A Long Cycle Life, Self‐Healing Zinc–Iodine Flow Battery with High Power Density,Angewandte Chemie International Edition

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A Long Cycle Life, Self‐Healing Zinc–Iodine Flow Battery with High Power Density
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-05-14 , DOI: 10.1002/anie.201803122
Congxin Xie _{1,

2} , Huamin Zhang _{1,

3} , Wenbin Xu ₁ , Wei Wang ₄ , Xianfeng Li _{1,

3}

Affiliation

A zinc–iodine flow battery (ZIFB) with long cycle life, high energy, high power density, and self‐healing behavior is prepared. The long cycle life was achieved by employing a low‐cost porous polyolefin membrane and stable electrolytes. The pores in the membrane can be filled with a solution containing I₃⁻ that can react with zinc dendrite. Therefore, by consuming zinc dendrite, the battery can self‐recover from micro‐short‐circuiting resulting from overcharging. By using KI, ZnBr₂, and KCl as electrolytes and a high ion‐conductivity porous membrane, a very high power density can be achieved. As a result, a ZIFB exhibits an energy efficiency (EE) of 82 % at 80 mA cm⁻², which is 8 times higher than the currently reported ZIFBs. Furthermore, a stack with an output of 700 W was assembled and continuously run for more than 300 cycles. We believe this ZIFB can lead the way to development of new‐generation, high‐performance flow batteries.

中文翻译：

具有高功率密度的长寿命，自修复锌碘液流电池

准备了具有长寿命，高能量，高功率密度和自愈性能的锌碘液流电池（ZIFB）。通过使用低成本的多孔聚烯烃膜和稳定的电解质，可以实现较长的循环寿命。在膜中的孔可填充有包含I的溶液₃^-可与锌枝晶反应。因此，通过消耗树枝状的锌，电池可以从过度充电引起的微短路中自我恢复。通过使用KI，ZnBr ₂和KCl作为电解质和高离子电导率的多孔膜，可以实现非常高的功率密度。结果，ZIFB在80 mA cm ^-2时显示出82％的能效（EE），这是当前报告的ZIFB的8倍。此外，组装了输出功率为700 W的电池组，并连续运行了300多个循环。我们相信，这种ZIFB可以引领新一代高性能液流电池的开发。

更新日期：2018-05-14

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