Dual polarization in extended π-conjugated zwitterionic COF facilitates Li⁺ aligned transportation for high-performance solid-state lithium-metal batteries.

ABSTRACT: Rational design of covalent organic frameworks (COFs) with tailored topology and multipolar characteristics offers a promising avenue for developing advanced composite electrolytes in high-rate solid-state lithium-metal batteries (SLMBs). Herein, we report an extended π-conjugated zwitterionic COF (QZwiCOF) that innovatively modulates the microstructure of PVDF-HFP to enable aligned Li⁺ transport. The unique dual polarization induced by enhanced intramolecular charge transfer in QZwiCOF maximizes PVDF-HFP's dipole moment and structural regularity. Coupled with the amphiphilic nanochannel of QZwiCOF that provides Li⁺-selective conduction, the resulting QZwiCOF-based composite electrolyte (ZiCP CPE) with merely 3 wt% QZwiCOF achieves enhanced ionic conductivity (σ

SUBMITTER: Xu L 

PROVIDER: S-EPMC12477636 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature