Bioinspired design of Na-ion conduction channels in covalent organic frameworks for quasi-solid-state sodium batteries.

ABSTRACT: Solid polymer electrolytes are considered among the most promising candidates for developing practical solid-state sodium batteries. However, moderate ionic conductivity and narrow electrochemical windows hinder their further application. Herein, inspired by the Na⁺/K⁺ conduction in biological membranes, we report a (-COO^-)-modified covalent organic framework (COF) as a Na-ion quasi-solid-state electrolyte with sub-nanometre-sized Na⁺ transport zones (6.7-11.6 Å) created by adjacent -COO^- groups and COF inwalls. The quasi-solid-state electrolyte enables selective Na⁺ transport along specific areas that are electronegative with sub-nanometre dimensions, resulting in a Na⁺ conductivity of 1.30×10^-4 S cm

SUBMITTER: Yan Y 

PROVIDER: S-EPMC10224921 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature