Non-aqueous gel polymer electrolyte with phosphoric acid ester and its application for quasi solid-state supercapacitors

Anna A. Łatoszyńska (1) , Grażyna Zofia Żukowska (1) , Iwona A. Rutkowska (2) , Pierre-Louis Taberna (3) , Patrice Simon (3, 4) , Pawel J. Kulesza (2) , Władysław Wieczorek (1)

1 Warsaw University of Technology [Warsaw]
2 UW - University of Warsaw
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
4 RS2E - Réseau sur le stockage électrochimique de l'énergie

A mechanically-stable non-aqueous proton-conducting gel polymer electrolyte that is based on methacrylate monomers, is considered here for application in solid-state type supercapacitors. An electrochemical cell using activated carbon as active materials and the new gel polymer electrolyte has been characterized at room temperature using cyclic voltammetry, galvanostatic charge–discharge cycle tests as well as impedance spectroscopy. The use of phosphoric acid ester (instead of phosphoric acid) as a proton donor has led to an increase of both the operation voltage window (up to 1.3 V) and the electrolyte ionic conductivity (on the level of an order of magnitude). The resulting double layer capacitance of the microporous activated carbon was found to be as high as 120 F g−1; even more important, the supercapacitor utilizing non-aqueous proton-conducting gel polymer electrolyte is well-behaved in the wide temperature range (namely, from −40 to 80 °C).

Mots clés: Gel polymer electrolytes; Phosphoric acid ester; Electrochemical capacitor; Wide temperature range

Domaines: Matériaux

Anna A. Łatoszyńska, Grażyna Zofia Żukowska, Iwona A. Rutkowska, Pierre-Louis Taberna, Patrice Simon, et al.. Non-aqueous gel polymer electrolyte with phosphoric acid ester and its application for quasi solid-state supercapacitors. Journal of Power Sources, 2015, vol. 274, pp. 1147-1154. ⟨10.1016/j.jpowsour.2014.10.094⟩. ⟨hal-01159400⟩