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Updated: Jun 28, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
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Active Dendrite Suppression by Ferroelectric Membrane Separators in Rechargeable Batteries
Yutao Dong1, Wenjian Liu1, Corey Carlos1
1Department of Materials Science and Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States.
Nano Letters
|April 15, 2024
Summary
A novel ferroelectric polymer membrane completely eliminates dendrites in rechargeable batteries. This breakthrough enhances cycling stability and capacity, paving the way for safer, long-lasting batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Anodic dendrite formation is a major challenge in rechargeable batteries, causing instability and capacity fade.
- Current dendrite suppression methods offer kinetic control but do not prevent dendrite growth over time.
Purpose of the Study:
- To introduce a complete dendrite elimination strategy for rechargeable batteries.
- To investigate the use of a mesoporous ferroelectric polymer membrane as a battery separator for dendrite suppression.
Main Methods:
- Utilizing a mesoporous ferroelectric polymer membrane as a separator in battery cells.
- Investigating the piezoelectric polarization effect for reversing surface energetics during metal ion reduction.
- Demonstrating the strategy in zinc electroplating, Zn-Zn symmetric cells, and Zn-NaV3O8·1.5H2O full cells.
Main Results:
- Complete elimination of dendritic anode surfaces, resulting in featureless flat surfaces.
- Demonstrated effectiveness in zinc electroplating and various battery cell configurations.
- Achieved substantially longer charging/discharging cycles compared to conventional methods.
Conclusions:
- The ferroelectric polymer membrane offers a promising pathway for dendrite-free rechargeable batteries.
- The piezoelectric polarization mechanism provides a novel approach to control anode surface morphology.
- This strategy significantly improves battery cycling stability and lifespan.
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