One-step synthesis of dual-ligand 2D conductive metal-organic framework for high-performance lithium storage

• Published in: Science China materials 2023-12, Vol.66 (12), p.4566-4574
• Main Authors: Yin, Jia-Cheng, Zhang, Yin-Qiang, Li, Zhi-Gang, Cheng, Mingren, Liu, Ming, Li, Wei, Li, Na, Bu, Xian-He
• Format: Article
• Language: English
• Subjects: Anodes; Benzene; Benzoquinone; Chemistry and Materials Science; Chemistry/Food Science; Electrode materials; Electrodes; Ethylenediamine; Ligands; Lithium-ion batteries; Materials Science; Metal-organic frameworks; Rechargeable batteries; Stability; Synthesis
• ISSN: 2095-8226; 2199-4501
• DOI: 10.1007/s40843-023-2626-0

Two-dimensional conductive metal-organic frameworks (2D c-MOFs) are emerging as promising electrode materials for lithium-ion batteries (LIBs). However, 2D c-MOFs with binary redox-active organic ligands are rare and suffer from complicated synthesis procedures. Herein, a facile one-step method is developed for the synthesis of a dual-ligand-based 2D c-MOF Cu 3 (HHTP)(THQ) (HHTP = 2,3,6,7,10,11-hexahydroxytriphenyl, THQ = tetrahydroxy-1,4-benzoquinone) by using the ethylenediamine regulator. The resulting Cu 3 (HHTP)(THQ) possesses good conductivity, abundant active sites, and excellent chemical stability. As an anode material for LIBs, Cu 3 (HHTP)(THQ) exhibits high specific capacity, good rate performance, and long-term cycling stability. Comprehensive experimental studies and theoretical calculations reveal that CuO 4 units and aromatic benzene rings in Cu 3 (HHTP)(THQ) are involved in lithium storage, thereby optimizing the lithium storage performance. This work provides a new way for the construction of dual-ligand 2D c-MOFs and high-performance LIB electrode materials.