强大的全芳合共有机框架,用于高性能和广泛的温度范围的阴极离子储存
Ben Yang1, Xu Deng2,3, Yan Wang4
1School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 19, 2025
概括
研究人员为先进的离子电池 (PIB) 阴极开发了强大的共价有机框架 (COF). 这些HATN-TAPT COF具有高容量,卓越的稳定性和广泛的温度适应性,适用于苛刻的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 为离子电池 (PIB) 阴极合成坚固且适应温度的共价有机框架 (COF) 提出了重大挑战.
- 现有的材料经常在循环和有限的操作温度范围内与体积变化作斗争.
研究的目的:
- 为先进的PIB阴极开发新的,强大的,具有丰富的氧化还原活性位点的全芳合COF.
- 评估PIB系统中合成的COF的电化学性能,结构稳定性和广泛的温度适应性.
主要方法:
- 在2,3,7,8-tetraaminophenazine-1,4,6,9-tetraone和hexaketocyclohexane octahydrate之间进行凝结反应,以合成HATN-TAPT COF.
- 使用合成的HATN-TAPT COF制造PIB阴极,并在优化的阻燃电解质中进行测试.
- 电化学性能评估包括容量,速率能力,循环稳定性和温度适应性测试.
主要成果:
- HATN-TAPT COF在0.1Ag-1下表现出前所未有的455mAhg-1的容量和860Whkg-1的能量密度.
- 实现了特殊的速率容量 (209 mAh g-1 在10.0 A g-1) 和功率密度 (18,900 W kg-1 阴极).
- 显著的循环稳定性,在5000个循环后以1.0 A g-1的235 mAh g-1和每周期0.0045%的低衰变率.
- 证明了广泛的温度适应性,从 -30 °C (355 mAh g-1) 到 60 °C (387 mAh g-1) 起作用.
结论:
- 合成的HATN-TAPT COF为强大而高性能的PIB阴极提供了一个有前途的解决方案.
- 该材料的多孔,灵活的结构和芳香结合结构有助于其优越的电化学性能和稳定性.
- 经过证明的全天候工作潜力使得这些COF非常适合在极端环境中的应用.
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