一个具有扩展结合的小分子有机阴极,用于增强Na+迁移动力学,用于先进的离子电池
Yuxin Yao1, Mengfai Pei1, Chang Su1
1School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province), Dalian University of Technology, Dalian, 116024, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 15, 2024
概括
这项研究引入了一种新的有机阴极材料,TDT,用于离子电池 (SIB). TDT提高了稳定性和速度性能,克服了SIB中有机化合物的常见限制.
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:
- 有机阴极材料为离子电池 (SIB) 提供了高的理论容量.
- 高溶解度和低导电性限制了它们的循环稳定性和速率性能.
研究的目的:
- 为SIBs开发一种稳定且高性能的有机阴极材料.
- 解决有机电极材料中可溶性和导电性的挑战.
主要方法:
- 合成一个扩展结合的有机小分子,2,3,7,8-tetraamino-5,10-dihydrophenazine-1,4,6,9-tetraone (TDT).
- 结构设计通过分子间凝结结合和皮佩拉津部分.
- 作为SIB中的阴极材料的TDT的电化学表征.
主要成果:
- 在500 mA g-1.1,TDT具有293 mAh g-1的高初始容量.
- 通过在70 A g-1.1下保持90 mAh g-1的异常速率能力.
- 完整电池 (TDT Asset Na-HC) 在100个循环中达到210 mAh g−1在500 mA g−1和120 mAh g−1在8 A g−1.1,达到210 mAh g−1.
结论:
- 设计的TDT分子有效地增强了分子间相互作用,降低了溶解度并提高了稳定性.
- 作为先进的离子电池的高容量和高速率有机阴极,TDT显示出显著的希望.
相关概念视频
03:12Batteries 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
01:17Ion 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
02:48Ionic 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
00:42Ionic Bonds
118.3K
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...
118.3K