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[Display omitted] Development of high energy density lithium-metal batteries (LMBs) is markedly hindered by the interfacial instability on lithium-metal anode side. Solid-electrolyte interphase (SEI) is a fundamental factor to regulate dendrite growth and enhance the stability of lithium-metal anodes. Here, trithiocyanuric acid, a triazine derivative with sulfhydryl groups, is used as an efficient promoter to favor the construction of a robust artificial SEI layer on the lithium metal surface, which greatly benefits the stability and efficiency of LMBs. With the assistance of trithiocyanuric acid facilely introduced on the Li surface via a one-step solution route, a highly uniform artificial SEI layer rich in Li 2 S and Li 3 N is formed, which efficiently facilitates uniform lithium deposition and suppresses lithium dendrite growth. Remarkably, the Li|Li cell displays stable lithium plating/stripping cycling over 800 h at 0.5 mA cm−2, 1 mAh cm−2, and the Li|LFP cells exhibit prolonged lifespan over 700 cycles at 3 C and superior rate performance from 2 to 20 C. This work provides a facile design strategy for constructing a superb artificial SEI layer for high-performance LMBs. [ABSTRACT FROM AUTHOR]

• Oxygen vacancy-enriched Co 3 O 4 nanowire arrays decorated on nickel foam is used for a dendrite-free Li metal anode. • The O vacancy -enriched metal oxides meet the ionic/electronic diffusion kinetics at the initial stage of lithium deposition. • The lithium utilization rate of red-Co 3 O 4 /NF at the current density of 1 mA cm−2 is 98.5%. [Display omitted] Lithium metal as a promising anode material has been widely applied in many advanced high-energy density batteries. However, uncontrollable Li dendrite formation and infinite volume expansion in lithium anode result in short lifespan and severe safety hazards. In this contribution, we report that utilization of oxygen vacancy-enriched Co 3 O 4 nanowire arrays as lithiophilic material is an effective strategy to obtain ultra-long stable lithium metal anode. The oxygen vacancy can serve as electronic charge carrier to facilitate electron transfer. Moreover, it can induce the generation of local electric field to accelerate lithium ions migration and enable uniform Li+ distribution, which are beneficial for homogeneous lithium nucleation. Combining the excellent ionic/electronic diffusion and the volume buffer offered by the nanowire arrays, the obtained electrode shows high coulombic efficiency of 98.5% at 1 mA cm−2 for 230 cycles. [ABSTRACT FROM AUTHOR]