An ultrastrong 3D architecture interface with fast and smooth Li-ion deposition for high-capacity Li metal anode

Lithium metal anode (LMA) is one of the most promising anodes for high-performance energy storage system in the future, which is limited by dendrite growth and volume expansion. Herein, a 3D lithium metal anode modification composed of nanodiamond particles coated by MgO and amorphous carbon is devel-oped to balance the physical stability and Li-ion conductivity for large-capacity LMA. Diamond with high Young's modulus leads lateral growth of dendrites, while stacked particles disperse the local current density. Formed by displacement reaction, Li-Mg alloy renders diamond-based anode with rich ion trans-mission channels and high lithiophilicity, contributing to low nucleation overpotential. As a result, with large capacity of 10 mAh cm-2 at high current density of 5 mA cm-2, the composite anode can cycle stably for over 1200 h with small overpotential at about 30 mV.(c) 2022 Elsevier B.V. All rights reserved.