Facile Electrolytic (111)-Textured Copper Foil for Dendrite-Free Zinc Metal Batteries

Aqueous Zn metal batteries are emerging as a promising candidate for the next-generation largescale energy storage system due to their high safety, low lost, and eco-friendliness. Nevertheless, their practical application is restricted by the uncontrollable Zn dendrite growth and the limited utilization of the Zn metal anode. Herein, a room temperature electrodeposition strategy based on an optimized rate relationship between the diffusion and consumption of Cu2+ to prepare a (111)-textured Cu current collector for the construction of the dendrite-free Zn metal anode with high reversibility is developed. Attributed to the high lattice match between the (002) facet of Zn with the (111) facet of Cu, the deposition of Zn along its [001] orientation is achieved on the (111)-textured Cu. The (002) facets horizontally aligned with the current collector endow Zn with the dendrite-free planar construction and superior corrosion resistance, resulting in a high reversibility with a long life-span over 2186 cycles. Impressively, the resultant Zn anodes can stabilize the operation of pouch cells with an extremely demanding negative-to-positive capacity ratio of 2. This work provides a new avenue for the development of the current collectors for the low-cost sustainable energy storage. A (111)-textured Cu current collector which highly match with the (002) facets of Zn is reported for the construction of the dendrite-free Zn metal anode with high reversibility. The (002) facets of Zn horizontally aligned with the current collectors endow Zn with the dendrite-free planar construction and superior corrosion resistance. Consequently, the metal anodes display high reversibility and outstanding performance. image