作为高性能金属电池的指导层的-双乙烯单位的反氧活性共价有机框架
Si-Wen Ke1, Yaoda Wang1, Jian Su1,2
1State Key Laboratory of Coordination Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
Journal of the American Chemical Society
|April 29, 2022
概括
新的共价有机框架 (COFs) 结合了金属有机框架 (MOFs) 的特性,可以提高金属电池的性能. 这些先进的材料促进了高能量密度系统的均沉积和稳定循环.
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 共价有机框架 (COF) 和金属有机框架 (MOF) 是具有调节性质的高级多孔材料.
- 跨越MOF和COF为具有增强功能的新材料设计提供了机会.
- 金属电池 (LMB) 需要稳定的阳极来实现高能量密度.
研究的目的:
- 综合和描述结合MOF和COF特征的新型COF.
- 研究这些新材料作为金属阳极中介层的潜力.
- 评估它们对电沉积和电池性能的影响.
主要方法:
- 合成Ni-bis (乙烯) 甲连接剂.
- 两个COF (Ni-TAP和Ni-TAA) 的构建使用imine键.
- 包括表面积,导电性和化学稳定性在内的COF特性.
- 作为金属电池中介层的应用测试.
主要成果:
- 两种新型COF,Ni-TAP和Ni-TAA,已成功合成,具有不同的网络拓 (sql和ffc).
- 这两种COF表现出高的Brunauer-Emmett-Teller表面积 (324和689平方米) 和良好的导电性.
- 作为中间层,Ni-TAP和Ni-TAA表现出极好的性和离子导电性.
- 实现了带有柱状形态的均沉积和稳定的涂/剥离,从而提高了的利用率.
结论:
- 合成的COF代表了MOF和COF之间的有希望的桥梁,提供了增强的化能力.
- 这些材料有效地引导均的电沉积,减轻LMB中的树突形成.
- 开发的COF显示了升级用于高能量密度电池应用的金属阳极的巨大潜力.
更多相关视频
相关概念视频
03:12Batteries and Fuel Cells
28.1K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
28.1K
02:51Metal-Ligand Bonds
21.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.6K