Molecular Damping Effect of Trace Additives Enhances Zinc Anode Stability Under High Depth of Discharge

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

Resolving the severe issues such as electric field distortion, dendritic zinc growth, and uneven zinc deposition under high depths of discharge (DOD) has become a significant hurdle of the aqueous zinc-ion batteries (ZIBs). To address these challenges, an interfacial regulation strategy is proposed based on the molecular damping effect, in which a trace amount of weakly adsorbing additive is employed to stabilize the Zn anode interface by mitigating energy shocks and ionic disturbances induced by electric field fluctuations. Trace perfluorinated PSVE (erfluoro-3,6-dioxa-4-methyloct-7-enesulphonyl fluoride) is introduced to the traditional ZnSO4 electrolyte to optimize Zn deposition behavior on the zinc anode. Thus, the Zn//Zn symmetric batteries exhibit a prolonged cycling lifespan of over 200 h, even when operated at a high DOD of 85.5%. Additionally, the NVO (Na2V6O16) cathodes coupled with Zn anodes and modified electrolyte present a more stable capacity retention, maintaining a capacity of 141.98 mAh g−1 after 1000 cycles. Similarly, the full batteries assembled with the same electrodes in a ZnSO4 electrolyte retain only 51.49 mAh g−1 capacity after the same conditions. This work highlights the potential of the molecular damping effect as a promising solution for improving high DOD performance in ZIBs.

Details

Original languageEnglish
Article numbere07071
JournalAdvanced science
Volume12
Issue number37
Early online date28 Jul 2025
Publication statusPublished - 6 Oct 2025
Peer-reviewedYes

External IDs

PubMed 40720161

Keywords

Keywords

  • aqueous zinc-ion batteries, high depth of discharge, molecular damping effect, PSVE, trace additive