Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7740878 | Journal of Power Sources | 2013 | 7 Pages |
Abstract
Low power density (operated current density) is one critical obstacle to the development of single flow zinc-nickel batteries (ZNBs). Three-dimensional porous nickel foams (NFs) are first introduced to ZNBs to improve power density. The relationship between utilized electrode area, potential distribution and operated current density has been studied. A high coulombic efficiency (97.3%) and energy efficiency (80.1%) are obtained at 80Â mAÂ cmâ2 over 200 cycles, which is the highest value ever reported for ZNBs. The power density is improved nearly fourfold to 83Â WÂ kgâ1. The results indicate that three-dimensional porous electrodes are more suitable as negative electrodes for ZNBs under high operated current densities. This provides an effective way to improve power density of ZNBs and will arouse a new revolution in the development of flow batteries.
Related Topics
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Authors
Yuanhui Cheng, Huamin Zhang, Qinzhi Lai, Xianfeng Li, Dingqin Shi, Liqun Zhang,