Tailoring Zn²⁺ Flux by an Ion Acceleration Layer Modified Separator for High-Rate Long-Lasting Zn Metal Anodes.

ABSTRACT: A large concentration gradient originating from sluggish ion transport on the surface of Zn metal anodes will result in uneven Zn²⁺ flux, giving rise to severe dendrite growth, especially at high current density. Herein, an ion acceleration layer is introduced by a facile separator engineering strategy to realize modulated Zn²⁺ flux and dendrite-free deposition. Zinc hexacyanoferrate as the modifying agent featuring strong zincophilicity and rapid diffusion tunnel can enable fast trap for Zn²⁺ near the electrode surface and immediate transport onto deposition sites, respectively. The ion acceleration effect is substantiated by improved ion conductivity, decreased activated energy, and promoted Zn²⁺ transference number, which can moderate concentr

SUBMITTER: Tan Y 

PROVIDER: S-EPMC11600266 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature