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Stable Zinc Metal Battery Development: Using Fibrous Zirconia for Rapid Surface Conduction of Zinc Ions With Modified Water Solvation Structure. | LitMetric

AI Article Synopsis

Article Abstract

The two most critical technical issues in Zn-based batteries, dendrite formation, and hydrogen evolution reaction, can be simultaneously addressed by introducing negatively charged fibrous ZrO as a separator. Electron redistribution between ZrO and Zn ions renders the ZrO surface a preferred adsorption site for Zn ions, making surface conduction the primary ion-transport mode. Surface conduction enables fibrous ZrO to exhibit a 6.54 times higher single-Zn-ion conductivity than that of conventional glass fiber, minimizing the concentration gradient of Zn and suppressing dendrite formation. Additionally, strong Zr─O─Zn bonding stabilizes the Zn ions with fewer solvated HO molecules (≈2), preventing water molecules from approaching the electrode surface, as evidenced by a 58.8% decrease in the hydrogen evolution rate. Consequently, the cycling stability of a fibrous-ZrO-based Zn/Zn symmetric cell (3000 h at 1 mAh cm and 5 mA cm) is approximately ten times greater than that of the conventional variant. Furthermore, a fibrous-ZrO-based Zn-I full cell exhibits a notably high energy density (271.4 Wh kg) as well as a long lifespan (≈5000 cycles) at an ultrahigh current density (4 A g).

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Source
http://dx.doi.org/10.1002/smll.202406481DOI Listing

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