“…All the volatile materials used were handled using a vacuum line constructed of SUS316 stainless steel and tetrafluoroethylene–perfluoroalkylvinylether copolymer . All the nonvolatile materials were handled in a drybox in an atmosphere of dry Ar.…”
Section: Methodsmentioning
confidence: 99%
“…All the volatile materials used were handled using a vacuum line constructed of SUS316 stainless steel and tetrafluoroethylene−perfluoroalkylvinylether copolymer. 33 All the nonvolatile materials were handled in a drybox in an atmosphere of dry Ar. The [C 3 C 1 pyrr][FSA] (Kanto Chemical Inc., purity 99.9%, water content <39 ppm) and Na[FSA] (Mitsubishi Materials Electronic Chemicals Co., Ltd., purity 99%, water content <72 ppm) salts were dried under vacuum at 353 K.…”
Understanding ion transport in electrolytes is crucial for fabricating high-performance batteries. Although several ionic liquids have been explored for use as electrolytes in Na secondary batteries, little is known about the transport properties of Na + ions. In this study, the thermal and transport properties of Na[FSA]-[C 3 C 1 pyrr][FSA] (FSA − : bis(fluorosulfonyl)amide and C 3 C 1 pyrr + : N-methyl-Npropylpyrrolidinium) ionic liquids were investigated in order to determine their suitability for use as electrolytes in Na secondary batteries. In the x(Na[FSA]) range of 0.0-0.5 (x(Na[FSA]) = molar fraction of Na[FSA]), a wide liquid-phase temperature range was observed at close to room temperature. The viscosity and ionic conductivity of this system, which obey the Vogel-Tamman-Fulcher equation, increases and decreases, respectively, with an increase in x(Na[FSA]). Further, its viscosity and molar ionic conductivity satisfy the fractional Walden rule. The apparent transport number of Na + in the investigated ionic liquids, as determined by the potential step method at 353 K, increases monotonously with an increase in x(Na[FSA]), going from 0.08 for x(Na[FSA]) = 0.1 to 0.59 for x(Na[FSA]) = 0.7. The Na + ion conductivity, determined by multiplying the ionic conductivity with the apparent transport number, is an indicator of Na + ion transport in Na secondary batteries and is high when x(Na[FSA]) is in the 0.2-0.4 range.
“…All the volatile materials used were handled using a vacuum line constructed of SUS316 stainless steel and tetrafluoroethylene–perfluoroalkylvinylether copolymer . All the nonvolatile materials were handled in a drybox in an atmosphere of dry Ar.…”
Section: Methodsmentioning
confidence: 99%
“…All the volatile materials used were handled using a vacuum line constructed of SUS316 stainless steel and tetrafluoroethylene−perfluoroalkylvinylether copolymer. 33 All the nonvolatile materials were handled in a drybox in an atmosphere of dry Ar. The [C 3 C 1 pyrr][FSA] (Kanto Chemical Inc., purity 99.9%, water content <39 ppm) and Na[FSA] (Mitsubishi Materials Electronic Chemicals Co., Ltd., purity 99%, water content <72 ppm) salts were dried under vacuum at 353 K.…”
Understanding ion transport in electrolytes is crucial for fabricating high-performance batteries. Although several ionic liquids have been explored for use as electrolytes in Na secondary batteries, little is known about the transport properties of Na + ions. In this study, the thermal and transport properties of Na[FSA]-[C 3 C 1 pyrr][FSA] (FSA − : bis(fluorosulfonyl)amide and C 3 C 1 pyrr + : N-methyl-Npropylpyrrolidinium) ionic liquids were investigated in order to determine their suitability for use as electrolytes in Na secondary batteries. In the x(Na[FSA]) range of 0.0-0.5 (x(Na[FSA]) = molar fraction of Na[FSA]), a wide liquid-phase temperature range was observed at close to room temperature. The viscosity and ionic conductivity of this system, which obey the Vogel-Tamman-Fulcher equation, increases and decreases, respectively, with an increase in x(Na[FSA]). Further, its viscosity and molar ionic conductivity satisfy the fractional Walden rule. The apparent transport number of Na + in the investigated ionic liquids, as determined by the potential step method at 353 K, increases monotonously with an increase in x(Na[FSA]), going from 0.08 for x(Na[FSA]) = 0.1 to 0.59 for x(Na[FSA]) = 0.7. The Na + ion conductivity, determined by multiplying the ionic conductivity with the apparent transport number, is an indicator of Na + ion transport in Na secondary batteries and is high when x(Na[FSA]) is in the 0.2-0.4 range.
“…Volatile materials were handled in a reaction manifold made of 316 stainless steel and tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA). 27 Nonvolatile materials were handled under dry Ar atmosphere in a glove box. Sulfur tetrafluoride was synthesized according to the previous works.…”
“…Volatile materials were handled in a reaction line made of SS-316 stainless steel and tetrafluoroethylene-perfluoroalkylvinylether copolymer. 41 Nonvolatile materials were handled under dry Ar in a glove box. A nickel reactor (100 mL) was used for reactions.…”
Deoxofluorination of graphite oxide with sulfur tetrafluoride forms graphite oxyfluoride in the presence of hydrogen fluoride. Hydroxy and carbonyl groups are selectively fluorinated by this method.
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