Structural Disorder in Li₆PS₅I Speeds ⁷Li Nuclear Spin Recovery and Slows Down ³¹P Relaxation-Implications for Translational and Rotational Jumps as Seen by Nuclear Magnetic Resonance.

ABSTRACT: Lithium-thiophosphates have attracted great attention as they offer a rich playground to develop tailor-made solid electrolytes for clean energy storage systems. Here, we used poorly conducting Li₆PS₅I, which can be converted into a fast ion conductor by high-energy ball-milling to understand the fundamental guidelines that enable the Li⁺ ions to quickly diffuse through a polarizable but distorted matrix. In stark contrast to well-crystalline Li₆PS₅I (10^-6 S cm^-1), the ionic conductivity of its defect-rich nanostructured analog touches almost the mS cm^-1 regime. Most likely, this immense enhancement originates from site disorder and polyhedral distortions introduced during mechanical treatment. We used

SUBMITTER: Brinek M 

PROVIDER: S-EPMC7662756 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature