Triazacoronene‐Based 2D Conductive Metal–Organic Framework for High‐Capacity Lithium Storage

Abstract 2D conductive metal–organic frameworks (2D c ‐MOFs) have attracted increasing attention as promising electrode materials for rechargeable batteries due to their designable periodic motifs, large specific surface areas, and prominent electrical conductivity. However, the development of 2D c ‐MOF electrode materials with functionality remains a significant challenge because of the limited electroactive ligand motifs available. Herein, a hexahydroxy‐substituted triazacoronene ligand (6OH‐TAC) is deliberately designed and synthesized, which coordinates with Cu 2+ ions to form an unprecedented 2D c ‐MOF (Cu‐TAC) with functionality sites of efficient lithium storage. The synergistic effect of TAC and CuO 4 enables Cu‐TAC as an anode for lithium‐ion batteries with a superior reversible capacity of 772.4 mAh g −1 at 300 mA g −1 , remarkable rate performance, and outstanding long‐term cyclability (83% capacity retention at 300 mA g −1 for 600 cycles). These metrics outperform almost all 2D c ‐MOF‐based electrodes, shedding light on new opportunities for energy storage devices.