Rationalized Electroepitaxy toward Scalable Single-Crystal Zn Anodes.

Electroepitaxy has been recognized as an effective approach to prepare metal electrodes with nearly complete reversibility. Nevertheless, large-scale manipulation is still not attainable owing to complicated interfacial chemistry. Here, w e demonstrate the feasibility of extending Zn electroepitaxy toward the bulk phase over a mass-produced mono-oriented Cu(111) foil. Interfacial Cu-Zn alloy and turbulent electroosmosis w ere circumvented by adopting a potentiostatic electrodeposition protocol. The as-prepared Zn single-crystalline anode enabled stable cycling of symmetric cells at a stringent current density of 50.0 mA cm -2 . The assembled full cell further sustained a capacity retention of 95.7% at 5.0 A g -1 for 1500 cycles, accompanied by a controllably low N/P ratio of 7.5. In addition to Zn, Ni electroepitaxy can be realized by using the same approach. This study might inspire rational exploration of the design of high-end metal electrodes. This article is protected by copyright. All rights reserved.