Rare earth bimetallic organic framework‐derived lean‐zinc anodes for highly reversible zinc‐metal batteries

Abstract Aqueous zinc‐metal batteries have many advantages, including high safety, low cost, and environmental friendliness. Nevertheless, the poor cycling stability hinders their practical application. Mitigating the irreversible Zn 2+ loss at the interface between the electrode and electrolyte, as well as inside the electrode, is an effective strategy to achieve high cycling stability. Herein, a novel lean‐zinc anode is proposed, which is carried out by annealing LaZn bimetallic organic framework to form metal oxides and derived carbon. The anode has a low voltage hysteresis and low nucleation overpotential, further achieves high plating/stripping reversibility. The good electrochemical properties are attributed to the highly stable anode, which contains a large layer spacing La 2 O 3 with a low lattice mismatch degree to Zn 0 . This anode facilitates rapid ion transport and uniform Zn 0 deposition at the interface, which helps to alleviate the irreversible Zn 2+ loss. On this basis, the assembled batteries can maintain excellent stability for over 3000 cycles. This illustrates the promising application of rare‐earth‐based bimetallic‐derived anodes in aqueous zinc‐metal batteries.