Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 17, 2024

Abstract The key issue in utilizing solid polymer electrolytes for high‐energy‐density lithium metal batteries is to balance the conflicting demands of superior processability, adequate ionic conductivity, and mechanical stability. Inspired by molecular structure design, a metal‐organic framework‐derived polyether poly(urethane urea) electrolyte (denoted as ePU@H SPE) has been synthesized via facile polycondensation method involving covalent crosslinking. reduced crystallinity numerous polar groups SPEs enhance Li salt dissociation create efficient + ion diffusion channels, yielding remarkable conductivity (1.48 × 10 −4 S cm −1 ). backbones, incorporating bonds dynamic hydrogen bonds, provide superb strength (5.12 GPa), high toughness (1240%), excellent resilience, which suppress dendrite growth buffer electrode volume fluctuations during cycling. Leveraging these attributes, well‐designed SPE enables ultra‐high durability plating/stripping over 2300 h. Moreover, integrated LFP|ePU@H|Li batteries, generating delicate electrode/electrolyte interfacial contact, deliver an exceptionally long lifespan (86% retention 500 cycles at 1 C). pouch cell operates reliably even under severe deformation external damage. Impressively, stable cycling performance full high‐voltage LCO high‐capacity cathodes further verifies significant potential advanced practical applications.

Language: Английский