通过引入多个键,MOF电极具有增强的结构稳定性
Feng Liu1,2, Pingwei Ye2, Qiang Cheng1
1School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China.
在金属有机框架 (MOF) 中引入四重键可以增强结构稳定性和能量储存的自我愈合特性. 这一创新提高了超级电容器的性能和循环寿命.
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) 显示出储能潜力,但由于协调纽带较弱,结构稳定性较差.
- 提高MOF的内在稳定性对于其在储能设备中的实际应用至关重要.
研究的目的:
- 提高结构稳定性,并引入用于储能应用的MOF的自我修复能力.
- 研究四重键对MOF稳定性和性能的影响.
主要方法:
- 将四重键纳入MOF结构,以创建交叉连接的网络.
- 制造一种自我愈合的混合材料 (SHH-Cu-MOF@Ti3C2Tx) 和一种控制材料 (H-Cu-MOF@Ti3C2Tx).
- 使用SHH-Cu-MOF@Ti3C2Tx和活性炭 (AC) 电极组装一个不对称的超级电容器 (ASC).
主要成果:
- 与对照组 (79.9%) 相比,SHH-Cu-MOF@Ti3C2Tx表现出优异的电容保留 (89.4%在5000个循环后).
- 动态键提供了自我愈合的能力,并在压力下保护了MOF结构.
- 制造的ASC在1Ag-1时达到47.4Fg-1的特定电容,能量密度为16.9Wh kg-1和功率密度为800W kg-1.
结论:
- 四重键显著提高了用于储能的MOF的结构稳定性和循环性能.
- 这种自我愈合的混合材料显示出开发耐用和高性能超级电容器的潜力.
- 开发的非对称超级电容器表现出有前途的能量和功率密度特征.
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
10:45Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
相关概念视频
Hydrogen Bonds
Resonance and Hybrid Structures
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Introduction to Chemical Bonds
The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms. The innermost electron shell has a maximum capacity of two electrons, but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states that, with the exception of the innermost shell, atoms are most stable energetically when they have eight electrons in their valence shell, the...
Lewis Structures of Molecular Compounds and Polyatomic Ions
Complexation Equilibria: Factors Influencing Stability of Complexes
Molecular Shape and Polarity
