Novel 3D Nanoporous Zn-Cu Alloy as Long-Life Anode toward High-Voltage Double Electrolyte Aqueous Zinc-Ion Batteries.

The recharge ability of zinc metal-based aqueous batteries is greatly limited by the zinc anode. The poor cycling durability of Zn anodes is attributed to the dendrite growth, shape change and passivation, but this issue has been ignored by using an excessive amount of Zn in the past. Herein, a 3D nanoporous (3D NP) Zn-Cu alloy is fabricated by a sample electrochemical-assisted annealing thermal method combined, which can be used directly as self-supported electrodes applied for renewable zinc-ion devices.