Physical sciences

Improvement of the safety of Li-ion batteries subjected to fast/cold charge constraints

The Li-ion battery is the technology selected by all car manufacturers to provide the energy storage required for electrified vehicle deployment. A battery, during its lifecycle, can encounter a wide range of operating conditions. Some of those operating conditions can accelerate battery degradation and can lead to safety issues.
An experimental campaign on the effect of operating at cold temperature condition, conducted on NMC811-SiC cylindrical cells, has highlighted safety issues. The physical mechanism believed to cause these safety issues is Li-plating.

Transport of Pollutants in Porous Media: A Lattice Boltzmann Approach Accounting for Complex Adsorption Processes

When simulating the transport of pollutants in the subsurface or in the context of water remediation, special attention should be paid to the specific adsorption behavior of complex pollutants. These compounds, which are receiving increasing attention worldwide, include already identified as well as emerging pollutants (e.g., PFAS, nanoplastics, personal care products…). These molecules are characterized by physico-chemical behaviors at the fluid-solid interface that generally cannot be described using classical models (e.g., Henry, Langmuir).