Bismuth/Tin-based artificial interface for overcoming the anode passivation of rechargeable magnesium batteries

Abstract

A simple strategy of fabricating artificial interface consisting of Bi and Sn on Mg surface has been proposed to alleviate passivation issues. The nucleation and deposition overpotential of this fabricated BiSn@Mg anode are reduced remarkably. The BiSn@Mg//BiSn@Mg cell with very low overpotential can run stably for 4000 h and exhibits good rate capability. The formated artificial interface enhances Mg affinity to the anode-electrolyte interface and reaction kinetics. This study promotes the development of reversible plating/stripping of Mg in ether-based electrolytes.