Thermal and Transport Properties of Na[N(SO2F)2]–[N-Methyl-N-propylpyrrolidinium][N(SO2F)2] Ionic Liquids for Na Secondary Batteries
Thermal and Transport Properties of Na[N(SO2F)2]–[N-Methyl-N-propylpyrrolidinium][N(SO2F)2] Ionic Liquids for Na Secondary Batteries
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Na[N(SO2F)2]–[N-甲基-N-丙基吡咯烷鎓][N(SO2F)2]离子液体用于钠二次电池的热性能和输运性能
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
R. Hagiwara
中科院分区：
文献类型：
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作者：
K. Matsumoto;Y. Okamoto;T. Nohira;R. Hagiwara
了解电解质中的离子传输对于制造高性能电池至关重要。虽然已经探索了几种离子液体作为钠离子二次电池的电解质，但对Na+离子的输运性质知之甚少。为了确定Na[FSA]-[C3C1pyrr][FSA] （FSA -：双（氟磺酰基）酰胺和C3C1pyrr+: n -甲基- n -丙基吡啶鎓）离子液体作为Na二次电池电解质的适用性，本研究考察了它们的热性能和输运性能。在x（Na[FSA]）为0.0 ~ 0.5 （x(Na[FSA]) = Na[FSA]的摩尔分数）范围内，在接近室温的条件下，观察到较宽的液相温度范围。随着x（Na[FSA]）的增加，该体系的粘度和离子电导率分别增大和减小，服从Vogel-Tamman-Fulcher方程。此外，其粘度和摩尔离子电导率满足分数阶瓦尔登法则。研究了离子中Na+的表观输运数。
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]-[C3C1pyrr][FSA] (FSA–: bis(fluorosulfonyl)amide and C3C1pyrr+: N-methyl-N-propylpyrrolidinium) 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 ...