Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
Core Technology Research &Innovation Center, Hitachi Chemical, 2200, Oka, Fukaya-shi, Saitama 369-0297, Japan.
Nat Commun. 2016 Oct 21;7:13230. doi: 10.1038/ncomms13230.
The versatility in design of redox flow batteries makes them apt to efficiently store energy in large-scale applications at low cost. The discovery of inexpensive organic electroactive materials for use in aqueous flow battery electrolytes is highly attractive, but is thus far limited. Here we report on a flow battery using an aqueous electrolyte based on the sodium salt of flavin mononucleotide. Flavins are highly versatile electroactive molecules, which catalyse a multitude of redox reactions in biological systems. We use nicotinamide (vitamin B3) as a hydrotropic agent to enhance the water solubility of flavin mononucleotide. A redox flow battery using flavin mononucleotide negative and ferrocyanide positive electrolytes in strong base shows stable cycling performance, with over 99% capacity retention over the course of 100 cycles. We hypothesize that this is enabled due to the oxidized and reduced forms of FMN-Na being stabilized by resonance structures.
氧化还原流电池在设计上的多功能性使其能够以低成本在大规模应用中高效存储能量。因此，发现用于水性流电池电解质的廉价有机电活性材料是非常有吸引力的，但迄今为止受到限制。在这里，我们报告了一种使用基于黄素单核苷酸的钠盐的流电池。黄素是一种多功能电活性分子，在生物系统中催化多种氧化还原反应。我们使用烟酰胺（维生素 B3）作为助溶剂来提高黄素单核苷酸的水溶性。使用黄素单核苷酸作为负电解液，铁氰化钾作为正电解液，在强碱中组成的氧化还原流电池具有稳定的循环性能，在 100 个循环过程中容量保持率超过 99%。我们假设这是由于 FMN-Na 的氧化和还原形式被共振结构稳定化所实现的。
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