Sodium Ion Conductivity in Superionic IL-Impregnated Metal-Organic Frameworks: Enhancing Stability Through Structural Disorder.

ABSTRACT: Metal-organic frameworks (MOFs) are intriguing host materials in composite electrolytes due to their ability for tailoring host-guest interactions by chemical tuning of the MOF backbone. Here, we introduce particularly high sodium ion conductivity into the zeolitic imidazolate framework ZIF-8 by impregnation with the sodium-salt-containing ionic liquid (IL) (Na_0.1EMIM_0.9)TFSI. We demonstrate an ionic conductivity exceeding 2 × 10^-4 S · cm^-1 at room temperature, with an activation energy as low as 0.26 eV, i.e., the highest reported performance for room temperature Na⁺-related ion conduction in MOF-based composite electrolytes to date. Partial amorphization of the ZIF-backbone by ball-milling results in significant enhancement of the co

SUBMITTER: Nozari V 

PROVIDER: S-EPMC7044296 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature