兴奋剂诱导激活离子电池的共价有机框架阴极
Guoying Ren1, Fengshi Cai1, Shoucheng Wang1
1Tianjin Key Lab for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology Tianjin 300384 China caifs@tjut.edu.cn.
RSC advances
|June 26, 2023
概括
本研究介绍了辅助的共价有机框架 (COF) 作为离子电池 (LIB) 的先进阴极材料. 这些COF表现出增强的导电性和可访问性,导致卓越的性能和稳定性.
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
- 纳米技术纳米技术
背景情况:
- 联有机框架 (COF) 由于其高容量和有序结构,显示出作为离子电池 (LIB) 的有机电极材料的潜力.
- 对COF电极性能的主要限制包括低导电性和无法访问的活性点.
研究的目的:
- 为LIBs开发高性能COF电极材料.
- 通过改善离子/电子传输和活性站点可访问性来提高COF的电化学性能.
主要方法:
- 通过一溶解热反应合成化β-胺相关的COF (COF-I).
- 对COF-I特性进行表征,重点关注电性和运输特性.
- 在LIBs中对COF-I作为阴极材料进行电化学测试.
主要成果:
- COF-I在0.2 A g-1.1时显示出高初始放电容量140 mA h g-1 在0.2 A g-1.1时.
- 观察到卓越的循环稳定性,在1000个循环后92%的容量保留.
- 在300个循环后,在1.0A g-1下维持了95mA hg-1的可逆容量.
结论:
- 兴奋剂显著增强了COF中的内在离子/电子运输和活性部位的可访问性.
- 开发的COF-I材料为高性能LIB电极材料提供了一个简单的途径.
- 这项工作为推进基于COF的储能解决方案提出了一个有前途的战略.
相关概念视频
Crystal Field Theory - Octahedral Complexes
26.9K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.9K
Ionic Bonding and Electron Transfer
41.8K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
41.8K
Metal-Ligand Bonds
21.1K
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...
21.1K


