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Updated: Jul 26, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
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Colloid Electrolyte with Weakly Solvated Structure and Optimized Electrode/Electrolyte Interface for Zinc Metal
Bin Hu1, Yang Wang1, Xiaohu Qian1
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China.
ACS Nano
|June 16, 2023
Summary
Researchers developed a novel electrolyte additive using upconversion nanocrystals for aqueous zinc batteries. This innovation significantly enhances zinc anode stability, suppressing dendrite growth and enabling longer battery life for sustainable energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Aqueous zinc batteries offer a sustainable energy storage solution but suffer from zinc anode instability.
- Dendrite growth and parasitic reactions limit the performance and lifespan of zinc metal anodes.
Purpose of the Study:
- To design a bifunctional colloidal electrolyte additive for aqueous zinc batteries.
- To inhibit dendrite growth and parasitic reactions at the zinc anode.
Main Methods:
- Utilized NaErF4@NaYF4 upconversion nanocrystals as a solid electrolyte additive.
- Employed experimental characterization and molecular dynamics simulations.
- Investigated the formation of an electrostatic shielding layer and ZnF2-enriched interface.
Main Results:
- The additive enabled sustained release of functional ions, improving zinc anode reversibility.
- Modified Zn2+ solvation environment and constructed a protective interface.
- Achieved stable zinc plating/stripping for over 2100 hours in symmetric cells.
- Demonstrated stable cycling for 1600 cycles in Zn||MnO2 full cells.
Conclusions:
- The bifunctional colloidal electrolyte additive effectively suppresses dendrite growth and parasitic reactions.
- This approach significantly enhances the long-term stability and performance of aqueous zinc batteries.
- The study highlights the potential of multifunctional electrolyte additives for advanced energy storage.
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