Chang, Zhenjun Henkensmeier, Dirk Chen, Ruiyong 2024-01-20T01:02:02Z 2024-01-20T01:02:02Z 2021-09-04 2017-08 1864-5631 https://pubs.kist.re.kr/handle/201004/122493 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. English WILEY-V C H VERLAG GMBH One-Step Cationic Grafting of 4-Hydroxy-TEMPO and its Application in a Hybrid Redox Flow Battery with a Crosslinked PBI Membrane Article 10.1002/cssc.201701060 1 CHEMSUSCHEM, v.10, no.16, pp.3193 - 3197 CHEMSUSCHEM 10 16 3193 3197 N scie scopus 000408193000004 2-s2.0-85026754462 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article RESEARCH-AND-DEVELOPMENT PROGRESS anion-exchange membrane electrolyte energy storage polybenzimidazole redox flow batteries