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

Author:

Yin Jia‐Cheng1,Lian Xin1,Li Zhi‐Gang1,Cheng Mingren1,Liu Ming1,Xu Jian1,Li Wei1,Xu Yunhua2,Li Na13,Bu Xian‐He13ORCID

Affiliation:

1. School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule‐Based Material Chemistry Nankai University Tianjin 300350 China

2. School of Materials Science and Engineering Tianjin University Tianjin 300072 China

3. State Key Laboratory of Elemento‐Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China

Abstract

Abstract2D 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 Cu2+ ions to form an unprecedented 2D c‐MOF (Cu‐TAC) with functionality sites of efficient lithium storage. The synergistic effect of TAC and CuO4 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.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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