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Electrolytic Characteristics of Fluoroethylene Carbonate for Electric Double-Layer Capacitors at High Concentrations of Electrolyte

Noritoshi NAMBU, Ryosuke TAKAHASHI, Masahiro TAKEHARA, Makoto UE, Yukio SASAKI
2013 Electrochemistry (Tokyo. 1999)  

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The use of partially fluorinated compounds as alternative solvents can increase the solubility of electrolytes and improve the performance of electric double-layer capacitors (EDLCs). The solubility of triethylmethylammonium tetrafluoroborate (TEMABF 4 ) in fluoroethylene carbonate (FEC) was 3.0 M (M = mol dm −3 ) or more at 25°C. The molar concentration of FEC in 2.5 M TEMABF 4 solution was higher than that of propylene carbonate (PC) in 2.0 M TEMABF 4 solution. The kinematic viscosity and
more » ... c conductivity of 2.0 M TEMABF 4 solution in FEC were slightly lower than those of the counterpart in PC at room temperature. The use of TEMABF 4 at the high concentrations in FEC slightly increased the gravimetric capacitance of coin cells.
doi:10.5796/electrochemistry.81.817 fatcat:f6rwuvpf4namplu5aohdeu5wce
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Noritoshi NAMBU, Ryosuke TAKAHASHI, Masahiro TAKEHARA, Makoto UE, Yukio SASAKI. "Electrolytic Characteristics of Fluoroethylene Carbonate for Electric Double-Layer Capacitors at High Concentrations of Electrolyte." Electrochemistry (Tokyo. 1999) 81.10 (2013) 817-819