Facile Lithiophilic 3D Copper Current Collector for Stable Li Metal Anode

Lithiophilic hosts are confirmed to effectively enhance the electrochemical stability of lithium (Li) anodes, thereby guaranteeing safe, practical application Li metal as anode in rechargeable Li-ion batteries. This study reveals a lithiophilic three-dimensional copper current collector (Ag@CF). Silver (Ag) nanoparticles were anchored on surface skeleton foam (CF) via facile displacement reaction under ultrasonic conditions. The introduced Ag nanoparticle layer reduces nucleation barrier Li, leading homogeneous and plating. Simultaneously, porous Ag@CF provides structural support storage volume anode, eliminating its change process plating/stripping. Benefiting from above, electrode shows superior performance half-type cells (near 100% coulomb efficiency for 350 cycles at 1 mA cm−2). Composite electrodes (Li-Ag@CF) preloaded network deliver an ultra-long lifespan over 1600 h with low over-potential cm−2 Li-Ag@CF symmetric cells. Furthermore, LiFePO4∣Li-Ag@CF full display enhanced capacity retention (over 80% 800 or 3 C). More importantly, this method is facile, large-scalable, low-cost, which offers alternation strategy stable anodes.