Robust Imidazole‐Linked 2D Covalent Organic Frameworks for Efficient Electrochemical Sodium‐Ion Storage
Abstract
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.
Article Details
Authors (9)
Yuzhao Guo
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry Jilin University Changchun China
Linqi Cheng
Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
Xupeng Zhang
Meiling Qi
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry Jilin University Changchun 130012 China
Yabo Wei
School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 China
Sheng Han
Academy for Advanced Interdisciplinary Studies, Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, College of Outstanding Engineers
Xi Su
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry
Heng‐Guo Wang
Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education and Faculty of Chemistry Northeast Normal University Changchun People's Republic of China
Long Chen
Department of Chemistry, Frontiers Science Center for New Organic Matter and State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry