Anchored Zn(002) Orientation with Rapid Interfacial Response Guiding High-Utilization Alloy Anode and Ah-Scale...

Reversibility of zinc anode under high utilization and rational ampere-hour (Ah)-scale evaluation represents a key metrics for practical aqueous zinc metal batteries (AZMBs), but it suffers from uncontrolled host-less plating/stripping and disordered interfacial behaviors. Herein, we develop a highly (002) plane-oriented alloy anode with lattice orientation anchoring effect and rapid interfacial response for Ah-scale AZMBs. The minimal Sn (200)-Zn (002) lattice mismatch and strong atomic bonding interactions synergistically drive epitaxial nucleation kinetics and orientation-anchored Zn (002) deposition. It also reduces the diffusion energy barrier of interfacial Zn²⁺, thereby facilitating the ordered ion migration and ensuring rapid ion transport channels at the interface. Consequently, the engineered symmetric cells deliver excellent cyclic stability of 890 h at 80% DOD and 200 h at 90% DOD, respectively. The full cells maintain cyclic stability over 5000 cycles. The pouch cells with approximately 4 mAh cm^-2 and a N/P ratio of 2.56 maintain a capacity retention of 93% after 500 cycles. Remarkably, the Ah-scale pouch cells with anode areal capacity of 4.16 mAh cm^-2, N/P ratio of 2.40, cathode loading of 20.67 mg cm^-2 can cycle steadily for over 200 cycles. This work contributes to a path for designing high-utilization zinc anodes for Ah-scale AZMBs.