Metal solid-state batteries are regarded as the next-generation energy storage systems with high energy density and high safety. A robust and intimate solid-state interfacial contact between the sodium metal with the solid-state electrolyte (SSE) is vital to achieve good cyclic stability at high current density. However, inorganic SSEs suffer from poor stability when cycling at a current density below 2 mA cm⁻². This can be ascribed to the dendrite formation through the SSE due to plating process or void formation during the stripping process. Furthermore, simply direct application of a sodium metal on SSE shows poor interfacial contact and low critical current density. In this review, the recent development of inorganic sodium-ion electrolytes, such as oxide-, sulphide-, and halide-based, are briefly discussed. More particularly, the dendrite formation through the SSE and the loss of solid-solid contact at the sodium/SSE interface are reviewed. Additionally, different engineering approaches to integrate the sodium metal with the solid-state electrolytes and its correlation with the electrochemical performance are discussed. Finally, perspectives in future researches are identified.

金属固态电池被视为具有高能量密度和高安全性的下一代储能系统。钠金属与固态电解质（SSE）之间牢固而紧密的固态界面接触对于在高电流密度下实现良好的循环稳定性至关重要。但是，无机SSE在低于2 mA cm ^-2的电流密度下循环时，稳定性较差。这可以归因于由于镀覆过程或在剥离过程中形成空隙而通过SSE形成的枝​​晶。此外，仅将钠金属直接施加在SSE上会显示不良的界面接触和较低的临界电流密度。在这篇综述中，简要讨论了无机钠离子电解质的最新发展，例如基于氧化物，硫化物和卤化物的电解质。更特别地，回顾了通过SSE形成的枝​​晶和在钠/ SSE界面处的固-固接触的损失。此外，还讨论了将钠金属与固态电解质集成在一起的不同工程方法及其与电化学性能的关系。最后，确定了未来研究的观点。