Aggregation of Electrochemically Active Conjugated Organic Molecules and Its Impact on Aqueous Organic Redox Flow Batteries

被引：51
作者：
Xiang, Zhipeng [1 ]
Li, Wenjin [1 ]
Wan, Kai [1 ]
Fu, Zhiyong [1 ]
Liang, Zhenxing [1 ]
机构：
[1] South China Univ Technol, Sch Chem & Chem Engn, Guangdong Prov Key Lab Fuel Cell Technol, Guangzhou 510641, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Aggregation-Regulated Electrochemistry; Methyl Viologen; Redox Flow Battery; Ultramicroelectrode; CATION; CAPACITY; REDUCTION; ANOLYTE; DIMER; ION;
D O I：
10.1002/anie.202214601
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Molecule aggregation in solution is acknowledged to be universal and can regulate the molecule's physiochemical properties, which however has been rarely investigated in electrochemistry. Herein, an electrochemical method is developed to quantitatively study the aggregation behavior of the target molecule methyl viologen dichloride. It is found that the oxidation state dicationic ions stay discrete, while the singly-reduced state monoradicals yield a concentration-dependent aggregation behavior. As a result, the molecule's energy level and its redox potential can be effectively regulated. This work does not only provide a method to investigate the molecular aggregation, but also demonstrates the feasibility to tune redox flow battery's performance by regulating the aggregation behavior.
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页数：6
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