Capacitive properties of low potential electro-polymerized polyfluorene and activated carbon composi

• 出 处: Science China(Chemistry)
• 发表日期: 2012年03期
• 关键词: electrolyte capacitor capacitance reversible acetonitrile boron AgCl lithium vol

Polyfluorene (PF) film has been successfully electropolymerized at lower potential (0.91 V vs.Ag/AgCl) in the mixed electrolyte of boron trifluoride diethyl etherate and trifluoroacetic acid.The PF film is characterized to have about 10 repeat units and no presence of ketonic defect site.UV-vis and photoluminescent spectral studies indicate that the PF film is blue light emitting.From cyclic voltammetry and galvanostatic charge-discharge tests in 1 M lithium perchlorate/acetonitrile electrolyte,the polyfluorene/activated carbon electrode shows a specific capacitance of 227.1 F g-1 (per active layer mass) and reversible redox reaction at the potential of 1.4 V in a three electrode configuration.An asymmetric electrochemical capacitor based on this composite electrode and activated carbon electrode exhibits a specific energy of 14.7 Wh kg-1 (per active layer mass).These results indicate that electrochemically prepared polyfluorene could be used as energy storage component for electrochemical application.

Polyfluorene (PF) film has been successfully electropolymerized at lower potential (0.91 V vs. Ag / AgCl) in the mixed electrolyte of boron trifluoride diethyl etherate and trifluoroacetic acid. The PF film is characterized to have about 10 repeat units and no presence of ketonic defect site. UV-vis and photoluminescent spectral studies indicate that the PF film is blue light emitting. From cyclic voltammetry and galvanostatic charge-discharge tests in 1 M lithium perchlorate / acetonitrile electrolyte, the polyfluorene / activated carbon electrode shows a specific capacitance of 227.1 An asymmetric electrochemical capacitor based on this composite electrode and activated carbon electrode exhibits a specific energy of 14.7 Wh kg-1 (Fg-1 (per active layer mass) and a reversible redox reaction at the potential of 1.4 V in a three electrode configuration per active layer mass. These results that that electrochemically prepared polyfluorene could be used as energy storage component for electrochem ical application.