Data · dataset · 2022

Towards Understanding of the Li Ion Migration Pathways in the Lithium Aluminium Sulphides Li3AlS3 and Li4.3AlS3.3Cl0.7 via 6,7Li Solid-State Nuclear Magnetic Resonance Spectroscopy

Listed in University of Liverpool Research Data Catalogue

Li-containing materials providing fast ion transport pathways are fundamental in Li solid electrolytes and the future of all-solid-state batteries.

Description

Understanding these pathways, which usually benefit from structural disorder and cation/anion substitution, is paramount for further developments in next-generation Li solid electrolytes. Here, we exploit a range of variable temperature 6Li and 7Li nuclear magnetic resonance approaches to determine Li ion mobility path-ways, quantify Li ion jump rates and subsequently identify the limiting factors for Li ion diffusion in Li3AlS3 and chlorine doped analogue Li4.3AlS3.3Cl0.7.

Static 7Li NMR line narrowing spectra of Li3AlS3 show the existence of both mobile and immobile Li ions, the latter limiting long-range translational ion diffusion, while in Li4.3AlS3.3Cl0.7, a single type of fast-moving ion is present and responsible for the higher conductivity of this phase. 6Li-6Li exchange spectroscopy spectra of Li3AlS3 reveal that the slower moving ions hop between non-equivalent Li positions in different structural layers.

Read the rest (2 more)

The absence of the immobile ions in Li4.3AlS3.3Cl0.7, as revealed from 7Li line narrowing experiments, suggests an increased rate of ion exchange between the layers in this phase compared with Li3AlS3. Detailed analysis of spin-lattice relaxation data allows extraction of Li ion jump rates that are significantly increased for the doped material and identify Li mobility pathways in both materials to be three-dimensional.

The identification of factors limiting long range translational Li diffusion and understanding the effects of structural modification (such as anion substitution) on Li ion mobility provide a framework for the further development of more highly conductive Li solid electrolytes.

Topics

From keywords: Earth & Environmental Science
Inferred from text: Magnetic resonance imaging 65%

Provenance · 1 source records, 6 field assertions

Source	Key	Last seen	Raw
University of Liverpool Research Data Catalogue	oai:datacat.liverpool.ac.uk:1977	17 h ago	JSON v1

Field	Assertion	Extractor	Evidence
concepts[field].local:field:earth-environmental	mapping · datacat liverpool ac uk	connector:datacat_liverpool_ac_uk@1.0.0
concepts[modality].local:modality:mri	enrichment · datacat liverpool ac uk	keyword-concept-rules@1.0.0	title+description (65%)
description	source · datacat liverpool ac uk	connector:datacat_liverpool_ac_uk@1.0.0	/metadata/dc/description
license_text	source · datacat liverpool ac uk	connector:datacat_liverpool_ac_uk@1.0.0
publication_date	source · datacat liverpool ac uk	connector:datacat_liverpool_ac_uk@1.0.0
title	source · datacat liverpool ac uk	connector:datacat_liverpool_ac_uk@1.0.0	/metadata/dc/title

Towards Understanding of the Li Ion Migration Pathways in the Lithium Aluminium Sulphides Li3AlS3 and Li4.3AlS3.3Cl0.7 via 6,7Li Solid-State Nuclear Magnetic Resonance Spectroscopy

Description

Links

Where it is published

Topics