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A dopamine-based high redox potential catholyte for aqueous organic redox flow battery | |
Liu, Quanbing; Li, Xiangrong; Yan, Chuanwei; Tang, Ao | |
2020-06-01 | |
Source Publication | JOURNAL OF POWER SOURCES
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Volume | 460 |
Abstract | Organic redox flow batteries with many technological advantages over conventional metal-based flow batteries represent a new generation flow battery technology for electric grid storage applications. Herein, we report a dopamine-based catholyte with a high redox potential of 0.77 V for aqueous organic redox flow batteries. In sulfuric acid, the dopamine exhibits an excellent combination of good electrochemical reversibility and high solubility up to 0.7 M, and undergoes a fast two-electron transfer redox reaction with a rate constant of 1.82 x 10(-3) cm s(-1). Paired with V3+/V2+, the dopamine-vanadium full cell delivers an average round-trip efficiency of 65% at 20 mA cm(-2) and achieves a capacity retention of 50% for 100 consecutive charge-discharge cycles. Moreover, an energy efficiency of 51.3% can be steadily realized at an increased current density of 60 mA cm(-2), while an enhanced capacity retention over extended 200 charge-discharge cycles is also observed by introducing saturated ammonium chloride into sulfuric acid. The proposed dopamine-based catholyte not only successfully offers a new alternative for aqueous organic redox flow batteries, but its performance can be also further promoted by rational molecule design and optimizations in mass transfer and electrode kinetics. |
DOI | 10.1016/j.jpowsour.2020.228124 |
WOS ID | WOS:000528272200015 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.imr.ac.cn/handle/321006/82815 |
Collection | 中国科学院金属研究所 |
Recommended Citation GB/T 7714 | Liu, Quanbing,Li, Xiangrong,Yan, Chuanwei,et al. A dopamine-based high redox potential catholyte for aqueous organic redox flow battery[J]. JOURNAL OF POWER SOURCES,2020,460. |
APA | Liu, Quanbing,Li, Xiangrong,Yan, Chuanwei,&Tang, Ao.(2020).A dopamine-based high redox potential catholyte for aqueous organic redox flow battery.JOURNAL OF POWER SOURCES,460. |
MLA | Liu, Quanbing,et al."A dopamine-based high redox potential catholyte for aqueous organic redox flow battery".JOURNAL OF POWER SOURCES 460(2020). |
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