In situ built interphase with high interface energy and fast kinetics for high performance Zn metal anodes

An in-situ SEI with Zn₃(PO₄)₂ and ZnF₂ was built on Zn anode via KPF₆-induced chemical strategy. With high interface energy and fast kinetics, it leads to record cumulative capacity and the product of largest current density and areal capacity.