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A High-Energy Aqueous All-Sulfur Battery
Huimin Wang1, Songshan Bi1, Yanyu Zhang1
1Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education), Renewable Energy Conversion and Storage Center, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Angewandte Chemie (International Ed. in English)
|January 18, 2024
Summary
Researchers developed a high-energy aqueous all-sulfur battery using novel sulfur/metal sulfide redox couples. This breakthrough enhances energy density for safer, lower-cost rechargeable batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Rechargeable aqueous batteries offer safety and low cost but suffer from low energy densities.
- Limited capacities of traditional ion-inserted electrode materials hinder widespread adoption.
- Developing high-energy aqueous systems is crucial for advancing energy storage solutions.
Purpose of the Study:
- To construct a high-energy aqueous all-sulfur battery.
- To overcome the limitations of low energy density in conventional aqueous batteries.
- To explore novel redox couples for enhanced electrochemical performance.
Main Methods:
- Designed an aqueous all-sulfur battery by integrating S/Cu2S and S/CaSx redox couples.
- Utilized conversion reactions in both cathode and anode materials.
- Incorporated simultaneous redox of Cu2+ ion charge carriers for increased electron transfer.
Main Results:
- Achieved a high discharge capacity of 447 mAh g−1 (based on total sulfur mass) at 0.1 A g−1.
- Attained an enhanced energy density of 393 Wh kg−1.
- Demonstrated a two-electron transfer mechanism, effectively doubling cathode capacity.
Conclusions:
- The novel aqueous all-sulfur battery design significantly boosts energy density.
- Simultaneous redox reactions and conversion chemistry are key to high performance.
- This approach broadens possibilities for designing advanced high-energy aqueous batteries.
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