AI Article Synopsis
- Recent studies in sulfide-type solid electrolytes have highlighted the oxidative decomposition of phosphorus and sulfur as a key challenge for their practical use in batteries.
- This research shows that lithium thiophosphate can act as a functional redox mediator to activate commercial lithium sulfide, making it possible to use up to 70 wt.% lithium sulfide in electrodes.
- The findings reveal that this method improves the activation process and performance of lithium sulfide without being limited by low electrolyte content, demonstrating promising results under stringent testing conditions.
Article Abstract
Recent works into sulfide-type solid electrolyte materials have attracted much attention among the battery community. Specifically, the oxidative decomposition of phosphorus and sulfur based solid state electrolyte has been considered one of the main hurdles towards practical application. Here we demonstrate that this phenomenon can be leveraged when lithium thiophosphate is applied as an electrochemically "switched-on" functional redox mediator-generator for the activation of commercial bulk lithium sulfide at up to 70 wt.% lithium sulfide electrode content. X-ray adsorption near-edge spectroscopy coupled with electrochemical impedance spectroscopy and Raman indicate a catalytic effect of generated redox mediators on the first charge of lithium sulfide. In contrast to pre-solvated redox mediator species, this design decouples the lithium sulfide activation process from the constraints of low electrolyte content cell operation stemming from pre-solvated redox mediators. Reasonable performance is demonstrated at strict testing conditions.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6478822 | PMC |
| http://dx.doi.org/10.1038/s41467-019-09638-4 | DOI Listing |
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