一个高度坚固和导电的超微孔3D Fe (II) 基金属有机框架,用于高效的能量存储
Soumen Khan1,2, Santanu Chand3, Pandiyan Sivasakthi1
1Department of Chemistry, Birla Institute of Technology & Science (BITS) Pilani, Hyderabad Campus Jawaharnagar, Samirpet, Hyderabad, Telangana, 500078, India.
Small (Weinheim an der Bergstrasse, Germany)
|April 4, 2024
概括
一种基于铁的新金属有机框架 (Fe-MET) 为先进的电化学电容器提供了特殊的稳定性和导电性. 这种材料表现出卓越的储能性能,性能优于许多现有替代品.
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:
- 金属有机框架 (MOF) 对储能具有前景,但往往由于化学稳定性差和电导率低而受到损害.
- 开发强大且导电的MOF电极对于推进电化学电容器 (EC) 技术至关重要.
研究的目的:
- 合成和描述一种具有增强稳定性和导电性的新型3D超微孔三酸Fe-MOF (Fe-MET).
- 评估Fe-MET作为电化学电容器的活性电极材料的性能.
主要方法:
- 使用具有成本效益和商业可用的前体合成Fe-MET.
- 评估Fe-MET在广泛的pH范围 (1-14) 和各种有机溶剂中的化学稳定性.
- 测量Fe-MET的电导率.
- 用于EC的Fe-MET电极的制造和电化学测试,包括电容和循环稳定性测量.
主要成果:
- 在各种化学环境 (pH 1-14) 和有机溶剂中,Fe-MET表现出了显著的稳定性.
- 该材料表现出高电导率 (0.19 S m-1).
- Fe-MET电极在0.5 A g-1下提供出色的重力度 (304 F g-1) 和面积 (181 mF cm-2) 电容,具有出色的循环稳定性.
- 在固态设备中作为唯一电极材料使用的Fe-MET超过了许多报告的基于MOF的EC,多孔碳和石墨烯材料.
结论:
- 开发的Fe-MET材料解决了能源存储应用中MOF的关键局限性.
- 作为电化学电容器的高性能电极材料,Fe-MET显示出显著的潜力.
- 其稳定性,导电性和电化学性能的独特组合使其成为传统储能材料的有希望的替代品.
相关概念视频
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
02:58Crystal Field Theory - Octahedral Complexes
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...