Reversible Energy Storage in Layered Copper-Based Coordination Polymers: Unveiling the Influence of the Ligand's Functional Group on Their Electrochemical Properties
Reversible Energy Storage in Layered Copper-Based Coordination Polymers: Unveiling the Influence of the Ligand's Functional Group on Their Electrochemical Properties
复制标题
层状铜基配位聚合物中的可逆储能：揭示配体官能团对其电化学性能的影响
DOI：
10.1021/acs.jpcc.0c01486
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发表时间：
2020
期刊：
影响因子：
3.7
通讯作者：
H. Nishihara
中科院分区：
文献类型：
--
作者：
M. Amores;K. Wada;K. Sakaushi;H. Nishihara
配位聚合物是研究材料中氧化还原机制的合适模型，其中金属阳离子和配体都经历电化学反应，并且能够通过可逆的多电子转移过程进行，阳离子和阴离子插入到它们的开放结构中。设计用于电化学储能的新型配位聚合物并改善继电器性能也是基于对它们的结构-性能关系的理解。在这里，我们提出了一个家庭的铜基配位聚合物与六官能化的苯配体形成kagome型层状结构，其中的功能基团在其结构和电化学性能的影响进行了研究。通过粉末X射线衍射（PXRD）、傅里叶变换红外光谱（FTIR）和拉曼光谱（Raman）研究了它们的化学和结构性质，然后通过循环伏安法和恒电流循环技术研究了它们在Li半电池中的电化学性能。和飞行时间二次离子质谱测量循环电极已经进行了深入了解这些铜基配位聚合物作为正极材料的氧化还原机制。
Coordination polymers represent a suitable model for studying redox mechanisms in materials where both metal cations and ligands undergo electrochemical reactions and are capable of proceeding through reversible multielectron-transfer processes with the insertion of cations and anions into their open structures. Designing new coordination polymers for electrochemical energy storage with improved performance relays also on the understanding of their structure–property relationship. Here, we present a family of copper-based coordination polymer with hexafunctionalized benzene ligands forming a kagome-type layered structure, where the influence of the functional groups in their structure and electrochemical properties is investigated. Their chemical and structural properties have been explored by means of powder X-ray diffraction (PXRD) and Fourier-transform infrared and Raman spectroscopies, followed by investigation of their electrochemical performance in Li half-cells by cyclic voltammetry and galvanostatic cycling techniques.Ex situPXRD, Raman, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry measurements of cycled electrodes have been carried out to provide insights into the redox mechanism of these copper-based coordination polymers as positive electrode materials.