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Abstract Symmetric and aliphatic trialkylsulfonium cation form room temperature molten salts (RTMS) with bis(trifluoromethylsulfonyl)imide (TFSI). In particular RTMS based on triethylsulfonium shows low melting point (−35 °C) and the lowest viscosity (30 mPs at 25 °C) of all the TFSI based RTMS as reported so far. The conductivity of 7.1 mS cm−1 at 25 °C is the highest of all the non-chloroaluminate RTMS based on aliphatic onium cations.
Matsumoto et al. (Fri,) studied this question.