用于高容量、高倍率和超稳定钠离子电池的氮杂环戊烯三酮共价有机框架中的多个氧化还原活性中心。

IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2024-11-24 DOI:10.1002/anie.202417779

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

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引用次数: 0

摘要

钠离子电池（SIB）因 Na+ 半径大而存在动力学缓慢、体积变化大和比容量有限等问题。使用共价有机框架（COF）作为电极可以解决这些问题。在此，我们设计并合成了一种含氮三芳基四酮的 COF（代号为 CityU-33）作为 SIB 的电极材料。由于 CityU-33 本身具有丰富的多个氧化还原活性位点和快速插层动力学，它在 0.1 A g-1 条件下可实现 410.4 mAh g-1 的高放电容量，并表现出显著的长期循环稳定性，在 0.2 A g-1 条件下可实现 313 mAh g-1 的放电容量，且在 1700 次循环中保持约 100% 的放电容量，使其成为 SIB 的顶级 COF 电极材料。

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

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.

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.