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Chemically Generated Liquid Sulfur Droplets at Room and Subzero Temperatures.
Pragadeesh Subramaniam-Venkatesh1, Zhi Gao1, Hongchang Hao2
1Department of Mechanical Engineering, Oakland University, Rochester, Michigan 48309, United States.
ACS Nano
|August 7, 2025
Summary
Researchers created liquid sulfur at room and subzero temperatures using chemical reactions, overcoming electrode limitations for advanced battery development. This breakthrough enables new possibilities for high-energy lithium-sulfur batteries.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Liquid sulfur formation is typically electrode-dependent via electrochemical polysulfide oxidation.
- This electrode-dependency limits the application of liquid sulfur in battery technologies.
- Developing substrate-independent methods for liquid sulfur generation is crucial for advancing battery performance.
Purpose of the Study:
- To introduce a novel chemical approach for generating liquid sulfur.
- To achieve liquid sulfur formation at room and subzero temperatures, independent of electrode materials.
- To explore new avenues for enhancing lithium-sulfur and other metal-sulfur battery systems.
Main Methods:
- Utilizing a redox mediator to chemically oxidize polysulfides.
- Generating liquid sulfur droplets in the electrolyte away from the electrode surface.
- Conducting experiments at ambient and subzero temperatures (-15 °C).
Main Results:
- Successfully generated liquid sulfur through substrate-independent chemical reactions.
- Achieved liquid sulfur formation at temperatures significantly below its melting point (115 °C).
- Demonstrated liquid sulfur generation at -15 °C.
Conclusions:
- A novel chemical pathway for liquid sulfur generation has been established.
- This method overcomes the limitations of electrode-dependent electrochemical processes.
- The chemically generated liquid sulfur offers potential for developing next-generation high-energy metal-sulfur batteries.
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