Blacklight sintering of garnet-based composite cathodes

Journal of the European Ceramic Society, vol. 44, pp. 3039–3048

Abstract

Garnet-structured Li7La3Zr2O12 (LLZO) is an attractive electrolyte for lithium solid-state batteries (SSBs), but its processing requires long sintering at temperatures above 1000 °C to achieve sufficient ionic conductivity. Such sintering is not only time and energy consuming, but also leads to undesirable material interactions. Therefore, a significant reduction of the sintering time is very important for the future development of garnet-based batteries. A promising method is the recently introduced photonic blacklight sintering with light sources in the UV spectrum, which enables energy-efficient sintering of ceramic layers within seconds. In this work, blacklight sintering of garnet-based SSBs is validated using a model cell consisting of LLZO and LiCoO2 (LCO) composite cathode layers printed on dense LLZO pellets. An optimized sintering program allowed the production of working cells in only 20 seconds. This study demonstrates the suitability of blacklight sintering for processing garnet-based SSBs and provides guidance for future process optimization.

Authors 12

1. Walter Sebastian Scheld corresponding

   Forschungszentrum Jülich · University of Duisburg-Essen

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

   University of Duisburg-Essen, Faculty of Engineering and Center for Nanointegration Duisburg-Essen CENIDE, Lotharstraße 1, 47057 Duisburg, Germany

2. Julian N. Ebert

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

3. Michael Scherer

   Technische Universität Darmstadt

   Affiliation as printed

   Department of Materials and Earth Sciences, Technical University of Darmstadt, Peter-Grünberg-Straße 2, 64287 Darmstadt, Germany

4. Lovro Fulanović

   Technische Universität Darmstadt

   Affiliation as printed

   Department of Materials and Earth Sciences, Technical University of Darmstadt, Peter-Grünberg-Straße 2, 64287 Darmstadt, Germany

5. Lukas Porz

   Technische Universität Darmstadt

   Affiliation as printed

   Department of Materials and Earth Sciences, Technical University of Darmstadt, Peter-Grünberg-Straße 2, 64287 Darmstadt, Germany

6. Christian Dellen

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

7. Martin Ihrig

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

8. Sven Uhlenbruck

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

9. Martin Finsterbusch

   Forschungszentrum Jülich

   Affiliation as printed

   Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

10. Olivier Guillon Aachen Institute of Mineral Engineering (GHI)

    Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

    Affiliation as printed

    Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

    Institute of Mineral Engineering, RWTH Aachen University, 52064 Aachen, Germany

    Jülich Aachen Research Alliance JARA-ENERGY, 52425 Jülich

11. Dina Fattakhova‐Rohlfing corresponding

    Forschungszentrum Jülich · University of Duisburg-Essen

    Affiliation as printed

    Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

    University of Duisburg-Essen, Faculty of Engineering and Center for Nanointegration Duisburg-Essen CENIDE, Lotharstraße 1, 47057 Duisburg, Germany

12. Wolfgang Rheinheimer Aachen Institute of Mineral Engineering (GHI)

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing IEK-1, 52425 Jülich, Germany

    Institute of Mineral Engineering, RWTH Aachen University, 52064 Aachen, Germany