Zn Powder-Based Anodes for Aqueous Zn Metal Batteries: Strategies, Structures, and Perspectives

Aqueous zinc metal batteries (ZMBs) have attracted much attention in the field of grid-scale energy storage due to their high safety, low cost, and abundant resources. Zn powders exhibit the unique advantages of high specific surface area, mature scaled-up manufacturing ability, and structural tunability, which can meet the large-scale energy storage devices, and even the special-shaped devices. However, Zn powder-based anodes are at an early stage and far from the practical industrial application. With the pursuit of comprehensive electrochemical performances of Zn powder-based anodes, this review focus on the advances, issues, and optimized strategies, which are discussed systematically from the previous reports of Zn powder-based anodes. Meanwhile, we also added many supplementary discussions of some important strategies in relevant content but not yet reported. Finally, future prospects toward high performance and practicability of Zn powder-based anodes are proposed, which will provide scientific guidance for the practical application of ZMBs.