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3D-SSB – 3D-structuring of solid-state cathodes to increase the power and energy density

Funded by: BMBF

Contact Person: Laura Helmers, Christine Burmeister

Summary of the project:

The aim of the project “3D-SSB” is the increase of the power and energy density of solid-state batteries (SSB) by specific structuring of high-capacity cathodes. In addition, a process chain for the scalable production of such 3D-structured electrodes will be evaluated.
For this purpose, a construction set will be developed that contains precursors with different compositions and properties. Based on these precursors, innovative additive and subtractive methods for the targeted production of two- and three-dimensional structured solid-state cathodes will be evaluated. Structure simulations are performed to identify suitable hierarchical and graded structures that lead to an increase in the power density. With the help of improved inactive components, the 3D-structured solid-state cathodes are further processed into high-capacity SSB cells, which exhibit a higher power density compared to cells with unstructured cathodes. One of the main focus concentrates on the analysis of the interfaces within the cathode and between the different cell components. Besides, a method for evaluation of the individual processes with regard to their scalability to industrial production will be developed. This enables the identification of a suitable process chain for the large-scale production of 3D-structured SSB.


Fig. left: Scheme of an All-Solid-State-Battery with a 3D-structured composite cathode.
Fig. right: Overview of possible precursors for the production of 3D-structured composite cathodes.. 

Tasks and targets of the iPAT:

  • Process development for the specific adjustment of physical and electrochemical properties of precursors (construction set) for the production of solid-state electrolyte-based composite cathodes.
  • Development of a powder bed process for the additive manufacturing of composite cathodes.
  • Modeling and simulation of structured electrodes using DEM and FEM to identify suitable hierarchical and graduated structures.
  • Development of a high-energy solid-state battery cell with an increased power density.
  • In-depth physical and electrochemical analysis of 3D-structured composite cathodes and solid-state battery cells.
    Project partners:

    Continental CPT Zwei GmbH, VON ARDENNE GmbH, LPKF Laser and Electronics AG, SITEC Industrietechnologie GmbH, TU Braunschweig (Institut für Partikeltechnik, Institut für Füge- und Schweißtechnik, Institut für Konstruktionstechnik), MEET Batterieforschungszentrum, BASF SE, Schott AG, Evonik Industries AG, Gema GmbH

    Team Members


    Cooperative project: Project results database and communication management for the battery cell production cluster ProZell (EMKoZell) more

    BaSS – BatterieSicherheitsStandardisierung more

    eKoZell – Environmental and Cost Assessment, Model and Communication Management for the Competence Cluster ProZell – Accompanying Project to the ProZell Cluster (eKoZell) moremore

    Cooperative project: Project results database and communication management for the battery cell production cluster ProZell (EMKoZell) more

    EVOLi²S – Evaluation of the technical and economic advantages of the open-cell module for lithium-ion and lithium-sulphur batteries with regard to stationary and mobile applications more

    Optimal electrode structure and density by design of mixing and calendering procedures (MiKal) more

    MultiDis – Multiscale approach for the description of carbon black deagglomeration in the dispersion process for a process and performance-optimized process control more

    ÖkoTroP – Ecologically gentle dry coating of battery electrodes with optimized electrode structure more

    PräLi – Prelithiation of electrodes more

    ProfiStruk – Process and system development for the process integrated inline structuring of Li-electrodes more

    Process modeling of the calendering of energy-rich electrodes (ProKal) more

    Roll-It more

    LiPlanet – Li-ion cell pilot lines network moremore

    LoCoTroP – Low cost dry coating of battery electrodes for energy efficient and environmentally friendly production processes more

    Sim4Pro- Digitalization Platform – Simulations for battery cell production more

    ZiLsicher – Zink-Air-Accumulators as safe electrochemical storage for low emission and explosion proof industrial applications more

    Finished Projects
    BenchBatt – Process based energy optimization and validation of Lithium-Ion and Lithium-Sulfur battery electrodes more

    GEENI – Graduate Program for Energy Storage and Electromobility more

    INSIDER – metal free Dual Ion energy storage technology utilizing anionic -intercalation more

    Academic Initiative for e-Mobility – Education and Training in the University Network MOBIL4e more

    ProLiEMo – Production Research for High-Power Lithium-Ion Batteries for Electro Mobility  mehr

    Functional Materials and Material Analysis for High Power Lithium-Ion Batteries more

    LithoRec – LithoRec – Recycling of Lithium Ion Batteries mehr