Preparation and Electrochemical Characterization of Li-Ion Supercapacitor

Abstract:

A new type of Li-ion supercapacitor was fabracatied with activated carbon as cathode and graphite pre-intercalated Li ion as anode. The electrochemical characterization was also conducted with cyclic voltammetry and AC impedance methods. By this unique cell design , the capacitance of Li-ion supercapacitor keep the same level to double elecric layer supercapacitor ,But the voltage window of supercapacitor can be enhanced from 2.5V to 4.2V.So the energy density of Li-ion supercapacitor can be enhanced 4 times of common carbon-based supacapacitor. There is above 99% capacitance retention for Li ion supercapacitor after 200 cycles at 200mA discharge current. A pure capacitance behavior can be found at the frequency below the knee in its AC impedance spectroscopy.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 448-451
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.448
• Online since: February 2012
• Authors: Jing Li, Ming Xu, Xing Li, Chun Yuan
• Keywords: Cycle Performance, Li–Ion, Specific Capacitance, Super-Capacitor (SC), Voltage Window

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