双金属有机框架的电化学性能和机制,用于高级水性离子电池

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Updated: Jul 15, 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

Heng Lv¹, Jiali Wang¹, Xinyu Gao¹

¹Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003 Xinjiang, China.

ACS applied materials & interfaces

|September 28, 2023

概括

水性电池 (AZIB) 由于其高容量和安全性而具有前景. 研究人员开发了一种新的金属有机框架 (MOF) 阴极,ZnMn-Squaric acid (ZnMn-SQ),证明了AZIBs的出色性能和长周期寿命.

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
储能储能储能储能储能储能

背景情况:

水性电池 (AZIB) 正因其高理论容量,低氧化还原潜力和增强的安全性而引起人们的兴趣.
开发高性能阴极对于推进AZIB技术至关重要.
金属有机框架 (MOF) 提供可调节的结构,为AZIB应用提供了显著的潜力.

研究的目的:

合成和评估一种新的MOF材料,即ZnMn-Squaric酸 (ZnMn-SQ),作为AZIBs的阴极.
研究 ZnMn-SQ 阴极的电化学性能和长期稳定性.
探索电池循环期间阴极的结构演变.

主要方法:

ZnMn-Squaric 酸 (ZnMn-SQ) 的共同沉合成.
作为AZIB中的阴极,对ZnMn-SQ进行电化学测试,包括容量,速率能力和循环寿命测量.
使用X射线衍射 (XRD),X射线光电子光谱 (XPS) 和富里埃变换红外光谱 (FT-IR) 分析结构变化的现场表征.

主要成果:

ZnMn-SQ电极在0.2 A g-1下表现出高容量489.1 mA hg-1的高容量.
实现了卓越的长周期寿命,在1300个循环后保持了80.7 mA hg-1 .
结构分析显示,在循环过程中,从最初的MOF框架转化为氧化和其他化合物.
一个完整的AZIB装置使用修改后的阳极和ZnMn-SQ阴极,在660个循环后,在1Ag-1下达到171.3mAhg-1的容量.

结论:

Mn-酸 (ZnMn-SQ) 是高性能水性离子电池的一个有前途的阴极材料.
该研究阐明了在MOF基阴极循环过程中发生的复杂结构转换.
这项工作突出了MOF化合物的潜力,用于开发先进的储能解决方案.

关键词:

阳极是一种极.水性离子电池水性离子电池阴极阴极是指一个阴极.电化学复氧机制的电化学复氧机制金属-有机的框架.

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