▎ 摘　　要

Optimization of lithium metal anode is a pivotal part in facilitating the evolution of next-generation high energy density solid-state lithium metal batteries (LMBs). However, the practical application of lithium anode in solidstate LMBs is limited by uncontrollable dendrite growth and the poor interfacial contact with solid electrolyte. Herein, a 40 mu m thin lithium composite anode based on the AlN-embedded reduced graphene oxide (rGO) scaffold synthesized via one-step molten lithium infusion is proposed. The resulting lithiophilic Li-Al alloy and high ion-conductive Li3N in situ constructed the lithium ion diffusing highways inside electrode, enabling a well oriented Li deposition and effectively inhibiting the dendrite growth. Combined with in-situ polymerization and Li3N-modified solid electrolyte interphase (SEI), the composite anodes can prolong the lifespan of symmetric cell to 2100 h at 0.2 mA cm(-2)/0.2 mAh cm(-2) in carbonate-based solid polymer electrolytes. Moreover, LAG||LiFePO4 full cells also excelled in cycling capability and rate performance. This modified electrode offers a promising synergistic solution for designing high-performance solid-state LMBs.