Research network on electrochemical energy storage,
Research center on batteries and supercapacitors
Safety
Coordinator: Stéphane Laruelle

Security could be a drag on new materials development and on electrochemical systems commercialization. Therefore, it is important to assess the risks to control and/or to direct studies toward safer systems.

Focuses

  • Firstly, promising materials or electrolytes from our network groups are packed in complete electrochemical devices thanks to the pre-prototyping platform. Then, safety tests are performed at INERIS with the STEEVE Sécurité platform. These cells undergo severe constraints (overload, shorting, adiabatic heating…). The team checks there is neither fire nor explosion.
  • The reactivity at the material /electrolyte interface is assessed by calorimetric methods.  Products from decomposition are identified by different characterization means (IR, XPS, DRX, TEM, mass spectrometry). These analyses are available thanks to our analytic platforms. Our team is able to highlight the thermic degradation mechanisms with the obtained results. Therefore, it could propose ways to optimize the materials and the electrolyte. The effect of electrolyte composition (for Li-ion batteries) on SEI properties and on the ageing is also studied. The “Safety” group usually uses mass spectrometry in this case. The thematic benefits from the safety analytic platform.

  • Modelling of thermic runaway for batteries is done in collaboration with INERIS and IFPEN. It concerns various parameters such as electrode composition and ageing.