Ionic Conductivity of Sodium Ion with NaCF3SO3 Salts in Electrolyte for Sodium Batteries
To find out the proper sodium ion conducting electrolyte at room temperature, we investigated the ac impedance measurement of PVdF gel polymer electrolyte and liquid tetraglyme(TEGDME) with various concentrations of sodium trifluoromethane sulfonate(NaCF3SO3). The concentration of NaCF3SO3 did not severely affect the ionic conductivity. The sodium ionic conductivity using TEGDME with NaCF3SO3 was about 3.3×10-4 S㎝-1 which was lower than that of the PVdF gel polymer electrolyte, 5.0×10-4 S㎝-1. From the viewpoint of ionic conductivity, PVdF gel polymer electrolyte was proper electrolyte for sodium battery.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
T.-B. Kim et al., "Ionic Conductivity of Sodium Ion with NaCF3SO3 Salts in Electrolyte for Sodium Batteries", Materials Science Forum, Vols. 486-487, pp. 638-641, 2005