About the project

ASTRABAT is a three and a half years European project launched in January 2020. It aims to develop optimal Lithium-ion battery solutions for the increasing demands of the electric vehicle market in particular.

The goal is to fulfil Europe’s need for a safe, high-energy, sustainable and marketable battery for green mobility that could be manufactured in Europe on a massive scale. To do so, the new ASTRABAT cells will enable:

3578222C-1D34-4159-ABBD-99FD95B741F3 Higher energy density and power
87A05242-A71E-43EF-A777-DFB32A2C19FF Increased safety and longer life cycle
B6562EB6-CBDF-41B0-8C4F-7CF2BB43A94C Larger operating temperature range
colors-templatesRisorsa 2 Lower electric vehicle costs

ASTRABAT is part of a broader drive by the European Union to make electric mobility become the next transport mode and contribute to the EU overall goal to reduce greenhouse gas (GHG) emissions by 80-95% by 2050 (currently, the transport sector is responsible for around one quarter of Europe’s GHG emissions). It is expected that e-mobility will represent 70% of the total rechargeable Li-ion battery cell market’s value in 2022 and that 70% of the EU electricity should be produced by renewable energies. Hence, the electric battery storage is vital in this transition to clean mobility and clean energy systems.

Technology

Li-ion batteries for electric vehicles suffer from several issues:

  • Insufficient energy density to comply with expected electric vehicle autonomy of 500 km;
  • Hazardous in safety due to strong battery thermal run away;
  • Unsatisfactory power density to meet fast charge requirement;
  • Lack of battery Giga-factories in Europe.

To overcome these issues, ASTRABAT will:

  1. Develop materials for a solid hybrid electrolyte and electrodes enabling high energy, high voltage and reliable all-solid-state Li-ion cells;
  2. Adapt the development of new all-solid-state batteries to a conventional process adopted for manufacturing electrodes in Li-ion cells;
  3. Design an all-solid-state-battery architecture for the next generation of 2030 Li-ion batteries;
  4. Define an efficient cell architecture to comply with improved safety demands;
  5. Generate a new value chain of all-solid-state batteries, including eco-design, end of life and recycling.

How will ASTRABAT go beyond the state of art of solid-state electrolytes?

ASTRABAT hybrid electrolyte will be based on polymers (ORMOCER® and fluorocarbon polymers) and an inorganic filler and membrane (LLZO). These materials will tackle the generation 4a of cells using high voltage cathode materials, based on Nickel Manganese Cobalt Oxide (NMC) such as NMC622 and NMC811, and Si-based anode. All developed cells will be assessed following standard safety protocols and safety certifications will be performed.

For the ceramic LLZO material, an ionic conductivity of 0.4 mS/cm in the range temperature of 10°C – 50°C will be achieved via Al-doping or Ta-doping. This should enable a decrease of the cell operating temperature and render a more efficient electric vehicle. Moreover, an optimised ionic transport will be achieved by tailoring electrode-electrolyte percolation networks to reduce the ionic pathway length. This will be done by optimising the electrode formulation and by developing new processes to generate organised electrolyte structures.

The improved impedance of the electrode-electrolyte interface will be achieved by developing an inorganic coating on NMC material, organic coating on LLZO and carbon coating on silicon. Different particle sizes of active electrode materials will be synthesised and will contribute to a better harmonisation of the material.

Short cycle life will be avoided thanks to material coatings on NMC that will reduce the capacity fading generated by interfacial reactivity of electrode material with the electrolyte. At the anode side, the Si particle size and carbon coating are also a source of improvement of electrode stability and reduction of irreversibility by solid electrolyte interface formation.

Check out this table to discover the expected KPIs of the ASTRABAT cell!

Developing materials for solid electrolyte and electrodes to achieve high energy density, high voltage and reliable all-solid-state Li-ion cells
Electrolyte
Electrochemical window
0 - 4.5 V
Ionic conductivity
0.4 mS/cm with solid electrolyte
Anode
Specific capacity
900 mAh/g with Si-based electrode in anolyte
Number of cycles to SOH 90%
500 Cycles (validation test)
Cathode
Co ratio in NMC
Co ≤ 10%
Practical capacity
210 mAh/g
Upper cut off voltage
4.5 V/Li
Number of cycles to SOH 90%
500 cycles
Processing techniques compatible with a large-scale manufacturing of cell and validation of a pilot prototype in relevant industrial environment
Capacity of cell processed in ASTRABAT
10 Ah
Energy density
350 Wh/kg
1200 Wh/l
Solid electrolyte
Conductivity between 10 and 50°C
0.4 mS/cm
Developing the 2030's eco-designed generation P-type and E-type all-solid-state battery in pre-prototype
Cell prototype
Charge to 90% SOC
10 C
Power density for 10s pulses (regenerative braking)
> 10 000 W/kg (~30C)
Cost at cell level
< 100 €/kWh
Number of cycles at 80% DoD in E-type
500 cycles
Defining an efficient cell architecture to comply with improved safety demands
Safety
Temperature of thermal runaway
> 150°C
No flammable electrolyte, no leakage, no gas formation during cycling
Structuring the whole value chain of the all-solid-state battery, including eco-design, end-of-life and recycling
End of life product
≥ 65% of recyclable compound

Media kit

Discover and download the ASTRABAT graphic materials.