Construction of interphase-modified 3D-Zn@Zn3(PO4)2 anode for zinc-ion batteries

High-performance 3D-Zn@Zn 3 (PO 4 ) 2 anode was constructed by a simple two-step strategy with 3D-Zn electrode prepared via electrodeposition followed by Zn 3 (PO 4 ) 2 protective layer decorated on its surface via chemical reaction exhibiting good universality. 3D-Zn@Zn 3 (PO 4 ) 2 anode demonstrated high hydrogen evolution overpotential and transference number of Zn 2+ besides low desolvation energy barrier and rapid transfer kinetics of Zn 2+ . Its symmetric cell could understand more than 1200 h at 1 mA cm −2 for 1 mA h cm −2 . When the anode was assembled into zinc-ion battery with MnO 2 cathode, it delivered specific capacity of 229.43 mA h g −1 at 0.1 A g −1 as well as exhibited remarkable rate capability and long-term cycling stability with capacity retention of 65.0% and Coulombic efficiency of 99.6% after 400 cycles under 1 A g −1 . The synergistic effect was studied between Zn 2+ -conductive hopeite layer and 3D-Zn electrode with (002) crystal plane orientation as well as three-dimensional (3D) microstructure as a template.