AI Article Synopsis
- Zinc dendrite growth impairs zinc-bromine flow battery (ZBB) performance by damaging membranes and causing self-discharge.
- By replacing traditional polymer mesh with a titanium-based mesh interlayer in ZBBs, more active sites for the redox reaction are created, leading to better flow channels and reduced dendrite growth.
- This modification significantly enhances energy efficiency—38.5% increase at 40 mA/cm and 14.7% at 80 mA/cm—while minimizing maintenance needs related to refreshing the battery.
Article Abstract
Zinc dendrite growth negatively affects zinc-bromine flow battery (ZBB) performance by causing membrane damage, inducing self-discharge. Herein, in a ZBB, a conventional polymer mesh was replaced with a titanium-based mesh interlayer; this provided additional abundant active sites for the Zn/Zn redox reaction and well-developed electrolyte flow channels, which resulted in improved reaction kinetics and suppressed Zn dendrite growth. Compared with a ZBB cell comprising a conventional polymer mesh and a carbon-based electrode, the ZBB cell using the titanium mesh interlayer and a carbon-based electrode showed significantly reduced frequency of the refreshing process, which occurs at regular cycling intervals during practical use for removing residual zinc dendrites in ZBB; also, the average energy efficiency at a current density of 40 mA cm increased by 38.5%. Moreover, the modified ZBB cell exhibited higher energy efficiency at a high current density of 80 mA cm, which is an improvement of 14.7% than in case of the contemporary polymer mesh. Consequently, this study can provide helpful insights for new anode side structures including spacer mesh for developing high-performance ZBBs.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7904783 | PMC |
| http://dx.doi.org/10.1038/s41598-021-83347-1 | DOI Listing |
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