Breakthrough in Aqueous Zinc-Sulfur Batteries Offers Cost and Safety Advantages

Strategic Insights -

Researchers from Northeastern University have made significant advancements in the development of aqueous zinc-sulfur batteries (AZSBs) by introducing a cosolvent, diethylformamide (DEF), in the ZnSO4 electrolyte. This innovation facilitates the sulfur cathode conversion reaction, leading to faster charge transfer kinetics and improved electrical conductivity. The study, published in the Journal of the American Chemical Society, presents design principles for cosolvent electrolytes in AZSBs and demonstrates the potential for elevated discharge plateaus and reduced cell polarization.

Key Takeaways:

  • The researchers introduced a cosolvent, diethylformamide (DEF), in the ZnSO4 electrolyte to facilitate the sulfur cathode conversion reaction, resulting in faster charge transfer kinetics and improved electrical conductivity.
  • The cosolvent electrolyte design achieved an elevated discharge plateau of 0.8 V vs Zn/Zn and reduced cell polarization of 0.32 V, outperforming most reported AZSBs.
  • Machine learning results suggest that the donor number and HOMO energy of the cosolvents are critical descriptors for predicting the discharge voltage of AZSBs.
  • The study presents design principles for cosolvent electrolytes in AZSBs, offering new insights into the development of high-performance AZSBs.
  • The research was conducted by a team of researchers from Northeastern University, led by Ya Sai, with contributions from Peng Hei, Lin Yu, Yulai Lin, Bo Li, Guangxu Hu, Wanlong Wu, Jing Wang, Xiaoqi Sun, Xiao-Xia Liu, and Yu Song.

Statistics:

  • The discharge plateau of 0.8 V vs Zn/Zn is an elevated voltage compared to most reported AZSBs.
  • The cell polarization of 0.32 V is significantly reduced compared to industry standards.
  • The HOMO-LUMO gap of 0.74 eV is narrower than the 1.31 eV reported for Zn(HO), leading to faster charge transfer kinetics.
  • The study presents machine learning results indicating that the donor number and HOMO energy of the cosolvents are critical descriptors for predicting the discharge voltage of AZSBs.

Sources:

  • VerticalNews, "New Research on Electronics is the Subject of a Report" (2025)
  • Journal of the American Chemical Society, "Cosolvent Electrolyte Design for High-Voltage Aqueous Zinc-Sulfur Batteries" (2025)
  • American Chemical Society, "Journal of the American Chemical Society" (2025)
  • NewsRx LLC, "Northeastern University Reports Findings in Electronics (Cosolvent Electrolyte Design for High-Voltage Aqueous Zinc-Sulfur Batteries)" (2025)