相关实验视频

Updated: Sep 16, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

作为高效的阳极,聚二基诺二胺相关的共价有机框架具有高性能和广泛的温度适应性

Fangyuan Kang¹, Lei Yan^1,2, Yongjie Cao³

¹Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR 999077, P. R. China.

Journal of the American Chemical Society

|July 11, 2025

概括

一个新的共价有机框架,CityU-36,为离子电池 (SIB) 提供了高容量和耐用性. 这种材料在广泛的温度范围内表现出卓越的性能,使其适用于实际的,全天候的储能解决方案.

科学领域:

材料科学
电化学
能量储存

背景情况:

离子电池 (SIB) 是未来电气化的离子电池的有希望的替代品.
对于SIB来说,关键的挑战包括实现高容量,耐用性,速率性能和耐温性.
共价有机框架 (COF) 提供可调节的结构和性能,用于先进的储能应用.

研究的目的:

开发一种用于高性能离子电池阳极的新型COF材料 (CityU-36).
评估城市U-36的电化学性能,重点关注容量,速率能力和长期循环使用性.
调查使用CityU-36的SIB的广泛温度可操作性和实用性.

主要方法:

通过对2,3,5,6-四氨基基 (TABQ) 和4,4',4" - - 1,3,5-二,4,6-三) (TFPT) 的聚凝合成与多联的COF (CityU-36).
作为SIB中的阳极的CityU-36的电化学测试,包括静电充放电循环,速率能力测试和长期循环稳定性测量.
在40°C至60°C的广泛温度范围内进行性能评估.

主要成果:

城市U-36的超高可逆容量为552mAhg-1在0.1Ag-1.
在2900个循环中观察到369mAhg-1在8.0Ag-1和546mAhg-1在5Ag-1.
该装置在40°C (321 mAh g−1 @0.03 A g−1) 和60°C (357 mAh g−1 @10 A g−1) 的温度下表现出了显著的适应性.

结论:

一种新的COFCityU-36显示出作为离子电池的高性能阳极材料的巨大潜力.
材料的坚固结构,高容量和广泛的温度可操作性解决了SIB发展的关键挑战.
城市U-36是一个有希望的实用,全天候离子储能解决方案.

更多相关视频

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

相关概念视频

Ionic Crystal Structures

Ionic Crystal Structures

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...

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO₂ Mechanism

Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.