Doctoral theses

Lithium ion batteries are today the most realistic solution to answer the ever-increasing demand for electrochemical energy storage devices. The two main requirements for such systems are a higher gravimetric capacity and an increased safety, both can be solved using a solid electrolyte instead of the liquid ones in the current technology.

Emulsions are systems present in many industrial processes and products. Their stability depends on the density difference between the dispersed and continuous phases and on their rheology (creaming or sedimentation), on the interactions between the drops (coalescence) and on their polydispersity (Oswald ripening).

To support the development of electricity production from wind power, IFP Energies nouvelles is involved in the energy transition as a research and training player, especially in emerging technologies such as floating offshore wind turbines (FOWT). 

The proposed PhD is taking place in the general context of the development of hydrogen-powered electric vehicles and more specifically aims to improve the tools for modelling and characterizing polymer membranes used in Proton Exchange Membrane Fuel Cells (PEMFC).

Recycling plastic materials is essential for reducing the amount of waste, but currently used mechanical recycling processes have very important limitations (sorting control, color). Chemical recycling will allow a more complete material recovery and this PhD thesis aims at contributing to its development.

Understanding and modeling trace gas emissions from tundra soils to the atmosphere is critical to predict surface-atmosphere feedbacks on current and future global warming. Tundra soils are underlain by permafrost, a thermal condition of the ground which remains at or below 0 °C for two or more years throughout the high latitudes.

A better understanding of the processes resulting in geothermal and/or biogenic gas emissions at the seafloor is crucial in order to quantify gas evolution in the deep ocean and better assess its contribution to global warming.

The Rock-Eval® (RE) thermal analysis was developed at IFPEN during the 1970’s as a standard benchmark tool in oil exploration, and became more and more frequently used during the last 20 years in soil science in order to characterize soil organic matter and its thermal stability.

As our climate is changing the impact of water, or the lack of it, on how we develop and use the landscape is becoming increasingly uncertain. Mountain belts can be thought of as water towers, securing steady flow of irrigation, drinking and industrial water to adjacent population centres.

Fluid-rock interactions play a key part in the evolution of our environment.

The Albien aquifer constitutes a deep reservoir located under the chalk of the Parisian basin composed of unconsolidated clay-sandstone deposits and is considered as a strategic resource for Ile de France in the event of long-term unavailability of classic resources.

The earth’s system is a key provider of energy through its constant release of heat. In most continental areas of our planet, this heat is limited; the thermal gradient is about 30°C/km in most sedimentary basins, and even lower in cratonic areas.