Non-aqueous lithium bromine battery of high energy density with carbon coated membrane

Flow batteries with high energy density and long cycle life have been pursued to advance the progress of energy storage and grid application. Non-aqueous batteries with wide voltage windows represent a promising technology without the limitation of water electrolysis, but they suffer from low electr...

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Bibliographic Details
Published in:Journal of energy chemistry 2017-07, Vol.26 (4), p.639-646
Main Authors: Xi, Xiaoli, Li, Xianfeng, Wang, Chenhui, Lai, Qinzhi, Cheng, Yuanhui, Xu, Pengcheng, Zhang, Huamin
Format: Article
Language:English
Subjects:
Battery
Bromine
Energy-storage
Lithium
Non-aqueous
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Summary:Flow batteries with high energy density and long cycle life have been pursued to advance the progress of energy storage and grid application. Non-aqueous batteries with wide voltage windows represent a promising technology without the limitation of water electrolysis, but they suffer from low electrolyte concentration and unsatisfactory battery performance. Here, a non-aqueous lithium bromine rechargeable battery is proposed, which is based on Br2/Br-and Li+/Li as active redox pairs, with fast redox kinetics and good stability. The Li/Br battery combines the advantages of high output voltage（3.1 V）,electrolyte concentration（3.0 mol/L）, maximum power density（29.1 m W/cm2） and practical energy density（232.6 Wh/kg）. Additionally, the battery displays a columbic efficiency（CE） of 90.0%, a voltage efficiency（VE） of 88.0% and an energy efficiency（EE） of 80.0% at 1.0 m A/cm2 after continuously running for more than 1000 cycles, which is by far the longest cycle life reported for non-aqueous flow batteries.
ISSN:2095-4956
DOI:10.1016/j.jechem.2017.04.013