A Heteroanionic Zinc Ion Conductor for Dendrite-Free Zn Metal Anodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36813539.
- Also identified by DOI 10.1002/adma.202300195.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Although zinc-based batteries are promising candidates for eco-friendly and cost-effective energy storage devices, their performance is severely retarded by dendrite formation. As the simplest zinc compounds, zinc chalcogenides, and halides are individually applied as a Zn protection layer due to high zinc ion conductivity. However, the mixed-anion compounds are not studied, which constrains the Zn<sup>2+</sup> diffusion in single-anion lattices to their own limits. A heteroanionic zinc ion conductor (Zn<sub>y</sub> O<sub>1-</sub> <sub>x</sub> F<sub>x</sub> ) coating layer is designed by in situ growth method with tunable F content and thickness. Strengthened by F aliovalent doping, the Zn<sup>2+</sup> conductivity is enhanced within the wurtzite motif for rapid lattice Zn migration. Zn<sub>y</sub> O<sub>1-</sub> <sub>x</sub> F<sub>x</sub> also affords zincophilic sites for oriented superficial Zn plating to suppress dendrite growth. Therefore, Zn<sub>y</sub> O<sub>1-</sub> <sub>x</sub> F<sub>x</sub> -coated anode exhibits a low overpotential of 20.4 mV for 1000 h cycle life at a plating capacity of 1.0 mA h cm<sup>-2</sup> during symmetrical cell test. The MnO<sub>2</sub> //Zn full battery further proves high stability of 169.7 mA h g<sup>-1</sup> for 1000 cycles. This work may enlighten the mixed-anion tuning for high-performance Zn-based energy storage devices.