Speaker
Description
In this work, microwave sintering is demonstrated as a fast and efficient approach to obtain competitive Li1.3Al0.3Ti1.7(PO4)3 (LATP) suitable for solid-state batteries. LATP pellets were shaped by combined uniaxial and isostatic pressing at four and five tons, respectively, with a green relative density of 71%. Densification was carried out by between 800 and 1100 ºC, revealing a sigmoidal densification curve. A relative density of 91.4% was achieved at 1000 ºC with only 10 minutes of sintering. At temperatures above 1050 ºC, abnormal grain growth and rutile-TiO2 formation led to microstructural degradation. LATP electrolytes sintered at 1000 ºC exhibited an ionic conductivity of 0.5 mS cm-1 at room temperature and an activation energy of 0.20 eV. Symmetric Li|LATP|Li cells cycled for over 500 h at 0.05 mA cm-2 showed very low overpotentials (<40 mV). Overall, these results establish microwave sintering as a rapid, energy-efficient, and scalable route for producing high-performance NASICON-type solid-state electrolytes.
Acknowledgments: This publication is part of the grants PID2021-128548OB-C21&C22 and CNS2023-144190 funded by MICIU/AEI/10.13039/501100011033, “ERDF/EU” and the “European Union NextGenerationEU/PRTR”. A.M.-S. acknowledges the funding from the Aid for Early Research Projects (PAID-06-25) and the postdoctoral fellowship (PAID-10-24) programs from the Vice-Rectorate for Research of Universitat Politècnica de València.
| Professional Status of the Speaker | Postdoc |
|---|---|
| Invitation letter for visa | No |
| Interest in submitting a paper in a special issue of | No interest |
