ZHANG Lifeng, DU Suqing, LIU Yi, et al. Applications of cyanate ionic liquids in graphene-based supercapacitors[J]. CIESC Journal, 2016, (12): 5276-5282.
ZHANG Lifeng, DU Suqing, LIU Yi, et al. Applications of cyanate ionic liquids in graphene-based supercapacitors[J]. CIESC Journal, 2016, (12): 5276-5282.DOI: 10.11949/j.issn.0438-1157.20160870.
Supercapacitors were constructed with graphene as electrodes and ionic liquid N-methyl-N-propylpyrrolidinium cyanate([C3mpyr] [OCN])/propylene carbonate(PC) as the mixed electrolytes. The electrochemical properties of constructed supercapacitors were tested at 50
60 and 70℃ by cyclic voltammetry(CV)
electrochemical impedance spectroscopy(EIS) and galvanostatic charge/discharge(GCD). The results indicated that the constructed supercapacitors exhibited good electrochemical properties at high operating temperatures. The supercapacitors gave the specific capacity of 295 F·g-1 and delivered an energy density as high as 118 W·h·kg-1 at 70℃ with the current density of 0.5 A·g-1. Additionally
the constructed supercapacitors showed a good cycling stability.