Electrolysis-based technology is a potential low-cost method for Li extraction from seawater that can bridge the gap between the supply and demand. An all-solid-state electrochemical device can effectively prevent the side reactions of metallic lithium and liquid organic electrolyte. However, its Li-ion conductivity is at least three orders of magnitude lower than expected due to extremely poor wetting between the metallic Li and the solid-state electrolyte (SSE). To overcome this problem, an artificial interface-modified solid-state sandwich device with a TiO₂ layer (Li/TiO₂/SSE) is developed. The lithiated Li_xTiO₂ film improves physical contact between Li and the SSE, and the interfacial resistance is reduced by 2–3 orders of magnitude. The average Li extraction efficiency of the solid-state device reaches 110 μg-Li/cm² over 1 h in natural seawater via a flow-through column system. Charging voltage fluctuations of ±0.05V reveal the stability and reliability of the artificially modified device over 40 cycles. These superior properties demonstrate the potential of this system as a next-generation electrolysis-based device for Li extraction from natural seawater.

基于电解的技术是一种从海水中提取锂的潜在低成本方法，可以弥合供需之间的差距。全固态电化学装置可有效防止金属锂与液态有机电解质的副反应。但是，由于金属Li和固态电解质（SSE）之间的润湿性极差，其Li离子电导率比预期低至少三个数量级。为了克服这个问题，开发了具有TiO ₂层（Li / TiO ₂ / SSE）的人工界面改性的固态夹心器件。锂化Li _x TiO ₂薄膜改善了Li与SSE之间的物理接触，界面电阻降低了2-3个数量级。通过流过柱系统，在天然海水中1小时内，固态设备的平均Li提取效率达到110μg-Li/ cm ²。±0.05V的充电电压波动显示了经过40次循环的人工修改后的器件的稳定性和可靠性。这些优越的性能证明了该系统作为下一代基于电解的从天然海水中提取锂的装置的潜力。