Self-assembled polyelectrolytes with ion-separation accelerating channels for highly stable Zn-ion batteries.

ABSTRACT: Aqueous zinc-ion batteries offer a sustainable alternative to lithium-ion batteries due to their abundance, safety, and eco-friendliness. However, challenges like hydrogen evolution and uncontrolled diffusion of H⁺, Zn²⁺, and SO₄²⁻ in the electrolyte lead to the dendrite formation, side reactions, and reduced Coulombic efficiency for Zn nucleation. Here, to simultaneously regulate the diffusion of cations and anions in the electrolyte, an ion-separation accelerating channel is constructed by introducing layer-by-layer self-assembly of a flocculant poly(allylamine hydrochloride) and its tautomer poly(acrylic acid). The dual-ion channels, created by strong electrostatic interactions between carboxylate anions and ammonia cations, block SO₄^2- and promote the u

SUBMITTER: Hu X 

PROVIDER: S-EPMC11890744 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature