One-Step Cationic Grafting of 4-Hydroxy-TEMPO and its Application in a Hybrid Redox Flow Battery with a Crosslinked PBI Membrane

被引：76

作者：

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

Henkensmeier, Dirk ^{[4
,5
]}

Chen, Ruiyong ^{[1
,2
]}

机构：

[1] Saarland Univ, Transferctr Sustainable Electrochem, D-66125 Saarbrucken, Germany

[2] KIST Europe, Campus E7 1, D-66123 Saarbrucken, Germany

[3] Jiangsu Univ Sci & Technol, Coll Mat Sci & Engn, Zhenjiang 212003, Peoples R China

[4] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea

[5] Univ Sci & Technol, ET GT, Seoul 02792, South Korea

来源：

CHEMSUSCHEM | 2017年 / 10卷 / 16期

关键词：

anion-exchange membrane; electrolyte; energy storage; polybenzimidazole; redox flow batteries; RESEARCH-AND-DEVELOPMENT; PROGRESS;

D O I：

10.1002/cssc.201701060

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

By using a one-step epoxide ring-opening reaction between 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl (4-hydroxy-TEMPO) and glycidyltrimethylammonium cation (GTMA(+)), we synthesized a cation-grafted TEMPO (g(+)-TEMPO) and studied its electrochemical performance against a Zn2+/Zn anode in a hybrid redox flow battery. To conduct Cl- counter anions, a crosslinked methylated polybenzimidazole (PBI) membrane was prepared and placed between the catholyte and anolyte. Compared to 4-hydroxy-TEMPO, the positively charged g(+)-TEMPO exhibits enhanced reaction kinetics. Moreover, flow battery tests with g(+)-TEMPO show improved Coulombic, voltage, and energy efficiencies and cycling stability over 140 cycles. Crossover of active species through the membrane was not detected.

引用

页码：3193 / 3197

页数：5

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