Electrical, structural, thermal and electrochemical properties of corn starch-based biopolymer electrolytes

被引：116

作者：

Liew, Chiam-Wen ^{[1
]}

Ramesh, S. ^{[1
]}

机构：

[1] Univ Malaya, Fac Sci, Ctr Ion, Dept Phys, Kuala Lumpur 50603, Malaysia

来源：

CARBOHYDRATE POLYMERS | 2015年 / 124卷

关键词：

Corn starch; Ionic liquid; EDLC; Capacitance; SOLID POLYMER ELECTROLYTES; DOUBLE-LAYER CAPACITOR; IONIC-LIQUID; SUPERCAPACITORS; HEXAFLUOROPHOSPHATE; CONDUCTIVITY; PERFORMANCE; ELECTRODES; TRANSPORT; GLYCEROL;

D O I：

10.1016/j.carbpol.2015.02.024

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Biopolymer electrolytes containing corn starch, lithium hexafluorophosphate (LiPF6) and ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate (BmImPF(6)) are prepared by solution casting technique. Temperature dependence-ionic conductivity studies reveal Vogel-Tamman-Fulcher (VTF) relationship which is associated with free volume theory. Ionic liquid-based biopolymer electrolytes show lower glass transition temperature (T-g) than ionic liquid-free biopolymer electrolyte. X-ray diffraction (XRD) studies demonstrate higher amorphous region of ionic liquid-added biopolymer electrolytes. In addition, the potential stability window of the biopolymer electrolyte becomes wider and stable up to 2.9 V. Conclusively, the fabricated electric double layer capacitor (EDLC) shows improved electrochemical performance upon addition of ionic liquid into the biopolymer electrolyte. The specific capacitance of EDLC based anionic liquid-added polymer electrolyte is relatively higher than that of ionic liquid-free polymer electrolyte as depicted in cyclic voltammogram. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：222 / 228

页数：7

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