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  4. Synthesis and sintering of Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte for ceramics with improved Li+ conductivity
 
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2020
Journal Article
Title

Synthesis and sintering of Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte for ceramics with improved Li+ conductivity

Abstract
The key material for all-solid-state batteries is the solid electrolyte. In concepts with high energy density and capacity, this Li+ conductive component has two essential functions: Substituting the liquid electrolyte in the cathode and separating the cathode from the anode. Therefore, the research on Li+ conductive solids is one important step to realize high performing all-solid-state batteries. In this study, two different methods of preparing Li1.3Al0.3Ti1.7(PO4)3 (LATP) powder are compared with regard to particle size, phase purity and sintering properties. As top-down method the melting and as bottom-up route the sol-gel synthesis are applied. Spark Plasma Sintering (SPS) is used to densify the powders at temperatures between 800 and 1000 °C. The densities, the microstructures and the Li+ conductivities are compared in relation to the preparation method. Using sol-gel synthesis, the phase purity of the LATP powder is higher compared to the top-down route. The milling of the synthesized powder increases the homogeneity of the resulting microstructure and enhances the ionic conductivity. Room temperature Li+ conductivity of 1 × 10−3 S cm-1 with a high density of 99.4% was achieved with the milled, sol-gel synthesized powder at a sintering temperature of 1000 °C.
Author(s)
Wätzig, Katja  
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Rost, Axel  orcid-logo
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Heubner, Christian
TU Dresden
Coeler, Matthias
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Nikolowski, Kristian  
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Wolter, Mareike
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Schilm, Jochen  orcid-logo
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Journal
Journal of alloys and compounds  
Project(s)
Artemys
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)  
Open Access
DOI
10.1016/j.jallcom.2019.153237
Additional full text version
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Language
English
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Keyword(s)
  • all-solid-state batteries

  • sol-gel synthesis

  • separator

  • high ionic conductivity

  • LATP

  • lithium aluminum titanium phosphate

  • solid electrolyte

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