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A High-Performance Quasi-Solid-State Aqueous Zinc-Dual Halogen Battery.
Shuyao Lv1, Timing Fang1, Zhezheng Ding1
1School of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong266071, Shandong, P. R. China.
ACS Nano
|December 13, 2022
Summary
This study introduces a quasi-solid-state aqueous zinc-dual halogen battery. The novel design enhances energy storage capacity and density for grid applications.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Aqueous zinc-based batteries offer safe, eco-friendly, and cost-effective grid-scale energy storage.
- Low capacity and energy density currently limit the practical application of these batteries.
Purpose of the Study:
- To develop an advanced aqueous zinc-dual halogen battery with improved energy storage performance.
- To enable multiple redox reactions for enhanced electrochemical activity.
Main Methods:
- Fabrication of a quasi-solid-state battery using a freestanding carbon cloth-iodine cathode and a concentrated aqueous gel electrolyte.
- Utilizing dual halogen chemistry (iodine and bromide) for successive redox reactions.
- Incorporating LiNO3 additive and acrylamide-based polymer matrix for interface stabilization and side reaction suppression.
Main Results:
- The battery design activates three successive redox reactions: I-/I0, I0/I+, and Br-/Br0.
- The interhalogen [IBr2]- facilitates enhanced conversion reactions.
- The stabilized anode/electrolyte interface and suppressed active species dissolution contribute to high performance.
Conclusions:
- The developed aqueous dual halogen battery chemistry significantly boosts capacity and energy density.
- This technology presents a promising advancement for grid-scale energy storage solutions.
- The quasi-solid-state design enhances stability and performance of aqueous zinc batteries.
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