AI Article Synopsis
- A deep eutectic solvent (DES) is a low-cost, easily prepared electrolyte that can be used in zinc-bromine batteries (ZBBs), which improves battery performance.
- The study reports a Zn-halide-based DES electrolyte that prevents evaporation and improves ion mobility, leading to better electrode reaction kinetics.
- This optimized DES electrolyte significantly enhances the battery's rate capability and extends its cycle life, making it suitable for flexible applications like wearable electronics.
Article Abstract
A deep eutectic solvent (DES) is an ionic liquid-analog electrolyte, newly emerging due to its low cost, easy preparation, and tunable properties. Herein, a zinc-bromine battery (ZBB) with a Zn-halide-based DES electrolyte prepared by mixing ZnBr , ZnCl , and a bromine-capturing agent is reported. The water-free DES electrolyte allows a closed-cell configuration for the ZBB owing to the prevention of Br evaporation and H evolution. It is found that the Cl anion changes the structure of the zinc-halide complex anions and demonstrated that it improves the ion mobility and electrode reaction kinetics. The DES electrolyte with the optimized ZnCl composition shows much higher rate capability and a cycle life 90 times longer than that of a ZnCl -free DES electrolyte. A pouch-type flexible ZBB battery based on the DES electrolyte exhibits swelling-free operation for more than 120 cycles and stable operation under a folding test, suggesting its potential in consumer applications such as wearable electronics.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9798974 | PMC |
| http://dx.doi.org/10.1002/advs.202204908 | DOI Listing |
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