In Situ Grown Li2Te Enhanced Lithium Metal Anode Interfacial Kinetics

Abstract Lithium metal anode (LMA) is expected to be the ideal anode material for future high‐energy‐density batteries, but regulating the complex electrolyte–anode interface remains a challenge. In this work, a stable Li 2 Te coating is formed on the surface of commercial copper mesh (LTCM) using a simple and quick method to improve lithium metal anode interfacial kinetics. Li 2 Te possesses a strong affinity for both Li + and TFSI − anions, which reduces the lithium nucleation barrier and guides the formation of inorganic‐rich SEI, accelerates the diffusion of Li + , and promotes the growth of lithium metal along the plane. The highly conductive Li 2 Te and Cu generated by in situ lithiation reaction together constitute an effective electron‐conducting network, which synergistically enhances the interfacial kinetics and the cycling stability of LMA. As a result, the LTCM maintains high Coulombic efficiency (98%) even after 2200 cycles at 1 mA cm −2 , whereas the symmetric cell has a long cycle life of over 5400 h at 1 mA cm −2 . In addition, the full cells with LFP display a high capacity retention ratio (80%) after 480 cycles at 1 C and the corresponding pouch cell can cycle steadily more than 464 cycles at 1 C, which has good application prospects.