Safe, high-energy supercapacitors based on solvent-free ionic liquid electrolytes

被引:246
作者
Arbizzani, Catia [1 ]
Biso, Maurizio [1 ]
Cericola, Dario [1 ]
Lazzari, Mariachiara [1 ]
Soavi, Francesca [1 ]
Mastragostino, Marina [1 ]
机构
[1] Univ Bologna, Dipartimento Sci Met Elettrochim & Tecn Chim, I-40127 Bologna, Italy
关键词
Ionic liquid; Double-layer supercapacitor; Hybrid supercapacitor; Activated carbon; Poly(3-methylthiophene); Power-assisted HEV;
D O I
10.1016/j.jpowsour.2008.09.016
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 [物理化学]; 081704 [应用化学];
摘要
Safety is the main concern for energy storage-system application in hybrid-electrical vehicles (HEVs) and ionic liquids (Ls) of low vapor pressure and high thermal stability represent a strategy to meet this key requisite. The use of solvent-free ILs in supercapacitors enables the high cell voltages required for increasing supercapacitor energy LIP to the values for power-assist application in HEVs. In order to exploit the wide electrochemical stability window of ILs, tailored electrode materials and cell configurations have to be used. The performance of asymmetric double-layer carbon supercapacitors (AEDLCs) and carbon/poly(3-methylthiophene) hybrid supercapacitors operating with different pyrrolidinium-based ILs are reported and compared. This study demonstrates that a design-optimized AEDLC operating with safe, solvent-free IL electrolyte meets cycling stability and the energy and power requisites for power-assisted HEVs at the investigated temperatures. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:1575 / 1579
页数:5
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