Li–air battery exhibits a promising prospect as energy conversion and storage devices due to its ultrahigh theoretical energy density. However, lithium metal as anode is hampered due to the intricate ambient electrochemical environment especially in the open and semi-open batteries. Herein a strategy that in situ fabricating dual-phase protective interface is proposed to improve the durability of lithium metal anode for Li–air battery. A thin film generates and contacts intimately on the surface via floating lithium foil on a silane mixed solution, then the inorganic particles Li₆(Si₂O₇) appear adaptively and embeds in the Si-O-Si polymer during the initial lithium plating/stripping process. The in-situ integration of inorganic particles and polymer matrix enable the interface to possess a dense morphology, high mechanical rigidity, high lithium ions conductivity and high interface energy, defending the attack of moisture and O₂⁻ and furthermore keeping a homogeneous Li⁺ deposition even at high local current density. As a result, an outstanding improvement on the reversibility of Li–air battery is achieved with 180 cycles at a high current density of 1000 mA g⁻¹ and capacity control of 1000 mAh g⁻¹ in air atmosphere (O₂:N₂:H₂O = 4:16:3).

锂空气电池由于其极高的理论能量密度而在能量转换和存储设备方面显示出广阔的前景。然而，由于复杂的环境电化学环境，特别是在开放式和半开放式电池中，阻碍了锂金属作为阳极的使用。本文提出了一种原位制造双相保护界面的策略，以改善锂空气电池的锂金属负极的耐用性。薄膜通过在硅烷混合溶液中漂浮的锂箔在表面上紧密生成并接触，然后无机锂离子Li ₆（Si ₂ O ₇）自适应地出现并在最初的锂电镀/电镀过程中嵌入Si-O-Si聚合物中。剥离过程。在原位无机颗粒和聚合物基体的整合允许接口具有致密的形态，高机械刚性，高锂离子导电率和高的界面能量，保卫水分的进攻和O ₂ ^-和进一步保持均匀的李⁺在高的局部沉积甚至当前密度。结果，在空气电流为1000 mA g ^-1的高电流密度和1000 mAh g ^-1的容量控制下，通过180个循环可实现锂空气电池可逆性的显着改善（O ₂：N ₂： H ₂ O = 4：16：3）。