| Autor: |
Ai, Yan, Yang, Chaochao, Yin, Ziqing, Wang, Tong, Gai, Tianyu, Feng, Jiayou, Li, Kailin, Zhang, Wei, Li, Yefei, Wang, Fei, Chao, Dongliang, Wang, Yonggang, Zhao, Dongyuan, Li, Wei |
| Zdroj: |
Journal of the American Chemical Society; June 2024, Vol. 146 Issue: 22 p15496-15505, 10p |
| Abstrakt: |
The practical application of aqueous zinc-ion batteries (AZIBs) is greatly challenged by rampant dendrites and pestilent side reactions resulting from an unstable Zn–electrolyte interphase. Herein, we report the construction of a reliable superstructured solid electrolyte interphase for stable Zn anodes by using mesoporous polydopamine (2D-mPDA) platelets as building blocks. The interphase shows a biomimetic nacre’s “brick-and-mortar” structure and artificial transmembrane channels of hexagonally ordered mesopores in the plane, overcoming the mechanical robustness and ionic conductivity trade-off. Experimental results and simulations reveal that the −OH and −NH groups on the surface of artificial ion channels can promote rapid desolvation kinetics and serve as an ion sieve to homogenize the Zn2+flux, thus inhibiting side reactions and ensuring uniform Zn deposition without dendrites. The 2D-mPDA@Zn electrode achieves an ultralow nucleation potential of 35 mV and maintains a Coulombic efficiency of 99.8% over 1500 cycles at 5 mA cm–2. Moreover, the symmetric battery exhibits a prolonged lifespan of over 580 h at a high current density of 20 mA cm–2. This biomimetic superstructured interphase also demonstrates the high feasibility in Zn//VO2full cells and paves a new route for rechargeable aqueous metal-ion batteries. |
| Databáze: |
Supplemental Index |
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