Early View e202510604
Forschungsartikel

Robust Imidazole-Linked 2D Covalent Organic Frameworks for Efficient Electrochemical Sodium-Ion Storage

Yuzhao Guo

Yuzhao Guo

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 China

Both authors contributed equally to this work.

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Prof. Linqi Cheng

Prof. Linqi Cheng

Key Laboratory of polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

Both authors contributed equally to this work.

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Xupeng Zhang

Xupeng Zhang

Key Laboratory of polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Meiling Qi

Meiling Qi

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 China

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Yabo Wei

Yabo Wei

School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418 China

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Prof. Sheng Han

Corresponding Author

Prof. Sheng Han

School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418 China

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

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Xi Su

Xi Su

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 China

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Prof. Heng-Guo Wang

Corresponding Author

Prof. Heng-Guo Wang

Key Laboratory of polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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

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Long Chen

Corresponding Author

Long Chen

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 China

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

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First published: 09 July 2025

Abstract

Exploring stable and functional linkages through facile one-pot cyclocondensation reactions represents one of the frontiers in the development of covalent organic frameworks (COFs), which can enhance structural robustness and diversity while broadening their application potential. In this study, we report a facile synthetic strategy using p-toluenesulfonic acid (PTSA) as a proton mediator to construct two imidazole-linked COFs (TABQ-COF and TAPT-COF) via one-pot cyclocondensation of aromatic aldehydes with ortho-diamines. These two COFs not only possess good crystallinity but also exhibit excellent physicochemical stability and contain abundant redox-active sites, which endows them with charming advantages for electrochemical energy storage. Remarkably, when employed as an anode material for sodium-ion batteries (SIBs), TAPT-COF delivered a reversible capacity of 517 mAh g−1 at 0.05 A g−1 while maintaining outstanding cycling stability with minimal capacity degradation (<0.035% per cycle) over 1000 cycles at 1.0 A g−1. This superior performance stems from synergistic contributions of abundant redox-active centers (C═O and C═N groups), which enable efficient Na+ storage through multielectron redox mechanisms. This study highlights the strategic advantage of structurally stable COFs with precisely engineered redox-active motifs via facile synthesis for advancing high-performance electrochemical energy storage.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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