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

• 来源期刊: 能源化学
• 年，卷（期）: 2017,（4）
• 页码范围: 639-646
• 页数: 8页
• 语种: 英文
• DOI: 10.1016/j.jechem.2017.04.013

摘要

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 mW/cm2) and practical energy density (232.6Wh/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 mA/cm2 after continuously running for more than 1000 cycles,which is by far the longest cycle life reported for non-aqueous flow batteries.