Electric double-layer capacitors with corn starch-based biopolymer electrolytes incorporating silica as filler

被引：79

作者：

Teoh, K. H. ^{[1
]}

Lim, Chin-Shen ^{[1
]}

Liew, Chiam-Wen ^{[1
]}

Ramesh, S. ^{[1
,2
]}

机构：

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

[2] Univ Malaya, Ctr Adv Mfg & Mat Proc, Dept Mech Engn, Kuala Lumpur 50603, Malaysia

来源：

IONICS | 2015年 / 21卷 / 07期

关键词：

Polymers; Electrical properties; Transport properties; SOLID POLYMER ELECTROLYTES; ELECTROCHEMICAL CAPACITORS; LITHIUM BATTERIES; SUPERCAPACITOR; MEMBRANE;

D O I：

10.1007/s11581-014-1359-x

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：

Solid-state electric double-layer capacitors (EDLCs) based on corn starch biodegradable polymer electrolytes are fabricated. Silica is added into the corn starch polymer electrolytes to improve the ionic conductivity and capacitance of the EDLCs. The ionic conductivity as a function of temperature obeys the Arrhenius equation indicating ionic hopping mechanism in the polymer electrolytes. Linear sweep voltammetry shows that the prepared corn starch-based biopolymer electrolyte is stable in the range from -2.5 to 2.5 V. Electrical capacitance performances of these capacitors are studied by cyclic voltammetry, galvanostatic charge-discharge, and AC impedance spectroscopy. The discharge characteristics have been found to be almost linear, which confirms the capacitive behavior of the EDLC cell. The fabricated EDLC cells perform good cyclability up to 500 cycles with more than 90 % of coulombic efficiency.

引用

页码：2061 / 2068

页数：8

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