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Citation: XU Bin, WU Feng, CHEN Ren-jie, CHEN Shi, WANG Guo-qing. Capacitance Characteristics of Carbon Nanotubes in Room Temperature Molten Salt Electrolyte[J]. Acta Physico-Chimica Sinica, ;2005, 21(10): 1164-1168. doi: 10.3866/PKU.WHXB20051021 shu

Capacitance Characteristics of Carbon Nanotubes in Room Temperature Molten Salt Electrolyte

1.
School of Chemical Engineering & Environment, Beijing Institute of Technology, Beijing 100081； Institute of Chemical Defense, Beijing 100083

Received Date: 4 February 2005
Available Online: 15 October 2005

Capacitance characteristics of carbon nanotubes (CNTs) in room temperature molten salt (RTMS) electrolyte of LiTFSI-acetamide were investigated. Cyclic voltammetry (CV) and galvanostatic charge/discharge measurements were employed to investigate the electrochemical performance of the test cells composed of a pair of carbon nanotubes electrodes and RTMS as electrolyte. The CNTs exhibited typical capacitance behavior in LiTFSI-acetamide, and a high specific capacitance of 22 F•g-1 estimated from galvanostatic discharge was obtained. The working voltage of the test cells could reach at 2.0 V, and they also showed a practical od level of durability over cycles of charge and discharge. After 1000 charge and discharge cycles, the capacity loss was just 10% of the initial discharge capacity. The preliminary results suggest that RTMS is a kind of promising electrolyte for supercapacitors.
- Carbon nanotubes;Room temperature molten salt;Capacitance
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