed that SPEEK-30 x 1IM and SPEEK-30 x 2IM electrolytes have lower glass transition temperatures (T-g) and crystallinity than that of pure SPEEK-30. Due to the amorphous character formed by IL, proton conduction paths in which ILs exhibit enhanced conductivity have been formed. Among the composite electrolytes, SPEEK-30 x 2IM demonstrated an ionic conductivity (5.45 x 10(-4) Scm(-1)) more than 20 times higher than SPEEK-30.

引用

页数：10

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