A Long-Lifetime All-Organic Aqueous Flow Battery Utilizing TMAP-TEMPO Radical
By Yahua Liu, M. Goulet, Liuchuan Tong, Yazhi Liu, Yunlong Ji, Liang Wu, R. Gordon, M. Aziz, Zhengjin Yang, Tongwen Xu. Chem, 2019
247 citations recorded by the source corpus.
Summary The massive-scale integration of renewable electricity into the power grid is impeded by its intrinsic intermittency. The aqueous organic redox flow battery (AORFB) rises as a potential storage solution; however, the choice of positive electrolytes is limited, and the aqueous-soluble organic positive redox-active species reported to date have short lifetimes. Here we report a stable organic molecule for the positive terminal, 4-[3-(trimethylammonio)propoxy]-2,2,6,6-tetramethylpiperidine-1-oxyl (TMAP-TEMPO) chloride, exhibiting high (4.62 M) aqueous solubility. When operated in a practical AORFB against a negative electrolyte comprising BTMAP-viologen at neutral pH, the flow cell displayed an open-circuit voltage of 1.1 volts and a Coulombic efficiency of >99.73%. The capacity retention rate is among the highest of all-organic AORFBs reported to date, at 99.993% per cycle over 1,000 consecutive cycles; the temporal capacity fade rate of 0.026% per h is independent of concentration.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/55c715ecc9fb0329de6f94610a193b49a0c10700
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In Electrical and Electronic Engineering
Citations in the corpus
- Redox flow batteries: Status and perspective towards sustainable stationary energy storage (2021, methodology): “Recently, Aziz and Yang [115] reported a BTMAP-Vi/TMAP-TEMPO AORFB.”