Fraunhofer Institute for Integrated Systems and Device Technology IISBWe develop and analyze sustainable battery systems, in particular rechargeable aluminum-ion battery systems (AIB), a cost-effective and non-flammable electrical storage system. When using natural graphite as cathode material, we have demonstrated energy densities of 135 Wh/kg based on the active mass. As a high power storage, our AIB can be loaded and unloaded in less than 20 seconds. The process is reversible, and we have demonstrated more than 10.000 cycles with over 95 % charging efficiency in lab cells, with over 85 % energy efficiency. We manufacture single and multi-layer pouch cells with a capacity of up to 150 mAh, which achieve more than 2000 cycles at a charging rate of up to 10 C. The current performance of the AIB is already comparable to lead-acid batteries. This means that AIBs have great potential for stationary and hybrid mobile applications, e.g., for grid stabilization or an uninterruptible power supply.
Die wichtigsten Komponenten einer Aluminium-Ionen-Batterie: Graphitpulver, Aluminium-Folie und ein spezieller Elektrolyt, der aus einer bei Raumtemperatur flüssigen Salzschmelze besteht.
© Maximilian Wassner / Fraunhofer THM
Energy Materials
Operando structural analysis of active materials of battery cells using X-ray diffractometry during charging and discharging
Electrochemical characterization of aluminium ion pouch cells
Post-mortem analysis of battery cell components under an inert atmosphere
Services
- Synthesis and functionalization of powders for use as electrode materials and other functional applications
- Preparation of slurries and production of electrodes with different coating processes
- Morphological and structural characterization of particles and layers using
- REM
- Raman with operando option
- XRD with operando option
- FTIR, ATR-IR
- BET
- Laser diffraction
- Post-mortem analysis of battery components using light microscopy under an inert atmosphere
- Electrochemical analysis
- Surface analysis depending on the temperature
- Conductivity of electrolytes
- Surface analysis depending on the temperature
- Electrochemical characterization of battery cells
- Lab cells (ElCells®) and pouch cells
- CC, CV, EIS
More Information
- First Corrosion Stable Aluminum Ion Battery Pouch Cell
- A low‐cost Al‐graphite battery with urea and acetamide‐based electrolytes
- Cover Profile, ChemElectroChem, Issue 11/2021
- GridBatt: – Battery Technologies to Ensure Stable Grid Operation
- Press release: Fraunhofer IISB Award for Research and Development 2022
