This study describes the use of the ionic liquid trimethylsulfonium bis(trifluorosulfonimide) [Me 3 S][TFSI] as an electrolyte for carbon-based supercapacitors at temperatures up to 80 °C. [Me 3 S][TFSI] is synthesized by a metathesis reaction, possesses a low melting point (T m = 45.5 °C), and presents crystal plastic behavior indicated by a strong organizational structure with many possible conformations corresponding to several solid−solid phase transitions T S−S . Furthermore, [Me 3 S][TFSI] is thermally stable up to T = 280 °C and presents a high conductivity up to 20.42 mS cm −1 at 80 °C and a low viscosity, 3 mPa s, at the same temperature. The combination of a good cycling ability with high capacities up to 150 F g −1 at elevated voltage and temperature, i.e., ΔE = 3 V, T = 80 °C, enables the realization of supercapacitors with high specific energies at high temperatures.
The corrosion behaviour of tin in a synthetic medium similar to an industrial water has been studied by using electrochemical methods (plotted potentiodynamic curves and polarization resistance measurement). The effect of pH variation, temperature and concentration of anions in solution has been investigated. The results obtained show that pH variation (around the value 8.2 of the synthetic medium) has no effect on the pitting sensitivity of tin. However, the increasing of temperature in the range of 2070°C accelerates the corrosion process. The presence of anions Cl and SO42 leads to pitting corrosion of tin. Cl ions are more aggressive than SO42 ions, whereas HCO3 ions acted as an inhibitor for pitting corrosion of tin in the studied medium.Key words: tin, corrosion, pitting, industrial water.
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