Performance of a 60 F carbon nanotubes-based supercapacitor for hybrid power sources

Xiaofeng Wang, Dianbo Ruan, Zheng You, Yiqiang Lu, and Qiqian Sha Department of Precision Instruments and Mechanics, Tsinghua University, Beijing 100084, China Department of chemistry, University of science and technology Beijing, Beijing 100084, China

摘 要：<正>A supercapacitor based on charge storage at the interface between a high surface area carbon nanotube electrode and a Li-ClO4/PC electrolyte was assembled. The performance of the capacitor depends on not only the material used in the cell but also the construction of the cell. From a constant charge-discharge test, the capacitance of 60 F was obtained. The performance of the power capacitor for pulse power sources was described. The specific energy （0.8 W·h·kg-1） and the specific power （0.75 kW·kg-1） of the power supercapacitor were demonstrated with a cell of the maximum operating voltage of 2.5 V. A hybrid power source consisting of a lithium ionic battery and the 60 F supercapacitor was demonstrated to power successfully a simulated power load encountered in GSM portable communication equipment. The addition of the supercapacitor to the power train of a cellular phone results in significantly more energy from the battery being used by the load. The experiments indicate that more than 33.8% energy i

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