A Flexible and High-Voltage Internal Tandem Supercapacitor Based on Graphene-Based Porous Materials with Ultrahigh Energy Density

被引：58
|
作者：
Zhang, Fan [1 ,2 ]
Lu, Yanhong [1 ,2 ]
Yang, Xi [1 ,2 ]
Zhang, Long [1 ,2 ]
Zhang, Tengfei [1 ,2 ]
Leng, Kai [1 ,2 ]
Wu, Yingpeng [1 ,2 ]
Huang, Yi [1 ,2 ]
Ma, Yanfeng [1 ,2 ]
Chen, Yongsheng [1 ,2 ]
机构：
[1] Nankai Univ, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China
[2] Nankai Univ, Ctr Nanoscale Sci & Technol, Inst Polymer Chem, Coll Chem, Tianjin 300071, Peoples R China
来源：
SMALL | 2014年 / 10卷 / 11期
关键词：
FUEL-CELL STACKS; ELECTRODE MATERIALS; AQUEOUS SUPERCAPACITORS; CARBON MATERIALS; SURFACE-AREA; IONIC LIQUID; OXIDE SHEETS; PORE-SIZE; PERFORMANCE; FABRICATION;
D O I：
10.1002/smll.201303240
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Pursuing higher working voltage and packaged energy density, an internal tandem supercapacitor has been successfully designed and fabricated based on graphene-based porous carbon hybrid material. Compared with the packaged energy density of 27.2 Wh kg(cell)(-1) and working voltage of 3.5 V using EMIMBF4 electrolyte for the conventional single-cell supercapacitor, the internal tandem device with the same material achieves a much higher working voltage of 7 V as well as a significantly improved energy density of 36.3 Wh kg(cell)(-1) (increased by 33%), which is also about 7 times of that of the state-of-art commercial supercapacitors. A flexible internal tandem device is also designed and fabricated and demonstrated similar excellent performance.
引用
收藏
页码：2285 / 2292
页数：8
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