Biomimetic Amino Acid Functionalized Phenazine Flow Batteries with Long Lifetime at Near‐Neutral pH
作者:Shuai Pang、Xinyi Wang、Pan Wang、Yunlong Ji
DOI:10.1002/anie.202014610
日期:2021.3
Aqueous organic redox flow batteries (AORFBs) are a promising electrochemical technology for large‐scale energy storage. We report a biomimetic, ultra‐stable AORFB utilizing an amino acid functionalized phenazine (AFP). A series of AFPs with various commercial amino acids at different substituted positions were synthesized and studied. 1,6‐AFPs display much higher stability during cycling when compared
水性有机氧化还原液流电池(AORFB)是一种用于大规模储能的有前途的电化学技术。我们报告了一种利用氨基酸官能化的吩嗪(AFP)的仿生,超稳定AORFB。合成并研究了一系列在不同取代位置具有各种商业氨基酸的AFP。与2,7和1,8-AFP相比,1,6-AFP在循环期间显示出更高的稳定性。机理研究表明,还原的2,7-和1,8-AFP倾向于互变异构,并失去其可逆的氧化还原活性,而1,6-AFP在氧化态和还原态下均具有超高稳定性。通过配对3,3'-(吩嗪-1,6-二基双(氮杂二基))二丙酸(1,6- DPAP),在pH值为8的亚铁氰化物中,电子浓度为1.0 M,该液流电池的OCV为1.15 V,每年的容量衰减率极低,为0.5%。这些结果表明,氧化还原活性有机物分子工程对于坚固的氧化还原液流电池的重要性。