Solid sodium-ion batteries (SSIBs) are considered as one of the promising energy storage systems because of their high safety and high energy density. However, the sodium metal anode presents poor wettability with a solid electrolyte, resulting in high interface impedance and dendrite growth, which severely limits their application in practice. Herein, a novel liquid film (Na-BP) interface is constructed between sodium and solid electrolyte (Na₃Hf₂Si₂PO₁₂) with an excellent kinetic mass transfer ability and good fluidity, which could guarantee a close contact and fast charge transfer at interface. The symmetric cells with the designed interface show a high-rate and long-cycle performance and could cycle stably more than 1000 and 700 h at 0.2 and 0.5 mA cm^–2, respectively. The critical current density of the cells can reach 3.6 mA cm^–2 at room temperature, which is the highest value in similar works.

中文翻译：

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固体钠离子电池快速离子传输液膜界面的原位构建

固态钠离子电池（SSIBs）因其高安全性和高能量密度而被认为是有前途的储能系统之一。然而，钠金属负极与固体电解质的润湿性差，导致高界面阻抗和枝晶生长，严重限制了其在实践中的应用。_{在此，在钠和固体电解质（Na 3} Hf ₂ Si ₂ PO ₁₂）之间构建了一种新型液膜（Na-BP）界面。) 具有优异的动力学传质能力和良好的流动性，可以保证界面的紧密接触和快速的电荷转移。^{具有设计界面的对称电池表现出高倍率和长循环性能，在 0.2 和 0.5 mA cm -2}下分别可以稳定循环超过 1000 和 700 小时。电池的临界电流密度在室温下可以达到3.6 mA cm ^{–2 ，是同类工作中的最高值。}