Multiple Redox-Active Centers in An Azatriangulenetrione-Based Covalent Organic Framework for High-Capacity, High-Rate and Ultra-Stable Sodium-Ion Batteries

Fangyuan Kang; Lei Yan; Zihao Chen; Yuchan Zhang; Qianfeng Gu; Jinglun Yang; Shen Xu; Xiang Wang; Chun-Sing Lee; Yonggang Wang; Qichun Zhang

doi:10.1002/anie.202417779

Multiple Redox-Active Centers in An Azatriangulenetrione-Based Covalent Organic Framework for High-Capacity, High-Rate and Ultra-Stable Sodium-Ion Batteries

Angew Chem Int Ed Engl. 2024 Nov 24:e202417779. doi: 10.1002/anie.202417779. Online ahead of print.

Authors

Fangyuan Kang¹, Lei Yan^{1

2}, Zihao Chen¹, Yuchan Zhang¹, Qianfeng Gu¹, Jinglun Yang¹, Shen Xu¹, Xiang Wang¹, Chun-Sing Lee³, Yonggang Wang⁴, Qichun Zhang^{1

3}

Affiliations

¹ Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue 83, Kowloon, 999077, Hong Kong SAR, P. R. China.
² School of Materials Science and Chemical Engineering, Ningbo University, 315211, Ningbo, Zhejiang, P. R. China.
³ Department of Chemistry, Center of Super-Diamond and Advanced Films (COSDAF) &, Hong Kong Institute of Clean Energy (HKICE), City University of Hong Kong, 999077, Hong Kong SAR, P. R. China.
⁴ Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, 200433, Shanghai, P. R. China.

PMID: 39582263
DOI: 10.1002/anie.202417779

Abstract

Sodium-ion batteries (SIBs) suffer from sluggish kinetics, large volume change, and limited specific capacity due to the large radius of Na⁺. These issues can be solved through using covalent organic frameworks (COFs) as electrodes. Herein, an azatriangulenetrione-containing COF (denoted as CityU-33) was designed and synthesized as an electrode material for SIBs. Due to its inherent abundance of multiple redox-active sites and fast intercalation kinetics, CityU-33 delivered a high discharge capacity of 410.4 mAh g^-1 at 0.1 A g^-1 and showed remarkable long-term cycling stability, where a discharge capacity of 288 mAh g^-1 at 0.2 A g^-1 with 97 % retention over 2000 cycles was achieved, making it the top COF electrode material for SIBs.

Keywords: Anode; Azatriangulenetrione; Covalent organic frameworks (COFs); Energy storage; Sodium-ion batteries (SIBs).

Abstract

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