Volume 64, Issue 30 e202505207
Research Article

π-Bridge-Linked Ionic Covalent Organic Framework with Fast Reaction Kinetics for High-Rate-Capacity Lithium-Ion Batteries

Ju Duan

Ju Duan

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Both authors contributed equally to this work.

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Feng Chen

Feng Chen

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

Both authors contributed equally to this work.

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Huajie Yu

Huajie Yu

State Key Laboratory of Advanced Fiber Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620 China

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Shenbo Zhu

Shenbo Zhu

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Likuan Teng

Likuan Teng

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Kexiang Wang

Kexiang Wang

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Tiejun Chen

Tiejun Chen

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Prof. Wei Lyu

Corresponding Author

Prof. Wei Lyu

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

E-mail: [email protected]; [email protected]; [email protected]

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Prof. Huawei Hu

Corresponding Author

Prof. Huawei Hu

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

E-mail: [email protected]; [email protected]; [email protected]

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Prof. Yaozu Liao

Corresponding Author

Prof. Yaozu Liao

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 19 May 2025

Graphical Abstract

A new ionic quinoline-linked COF (iQCOF) was synthesized by combining π-bridge and charge-introduction strategy via a one-pot Povarov reaction. The π-bridge-linked ionic liquid endow iQCOF enhanced charge transfer ability, fast ionic atmosphere dissociation rate, and higher reaction rate. Thereby, it can be regarded as advanced COF-based cathodes with rapid kinetics to achieve high-rate performance and long-term stability.

Abstract

Covalent organic frameworks (COFs) have emerged as promising cathode materials for high-performance lithium-ion batteries (LIBs) due to their well-defined topologies and tunable pore architectures. However, their practical application is often limited by intrinsically sluggish charge transfer and inferior reaction kinetics. To address these challenges, we develop an ionic quinoline-linked COF (iQCOF) cathode via a one-pot Povarov reaction with triazole ionic liquid. The iQCOF architecture achieves a synergistic enhancement by integrating π-bridge-induced charge delocalization to facilitate charge transport, the specific adsorption effect to gain fast ionic atmosphere dissociation rate, and polar triazine units to enable uniform ion flux for stable interfaces. As a result, iQCOF delivers a high specific capacity of 407 mAh g−1 with 701 Wh kg−1, and exceptional rate capability (121 mAh g−1 at 10 A g−1) with 0.0027% per cycle over 10 000 cycles, further highlighting its potential as a high-performance organic cathode. This work provides a convenient strategy for advanced COF-based cathodes with fast reaction kinetics to achieve high-rate performance, paving the way for next-generation energy storage technologies.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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