Macroscopically Ordered Piezo-Potential in All-Polymetric Solid Electrolytes Responding to Li Anode Volume Changes for Dendrites Suppression.

ABSTRACT: Solid-state polymer electrolytes (SPEs) address the safety issue of lithium-metal batteries but fail to resolve dendrite growth caused by anode volume fluctuations. Piezoelectric poly(vinylidene-co-trifluoroethylene) [P(VDF-TrFE)] nanofiber interphases with aligned dipoles are developed that generate macroscopically directional electric fields during lithium expansion. Strategically orienting the piezoelectric field against Li⁺ migration redirects deposition from dendrite tips to planar regions through potential gradient steering. This approach enhances lithium salt dissociation while suppressing anions movement, achieving both high ionic conductivity (5.0 × 10^-4 S cm^-1) and Li⁺ transference number (0.40). Symmetric Li cells achieve 3000 h stabil

SUBMITTER: Li SF 

PROVIDER: S-EPMC12786380 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature