An All-Solid-State Electrochemical Double-Layer Capacitor Based on a Plastic Crystal Electrolyte

摘要: A plastic crystal, solid electrolyte was prepared by mixing tetrabutylammonium hexafluorophosphate salt, (C4H9)4NPF6, (10 molar %) with succinonitrile, SCN, (N C−CH2−CH2−C N), [SCN-10%TBA-PF6]. The resultant waxy material shows a crystalline phase that extend from -36 °C up to its melting at 23 °C. It high ionic conductivity reaching 4 × 10−5 S/cm in the crystal (15 °C) and ~ 3 10−3 molten state (25 °C). These properties along electrochemical stability rendered use of this as an double-layer capacitor (EDLC). EDLC assembled performance tested cyclic voltammetry, AC impedance spectroscopy galvanostatic charge-discharge methods. Specific capacitance values range 4-7 F/g. (of electrode active material) were obtained 15 °C, although compare well those reported for some polymer electrolytes, can be still enhanced further development device components, only demonstrate their great potential capacitors new application.