Shifting redox potential of nitroxyl radical by introducing an imidazolium substituent and its use in aqueous flow batteries

被引：58

作者：

Chang, Zhenjun ^{[1
,2
,3
]}

Henkensmeier, Dirk ^{[4
,5
,6
]}

Chen, Ruiyong ^{[2
,3
]}

机构：

[1] JUST, Coll Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[2] Saarland Univ, Transferctr Sustainable Electrochem, D-66123 Saarbrucken, Germany

[3] KIST Europe, D-66123 Saarbrucken, Germany

[4] KIST, Fuel Cell Res Ctr, Seoul 02792, South Korea

[5] Univ Sci & Technol, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea

[6] Korea Univ, Green Sch, Seoul 02841, South Korea

来源：

JOURNAL OF POWER SOURCES | 2019年 / 418卷

关键词：

Redox flow battery; Energy storage; 4-hydroxy-TEMPO; Redox-active organic molecule; Imidazolium grafting; IONIC LIQUID; HIGH-CAPACITY; HIGH-VOLTAGE; ELECTROLYTES; EFFICIENT; DENSITY; SURFACE; POINT; PH;

D O I：

10.1016/j.jpowsour.2019.02.028

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Imidazolium-grafted nitroxyl radical is synthesized through a simple two-step reaction route, and studied as redox-active catholyte for redox flow batteries. A discharge cell voltage of 1.64 V against a Zn2+/Zn anodic couple in aqueous electrolyte has been achieved. Compared to the commercial 4-OH-TEMPO and previous work, the excellent chemical and electrochemical stability of the newly synthesized compound has been confirmed from the enhanced and steady Coulombic efficiency over charge/discharge cycling. Moreover, stable cycling efficiencies and good capacity retention over long-term cycling have been observed.

引用

收藏

页码：11 / 16

页数：6

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