Preparation and Characterization of an Alkaline Poly(vinyl alcohol) Electrolyte with High Ambient Conductivity
- Received Date: 2004-06-21
- Polymer-in-salt, Alkaline polymer electrolyte, Poly( vinyl alcohol), Ionic conductivity /
Abstract: A type of polymer-in-salt electrolyte composed of poly( vinyl alcohol), KOH and water was prepared by a solution casting method. X-ray diffraction proves that the high concentration of KOH in the electrolyte is in an amorphous state. The ionic conductivities of the PVA-KOH-H2O electrolytes increased as the concentration of KOH increased, and the alkaline electrolyte with PVA/KOH 1/3 (mass ratio) exhibited the highest ionic conductivity of 0. 15 S/cm at room temperature, as measured by electrochemical impedance spectroscopy. The temperature dependence of the conductivity is found to be in agreement with the Arrhenius equation. The potential stability window at the metal/electrolyte interface was of 1.4 V for the nickel electrode determined by cyclic voltammetry.
|Citation:||Li Zhiying, Liu Yang, Liu Hongtao, He Ping, Li Jinghong. Preparation and Characterization of an Alkaline Poly(vinyl alcohol) Electrolyte with High Ambient Conductivity[J]. Chinese Journal of Chemical Physics , 2005, 18(4): 625-630. doi: 10.1088/1674-0068/18/4/625-630|