Molecular Damping Effect of Trace Additives Enhances Zinc Anode Stability Under High Depth of Discharge
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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 language | English |
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| Article number | e07071 |
| Journal | Advanced science |
| Volume | 12 |
| Issue number | 37 |
| Early online date | 28 Jul 2025 |
| Publication status | Published - 6 Oct 2025 |
| Peer-reviewed | Yes |
External IDs
| PubMed | 40720161 |
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Keywords
ASJC Scopus subject areas
Keywords
- aqueous zinc-ion batteries, high depth of discharge, molecular damping effect, PSVE, trace additive