Abstract
Lithium (Li) metal is a promising anode candidate for high-energy-density batteries owing to its high theoretical capacity andlowelectrochemical potential. However, uneven Li nucleation, uncontrollabledendritic growth, infinite voltage changeand even safety issues hinder its commercial application. Herein, athree-dimensional(3D) framework of freestanding vanadium nitride nanowires (VN NWs) is established as Li host for dendrite-free Li metal anode. A lithiophilic Li3N interlayerwhichin-situformed by the surface reaction between molten Li and VN NWs is utilized to guidea uniform Li nucleation and deposition within the skeleton, as well as avoid the dendrite formation.Meanwhile, VN NWs candecreaselocal current density, homogenize Li-ion fluxand accommodate volume fluctuations of the anodedue to its 3D structure with high electron conductivity. Thus, the corresponding composite Li metal anodedeliversa long-life span of 500 cycles (1000 hrs) at a current density of 0.5 mA cm-2, and exhibits lower nucleationover-potentialand voltage hysteresisatdifferent current densities from 0.5~5 mA cm-2in carbonate electrolyte.In conclusion, this work provides a new typeofscaffold with both high electronic conductivity and excellent lithiophilicity for stable Li anodes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
