Anchored Zn(002) Orientation with Rapid Interfacial Response Guiding High‐Utilization Alloy Anode and Ah‐Scale Aqueous Zinc Metal Batteries
Mingzhu Li, Zhexuan Liu, Yajue Zhang, Shuquan Liang, Xin Wang, Guozhao Fang
Abstract
Abstract 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 Zn 2+ , 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.