The sodium metal anode is a promising anode for the next generation of batteries because of its high specific capacity and abundant resources. However, the poor cyclic stability hinders its practical application. We report a facile strategy of in-situ constructing sodiophilic alloying sites for Na metal anodes by using Zn foil as the current collector, which enables smooth and compact deposition morphology and excellent cyclic stability. Zn current collector and the initial deposited Na generate a NaZn13 alloy interface, which can guide the subsequent plating/stripping behavior of Na. As a result, the sodium metal anode with Zn current collector exhibits ultrahigh stability with Coulombic efficiency (CE) of 99.87% (over 450 cycles at 1 mA cm-2 for 1 mAh cm-2). Furthermore, the impressive capacity retention (98.5% after 40 cycles at 0.5C) in Zn||NVP (Na3V2(PO4)3) batteries suggests anticipated application prospect of Zn current collector in anode-free sodium metal batteries, which opens up a new way for the development of the next generation of safe and efficient sodium metal anodes.

No abstract

No abstract

No abstract

No abstract