LAUSR

Lithium metal fits the growing demand of high-energy density rechargeable batteries because of its high specific capacity and low redox potential. However, the lithium-metal anodes are abandoned by various defectives. In this study, we apply the composite plating into the protection of lithium-metal anodes. We confirmed that Mg3N2 nanoparticle dispersed in ether electrolyte can be easily composite plated with lithium, resulting in flat, dense, and dendrite-free lithium deposition layer during the electrodeposition process. In addition, the Mg3N2 plated in the lithium metal phase would be reaction with lithium, then generate a Li3N-riched SEI layer, mitigating continuous side reactions of electrolyte on the Li metal. And another product of the reaction is Mg which can work as lithiophilic sites in electrodeposition. The combined effect of the two fields can effectively improve the performance of lithium metal anodes. The Li3N-riched SEI layer grow well on the surface of 3D lithium anode by composite plating. Furthermore, composite plating with Mg3N2-containing electrolyte is a viable route that can carry on various 3D current collectors easily with small volume effect. Here, we show that the composite plating 3D lithium metal anode is successfully applied in the Li-S battery with a long lifetime.