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Updated: Sep 21, 2025
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Mesoporous Polyimide-Linked Covalent Organic Framework with Multiple Redox-Active Sites for High-Performance Cathodic
Xiya Yang1, Lei Gong1, Xiaolin Liu1
1Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China.
New covalent organic frameworks (COFs) offer high capacity for Li-ion batteries. This novel polyimide-linked COF material demonstrates excellent stability and ion transport, achieving high active site utilization for improved performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Covalent organic frameworks (COFs) are emerging as promising renewable cathode materials for lithium-ion batteries.
- Current COF electrodes face limitations in capacity due to low active site density and poor utilization.
- Developing COFs with enhanced electrochemical properties is crucial for advancing battery technology.
Purpose of the Study:
- To design and synthesize a novel two-dimensional polyimide-linked COF (HATN-AQ-COF) with multiple redox-active sites for Li+ ion storage.
- To investigate the electrochemical performance of HATN-AQ-COF as a cathode material for Li-ion batteries.
- To enhance the capacity and active site utilization of COF-based electrodes.
Main Methods:
- Fabrication of HATN-AQ-COF using 2,3,8,9,14,15-hexacarboxyl hexaazatrinaphthalene trianhydrides and a 2,6-diaminoanthraquinone linker.
- Characterization of HATN-AQ-COF for stability, conductivity, and pore size (3.8 nm).
- Electrochemical testing of HATN-AQ-COF as a Li-ion battery cathode material at 0.5 C.
Main Results:
- HATN-AQ-COF exhibits excellent stability, good conductivity, and a large pore size facilitating fast ion transport.
- The fabricated COF achieved a high reversible capacity of 319 mAh/g at 0.5 C.
- Demonstrated high active site utilization (89%) and good cycle performance, outperforming previously reported COF electrodes.
Conclusions:
- The novel HATN-AQ-COF material significantly improves capacity and active site utilization in Li-ion battery cathodes.
- Its structural and electronic properties enable stable and efficient Li+ ion storage.
- This work presents a new benchmark for COF-based cathode materials in energy storage applications.
