Progress and Perspective on Rechargeable Magnesium-Sulfur Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Rechargeable magnesium-sulfur (Mg-S) batteries are promising for next-generation energy storage due to high volumetric energy density, low cost, and safety.
• Practical implementation faces challenges in developing suitable electrolytes, efficient sulfur cathodes, and magnesium anodes.

Purpose of the Study:

• To provide a comprehensive overview of electrolyte design for reliable Mg-S batteries.
• To discuss Mg-S electrochemistry, cathode/anode strategies, and future research directions.

Main Methods:

• Review of electrolyte design principles for Mg-S batteries.
• Analysis of Mg-based salt construction (organomagnesium, inorganic, simple salts).
• Discussion of solvent selection and mitigation of Mg electrolyte corrosivity.

Main Results:

• Electrolyte design is crucial for Mg-S battery performance, focusing on salt construction, solvent choice, and stability.
• Understanding Mg-S electrochemistry and optimizing electrodes are essential for high-performance systems.
• Various strategies exist for improving Mg-based electrolytes and confronting their corrosivity.

Conclusions:

• Advanced electrolyte design is key to overcoming challenges in Mg-S battery development.
• Further research into Mg-based electrolytes, electrodes, and system integration is needed for practical applications.
• This review offers insights and perspectives for constructing high-performance, practical Mg-S batteries.