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3D皇冠乙烯共价有机框架作为介相层,用于高性能金属电池

Shuang Zheng^1,2, Shuai Bi³, Yubin Fu^4,5

¹CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|February 10, 2024

概括

研究人员开发了一种基于3D皇冠以太的共价有机框架 (COF) 间相层,用于金属电池. 这种新的COF增强了沉积,并显著提高了电池寿命和效率.

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:

金属电池面临着岩形成和活跃消耗的挑战,这限制了它们的实际使用.
人工固体电解质介相 (SEI) 层,如二维共价有机框架 (COF),正在探索以减轻这些问题.
由于对3D COFs作为保护层的潜力未得到充分探索,因为人们担心树生长失调.

研究的目的:

为了研究基于3D皇冠以太的COF的有效性,使用ffc拓作为阳极的相间层.
为了解决人们对3D COFs可能会促进 lithium dendrite 乱生长的偏见.
探索定向皇冠以太单元对离子运输和沉积的影响.

主要方法:

基于皇冠以太的3DCOF的制造,皇冠以太单元的平行和垂直方向.
/COF-Cu电池的电化学表征,以评估性能指标.
分析离子扩散动力学和沉积行为与COF相间.

主要成果:

由于强大的皇冠乙醇-+合,3D COF 间相促进了均的 Li+ 流量和平滑的 Li 沉积在 3D 方向.
实现了0.85.8的高Li+转移数.
在340个周期中表现出较低的核化超电位 (17.4mV) 和高的平均库伦比效率 (≈98.6%).

结论:

3D共价有机框架可以有效地设计为金属阳极的保护性介相层.
3D COF中的定向皇冠以太单元促进了均的沉积,并增强了电池循环稳定性.
这项研究为在储能应用中设计先进的COF提供了新的视角.

关键词:

三维框架 3D框架共价有机框架是共价有机框架.皇冠以太币单位阶段间层是相间层.金属电池是金属电池的一种.

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