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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Tin-based ionic chaperone phases to improve low temperature molten sodium-NaSICON interfaces
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Tin-based ionic chaperone phases to improve low temperature molten sodium-NaSICON interfaces

机译：基于锡的离子伴侣阶段，改善低温熔融钠 - Nasicon界面

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High temperature operation of molten sodium batteries impacts cost, reliability, and lifetime, and has limited the widespread adoption of these grid-scale energy storage technologies. Poor charge transfer and high interfacial resistance between molten sodium and solid-state electrolytes, however, prevents the operation of molten sodium batteries at low temperatures. Here,in situformation of tin-based chaperone phases on solid state NaSICON ion conductor surfaces is shown in this work to greatly improve charge transfer and lower interfacial resistance in sodium symmetric cells operated at 110 degrees C at current densities up to an aggressive 50 mA cm(-2). It is shown that static wetting testing, as measured by the contact angle of molten sodium on NaSICON, does not accurately predict battery performance due to the dynamic formation of a chaperone NaSn phase during cycling. This work demonstrates the promise of sodium intermetallic-forming coatings for the advancement of low temperature molten sodium batteries by improved mating of sodium-NaSICON surfaces and reduced interfacial resistance.
机译：熔融钠电池的高温操作会影响成本，可靠性和寿命，并限制了这些网格级能量存储技术的广泛采用。然而，熔融钠和固态电解质之间的电荷转移和高界面抗性可防止在低温下熔融钠电池的操作。这里，在固态Nasicon离子导体表面上的基于锡的伴侣相的情况下，在这项工作中示出了大大提高电荷转移，并在110摄氏度下在110摄氏度下操作的钠对称电池的较低界面抗性，其致强度为50 mA cm （-2）。结果表明，通过NASICON上的熔融钠的接触角测量的静态润湿测试，由于循环期间伴侣NASN相的动态形成，不能精确地预测电池性能。这项工作通过改进的钠 - 钠表面和降低的界面抗性，通过改善交配和降低的界面抗性，证明了用于高温熔融钠电池的促进的金属间形成硅酸钠的承诺。

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