2D Conductive Metal–Organic Framework with Anthraquinone Built‐In Active Sites as Cathode for Aqueous Zinc Ion Battery

Abstract 2D conductive metal–organic frameworks (2D c ‐MOFs) as emerging 2D graphene‐like crystalline materials have become a promising platform for energy storage. However, their capacity is largely constrained by the limited number of electroactive sites. Integrating multiple redox‐active moieties into the 2D c ‐MOF skeletons is an efficient strategy toward high‐performance battery cathodes. Herein, by tailoring an anthraquinone‐based multitopic catechol ligand, a novel quinone‐containing copper‐catecholate MOF (Cu‐TBPQ MOF) is successfully developed. The Cu‐TBPQ MOF exhibits abundant porosity, excellent conductivity, and multiple redox‐active sites. These characteristics make it an ideal candidate as a cathode material for zinc ion batteries. Notably, the Cu‐TBPQ MOF demonstrates an impressive reversible specific capacity of 371.2 mAh g −1 at a current density of 50 mA g −1 . Furthermore, it exhibits outstanding rate capability and long‐term durability, retaining a capacity of 120.3 mAh g −1 at a high current density of 2.0 A g −1 even after 500 charge–discharge cycles. The successful enrichment of redox‐active sites in the work opens up new avenues for the rational design of electrochemically active 2D c ‐MOFs, enhancing their potential for advanced energy storage applications.