Yuan Zhizhang, Duan Yinqi, Liu Tao, Zhang Huamin, Li Xianfeng
Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.
Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China; Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian 116023, P. R. China.
iScience. 2018 May 25;3:40-49. doi: 10.1016/j.isci.2018.04.006. Epub 2018 Apr 12.
Alkaline zinc-iron flow battery is a promising technology for electrochemical energy storage. In this study, we present a high-performance alkaline zinc-iron flow battery in combination with a self-made, low-cost membrane with high mechanical stability and a 3D porous carbon felt electrode. The membrane could provide high hydroxyl ion conductivity while resisting zinc dendrites well owing to its high mechanical stability. The 3D porous carbon felt could serve as a guidance for the zinc stripping/plating, which can effectively suppress zinc dendrite/accumulation as well. Thus this battery demonstrates a coulombic efficiency of 99.5% and an energy efficiency of 82.8% at 160 mA cm, which is the highest value among recently reported flow battery systems. The battery can stably run for more than 500 cycles, showing very good stability. Most importantly, the practicability of this battery is confirmed by assembling a kilowatt cell stack with capital cost under $90/kWh.
碱性锌铁液流电池是一种很有前景的电化学储能技术。在本研究中，我们展示了一种高性能碱性锌铁液流电池，它结合了自制的、具有高机械稳定性的低成本膜和三维多孔碳毡电极。该膜由于具有高机械稳定性，能够提供高氢氧根离子传导率，同时能很好地抵抗锌枝晶。三维多孔碳毡可为锌的剥离/电镀提供导向，也能有效抑制锌枝晶/堆积。因此，该电池在160 mA/cm²时的库仑效率为99.5%，能量效率为82.8%，这是最近报道的液流电池系统中的最高值。该电池可稳定运行500多个循环，显示出非常好的稳定性。最重要的是，通过组装成本低于90美元/千瓦时的千瓦级电池堆，证实了该电池的实用性。
