Redox flow battery (RFB) is a promising electrochemical energy storage technology which is suitable for the storage of intermittent energy such as solar and wind energy. The most remarkable advantage of RFBs is their independent tunability of energy storage and power delivery. Nonaqueous organic RFBs can reach a high potential without the limitation of the electrochemical window of water, and lower the cost by using cheap but effective materials. However, organic flow battery has not yet been mature and few appropriate organic active species can be applied in practice so far.<br/>Heterocyclic aromatics, including furan, thiophene, thiazole, pyridine and their condensed rings, have similar properties to aromatics, which can delocalize electrons and stabilize the neural species as well as radical cations and radical anions, so they are regarded as promising active species. The introduction of heteroatoms, especially O, N, S, which have high electronegativity, will improve the stability of the system. In this work, substituent groups are introduced to the heteroatoms and benzene rings via nucleophilic or electrophilic attack through organic synthesis methods. The redox potential, solubility and stability of active species are tuned with both electron donating groups and electron withdrawing groups, which can functionalize the molecules and improve the performance of RFBs.

Selection and optiSelection and optimization of stable heterocyclic aromatics for nonaqueous redox flow battery

2019 Spring National Meeting

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