科研之友
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摘要
An asymmetric supercapacitor was fabricated using VS2 nanosheets as the positive electrode and activated carbon (AC) as the negative electrode, with a 6 M KOH solution as electrolyte. These materials were combined to maximize the specific capacitance and enlarge the potential window, therefore improving the energy density of the device. A specific capacitance of 155 F g(-1) at 1 A g(-1) with a maximum energy density as high as 42 W h kg(-1) and a power density of 700 W kg(-1) was obtained for the asymmetric supercapacitor within the voltage range of 0-1.4 V. The supercapacitor also exhibited good stability, with similar to 99% capacitance retention and no capacitance loss after 5000 cycles at a current density of 2 A g(-1).
- 出版日期2016
