Graphene-Based Supercapacitors Using Eutectic Ionic Liquid Mixture Electrolyte

被引:58
|
作者
Lin, Zifeng [1 ,2 ]
Taberna, Pierre-Louis [1 ,2 ]
Simon, Patrice [1 ,2 ]
机构
[1] Univ Toulouse 3, CIRIMAT UMR CNRS 5085, 118 Route Narbonne, F-31062 Toulouse, France
[2] FR CNRS 3459, Reseau Stockage Electrochim Energie RS2E, Paris, France
基金
欧洲研究理事会;
关键词
supercapacitors; graphene film; ionic liquid eutectic; working temperature window; HIGH-PERFORMANCE; NEXT-GENERATION; ENERGY-STORAGE; RESTACKING;
D O I
10.1016/j.electacta.2015.12.097
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Compact graphene films were prepared and electrochemically tested at various temperatures in a eutectic of ionic liquid mixture (1: 1 by weight or mole N-methyl-N-propylpiperidinium bis (fluorosulfonyl) imide and N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl) imide) electrolyte. A large temperature window from -30 degrees C to 80 degrees C was achieved together with a large potential window of 3.5 V at room temperature and below. A maximum gravimetric capacitance of 175 F.g(-1) (85 mAh.g(-1)) was obtained at 80 degrees C. 130 F.g(-1) (63 mAh.g(-1)) and 100 F.g(-1) (49 mAh.g(-1)) were still delivered at -20 degrees C and -30 degrees C respectively. Besides, a volumetric capacitance of 50 F.cm(-3) was achieved with a thick graphene film (60 mm). The outstanding performance of such compact graphene film in the eutectic ionic liquid mixture electrolyte makes it a promising alternative to activated carbon for supercapacitor applications, especially under extreme temperature conditions. (c) 2016 Published by Elsevier Ltd.
引用
收藏
页码:446 / 451
页数:6
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