Thèse CIFRE; H​/F - Modélisation du dépôt de lithium métallique dans une batterie - Grenoble et Amiens

Job Title

Doctoral Student In Electrochemistry Batteries

In a context of full environmental and digital transformation, the automotive industry is rapidly evolving towards electrification. This transition is accompanied by major strategic challenges, such as increasing autonomy, improving safety, reducing costs, and minimizing the environmental impact of vehicles. To meet these challenges, Renault Group through Ampère, places technological innovation at the heart of its strategy and performance through the development of electric vehicles.

In this context, Renault strengthens its research and innovation activities in the field of post-lithium technology modeling. Thus, the Electrochemistry Batteries Innovation and Research Team wishes to recruit a doctoral student for a 3-year doctoral thesis on the modeling of lithium metal batteries.

By joining Renault Group Engineering, you join a field with strong technical, environmental, and economic stakes.

Your missions

Description of the research topic

To improve the energy density of batteries, one of the most studied approaches today by many research groups is to replace the graphite electrode with a lithium metal electrode or a type of "anode-free" system. During charging, lithium from the positive electrode deposits on the surface of the negative electrode, and is then removed during discharge. This mechanism is called "plating/stripping".

To understand this mechanism, study it, and reduce experimental costs, modeling is an essential tool. However, the fine understanding of lithium metal deposition, as well as its optimization, are still subjects at the research scale. The subject therefore focuses on the modeling of lithium metal deposition within a lithium metal battery. The modeling results will be compared to real lithium deposits obtained after post-mortem analysis of cells.

It is in this context that these doctoral works are carried out.

Stages of the thesis

Towards this objective, you will have the following missions:

• Conduct bibliographic research to establish a state of the art on the modeling of lithium metal deposition and its characterization;
• Develop a lithium metal deposition model;
• Define the input parameters necessary for modeling;
• Test lithium metal cells or "anode-free" type cells;
• Experimentally characterize lithium metal deposition to compare it with modeling results.

Your profile

You are a graduate of a BAC+5 from a university or an engineering school with strong experience in physico-chemical modeling of Li-ion batteries (physico-chemical and electrochemical modeling, atomistic modeling, Newman model) and you have knowledge of the mechanisms of operation and aging of Li-ion or post Li-ion cells.

Experimental experience in a chemistry and/or battery laboratory would be a plus.

You have knowledge of characterization and analysis techniques (morphological, structural, and compositional).

You are autonomous, rigorous, and organized. You enjoy working on modeling and experimentation coupling and have writing and synthesis skills. You know how to work in a team.

Your level of English is an asset to evolve in a multicultural context within Renault Group (minimum TOEIC level 750). If you have not yet passed a test at the time of your application, you can take an online English test during the recruitment process.

You want to participate in the adventure of tomorrow's automotive? Join us!

In the context of this position, you will collaborate with two laboratories located in Grenoble and Amiens. Your time will be divided over approximately 18 months in each, with occasional trips to the other site. Additionally, you will dedicate about 10% of your time to Renault local offices in Guyancourt (78).

Transverse

36 months

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