通过多功能共价有机框架来储存高离子,用于可持续的电池
Mohammad K Shehab1, Hani M El-Kaderi1
1Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States.
ACS applied materials & interfaces
|March 18, 2024
概括
研究人员开发了一种新的与胺相关的共价有机框架 (BCOF-1),用于高效的离子储存. 这种先进的材料提供了高容量和快速充电传输,解决了可充电电池技术的局限性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可充电电池是离子电池的重要替代品,因为的供应有限.
- 高效的离子储存是一个重大挑战,阻碍了离子电池的发展.
- 共价有机框架 (COF) 正在成为储能应用的有希望的材料.
研究的目的:
- 设计和合成一种新的多功能二维共价有机框架,用于增强离子储存.
- 研究用于电池应用的合成材料的结构和电化学特性.
- 为了证明氧化还原活性COFs作为高效离子电池的可持续有机电极的潜力.
主要方法:
- 通过HATNHA和TA之间的凝结反应合成与胺相关的共价有机框架 (BCOF-1).
- 描述了BCOF-1结构,包括晶体堆叠和中孔通道形成.
- 评估离子储存的电化学性能,包括特定容量,能量密度和功率密度.
主要成果:
- BCOF-1 具有 392 mA hg-1 的高理论特异容量.
- 这种材料形成了具有高表面积 (840m2g-1) 的半孔六角道,促进了离子运动和电荷转移.
- BCOF-1表现出类似伪电容的行为,其特定容量为387 mA h g-1 ,能量密度为302 W h kg-1在0.1 C,功率密度为682 W kg-1在5 C.
结论:
- 氧化还原活性共价有机框架具有先进的离子储存所需的结构和电子特性.
- BCOF-1表现出色的性能,包括高容量和速率能力,使其成为有机电极的可行候选者.
- 这项研究强调了COF在开发可持续和高效的下一代可充电电池方面的潜力.
更多相关视频
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.0K
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
12.7K
相关概念视频
Ionic Bonding and Electron Transfer
41.5K
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.
41.5K
Ionic Bonds
118.4K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.4K
Ionic Compounds: Formulas and Nomenclature
66.9K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
66.9K
Ionic Crystal Structures
14.3K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.3K
Ion Exchange
591
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
591
Batteries and Fuel Cells
27.3K
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...
27.3K
