Breakthrough in Zinc-Ion Battery Technology: Scientists Develop "Smart" Electrolyte Additives

Strategic Insights -

Scientists at Northeast Normal University in China have made a significant discovery in zinc-ion battery technology, developing "smart" electrolyte additives that can autonomously regulate the electrolyte structure and protect the zinc anodes. The new additives, called fluorinated and nitrogen-doped carbonized polymer dots (FNCPDs), interact with zinc and water molecules to modify the zinc solvation structure, suppress water activity, and mitigate water-induced side reactions. These advanced additives have been shown to significantly improve the performance and lifespan of zinc-ion batteries.

Key Takeaways:

  • The researchers developed a novel kind of smart fluorinated and nitrogen-doped carbonized polymer dots (FNCPDs) as multifunctional additives for zinc-ion batteries (ZIBs).
  • FNCPDs interact with Zn and water molecules through coordination and hydrogen bonding, modifying the Zn solvation structure and suppressing water activity.
  • The co-deposited FNCPDs form a dynamic protective layer, mitigating water-induced side reactions and inducing Zn plating along the (002) plane during Zn plating.
  • FNCPDs can detach from the Zn anode during stripping, continuing to regulate solvate Zn and limit water activity, and promoting a thin solid electrolyte interphase (SEI) formation and suppressing dendrite growth during cycling.
  • The Zn||MnO full cell with FNCPDs electrolyte maintains a high discharge capacity of 164.12 mAh g after 1200 cycles, with a capacity retention of approximately 85.65 %.
  • The researchers highlighted the significant potential of environmentally friendly, low-cost carbon dots for application in the field of energy storage.
  • This research has been peer-reviewed and published in the Journal of Colloid and Interface Science.

Statistics:

  • 164.12 mAh g discharge capacity maintained by the Zn||MnO full cell with FNCPDs electrolyte after 1200 cycles.
  • 85.65 % capacity retention of the Zn||MnO full cell with FNCPDs electrolyte after 1200 cycles.
  • 1200 cycles of Zn plating and stripping were conducted to test the performance of the FnCPDs additives.
  • The researchers noted that the use of FNCPDs additives resulted in a significant improvement in the performance and lifespan of zinc-ion batteries.

Sources:

  • Carbonized polymer dots with intelligent recognition and dynamic protection for highly stable Zn-ion batteries. Journal of Colloid and Interface Science, 2025;700:138499.
  • Elsevier - www.elsevier.com
  • Journal of Colloid and Interface Science - www.journals.elsevier.com/journal-of-colloid-and-interface-science/
  • Northeast Normal University, Key Laboratory of Sustained and Advanced Functional Materials, College of Chemistry.