ISOLDE Workshop and Users meeting 2024

Measuring interfacial diffusion of $^{8}Li^{+}$ in solid-state battery materials with ${\beta}$-NMR

27 Nov 2024, 18:05

1m

61/1-201 - Pas perdus - Not a meeting room - (CERN)

Poster (In person) Poster session

Speaker

Amy Sparks (CERN)

Description

Solid-state batteries (SSBs) are considered as a promising solution to address the safety issues and energy density limitations of conventional liquid batteries$^{1,2}$. Although there have been significant breakthroughs in SSB technology in recent years, several challenges still need to be addressed before they reach the commercial market. A key challenge is their slow charge and discharge rates, which arises from poor ion diffusion and conductivity at the interfaces$^{3,4}$. Unfortunately, many standard techniques to study these materials are limited to the bulk, making interface optimization difficult$^{5-7}$. ${\beta}$-NMR, however, offers spatial precision for probing ion transport$^{8-10}$. Using ${\beta}$-NMR relaxometry as a function of temperature, we aim to compare $^{8}Li^{+}$ diffusion in the bulk and anode-electrolyte interface. These experiments, using electrolytes with varying Cl and S content (argyrodites $Li_{7}$P$S_{6}$, $Li_{7}$P$S_{6}$Cl, and $Li_{5.5}$P$S_{4.5}$$Cl_{1.5}$), will help determine the role of these anions in interfacial conductivity.

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