用于高容量、高倍率和超稳定钠离子电池的基于氮杂三角烯三酮的共价有机框架中的多个氧化还原活性中心
Multiple Redox-Active Centers in An Azatriangulenetrione-Based Covalent Organic Framework for High-Capacity, High-Rate and Ultra-Stable Sodium-Ion Batteries.
作者信息
Kang Fangyuan, Yan Lei, Chen Zihao, Zhang Yuchan, Gu Qianfeng, Yang Jinglun, Xu Shen, Wang Xiang, Lee Chun-Sing, Wang Yonggang, Zhang Qichun
机构信息
Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue 83, Kowloon, 999077, Hong Kong SAR, P. R. China.
School of Materials Science and Chemical Engineering, Ningbo University, 315211, Ningbo, Zhejiang, P. R. China.
出版信息
Angew Chem Int Ed Engl. 2025 Feb 3;64(6):e202417779. doi: 10.1002/anie.202417779. Epub 2024 Dec 2.
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 at 0.1 A g and showed remarkable long-term cycling stability, where a discharge capacity of 288 mAh g at 0.2 A g with 97 % retention over 2000 cycles was achieved, making it the top COF electrode material for SIBs.
钠离子电池（SIBs）由于Na半径较大，存在动力学迟缓、体积变化大以及比容量有限等问题。通过使用共价有机框架（COFs）作为电极，可以解决这些问题。在此，设计并合成了一种含氮杂三角烯三酮的COF（记为CityU-33）作为SIBs的电极材料。由于其固有的多个氧化还原活性位点以及快速的嵌入动力学，CityU-33在0.1 A g下具有410.4 mAh g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下实现了288 mAh g的放电容量，在2000次循环中保持率为97%，使其成为SIBs的顶级COF电极材料。
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