由基于盐的π-联框架聚合物实现的14电子氧化学,增强了高性能离子储存
Xinlu Zhang1, Seyedeh Alieh Kazemi2, Xingtao Xu3
1Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, China.
Small (Weinheim an der Bergstrasse, Germany)
|March 26, 2024
概括
这项研究引入了一种用于先进离子电池 (LIB) 的新型氧化还原活性框架聚合物. 该材料表现出异常的容量和稳定性,为下一代储能解决方案铺平了道路.
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
- 聚合物化学 聚合物化学
背景情况:
- 用于储能的有机材料受到有限的氧化还原中心,电荷运输不良和不稳定的影响.
- 这些局限性阻碍了它们在离子电池 (LIB) 等设备中的实际应用.
研究的目的:
- 为LIBs开发一种稳定,有氧还原活性有机材料,具有增强的电荷传输能力.
- 为了解决现有的有机电极材料的局限性.
主要方法:
- 一种基于salen的氧化还原活性框架聚合物 (RSFP) 的合成,具有 π 结合的配置.
- 外置X射线光电子光谱 (XPS) 用于分析结构演变.
- 密度函数理论 (DFT) 计算以了解离子结合相互作用.
主要成果:
- 在168个循环后,RSFP在0.05 A g-1下实现了671.8 mAh g-1的卓越可逆容量.
- 在2Ag-1.1.1下3500个循环后,具有946.2mAhg-1可逆容量的特殊性能.
- XPS揭示了活跃的CN,C─O和CO位点,电化学触发CO提高了性能.
结论:
- 开发的RSFP克服了有机材料用于储能的关键限制.
- 该材料显示了LIB应用程序的显著容量保留和稳定性.
- 这项研究为设计高性能氧化还原活性有机电极材料提供了新的途径.
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