Three-dimensional covalent organic framework-based artificial interphase layer endows lithium metal anodes with high stability.

To gain a deeper understanding and address the scientific challenges of lithium dendrite growth, a robust solid-state electrolyte interface (SEI) with good mechanical properties and rapid ion conduction is crucial for the advancement of lithium metal batteries. Artificial SEI layers based on organic polymers, such as covalent organic frameworks (COF), have garnered widespread attention due to their flexible structural design and tunable functionality. In this work, a COF with 3D spatial geometric symmetry and a fully covalent topology was synthesized and used as artificial SEI layers.

Enhancing the Stability of Metallic Li Anodes for Aprotic Li-O Batteries with Dual-Anion Electrolytes.

Despite the impressive specific capacity of Li-O batteries, challenges persist, particularly with lithium metal anode (LMA). These include dendritic growth and unstable solid electrolyte interface (SEI) layers, which become more pronounced in an oxygen-rich environment, a typical operation scenario for Li-O batteries. Herein, utilizing a hybrid dual anion electrolyte (DAE) strategy, which incorporates both inorganic LiNO and organic Li[(FSO)(CFSO)N] (LiFPFSI) salts, the dendritic growth is evidently inhibited by creating a "concrete-like" SEI structure.