Extremely Stable Anthraquinone Negolytes Synthesized from Common Precursors
Extremely Stable Anthraquinone Negolytes Synthesized from Common Precursors
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DOI：
10.1016/j.chempr.2020.03.021
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发表时间：
2020-06-11
期刊：
影响因子：
23.5
通讯作者：
Aziz, Michael J.
中科院分区：
文献类型：
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作者：
Wu, Min;Jing, Yan;Aziz, Michael J.
合成成本和长期稳定性仍然是在氧化还原液流电池中利用氧化还原活性有机分子进行电网规模储能的两个最具挑战性的障碍。从潜在廉价的9,10-二氢蒽开始，我们开发了一种新的合成方法来合成两种极其稳定的蒽醌电解液，即3,3'-(9,10-蒽醌-二基)双(3-甲基丁酸)(DPivOHAQ)和4,4'-(9,10-蒽醌-二基)二丁酸(DBAQ)。与 pH 12 的亚铁氰化物正电解质配对，DPivOHAQ 和 DBAQ 可以传输多达 1.4 和 2 M 电子，容量衰减率分别为每天 0.014% 和 0.0084% 每天，并表现出 1.0 V 的开路电压。通过将支持电解质调节至 pH 14，DPivOHAQ 表现出创纪录的低容量衰减率
Synthetic cost and long-term stability remain two of the most challenging barriers for the utilization of redox-active organic molecules in redox flow batteries for grid-scale energy storage. Starting from potentially inexpensive 9,10-dihydroanthracene, we developed a new synthetic approach for two extremely stable anthraquinone negolytes, i.e., 3,3'-(9,10-anthraquinone-diyl)bis(3-methylbutanoic acid) (DPivOHAQ) and 4,4'-(9,10-anthraquinone-diyl)dibutanoic acid (DBAQ). Pairing with a ferrocyanide posolyte at pH 12, DPivOHAQ and DBAQ can transfer up to 1.4 and 2 M electrons with capacity fade rates of 0.014% per day and 0.0084% per day, respectively, and exhibit 1.0 V of open-circuit voltage. By adjusting the supporting electrolytes to pH 14, DPivOHAQ exhibited a record low capacity fade rate of