Description du sujet de thèse

The proposed doctoral thesis will focus on the development of positive electrode (cathode) materials, specifically Mn-rich Prussian Blue Analogues of the formula KₓMn[Fe(CN)₆]₁–ᵧ·zH₂O. The main objective is to study how synthesis parameters—such as surfactant type, acid concentration, temperature, and reaction time—affect the composition, water content, [Fe(CN)₆]⁴⁻ vacancy concentration, and particle microstructure. These factors are critical to maximizing the K/metal ratio and achieving high reversible capacity.
During the initial phase of the project, co-precipitation and hydrothermal methods will be prioritized. Syntheses in non-aqueous media will also be explored as benchmarks to evaluate the benefits and limitations of aqueous routes.
A comprehensive characterization strategy will be implemented to establish the relationship between synthesis conditions, material composition, structure, and electrochemical properties. Advanced techniques will include high resolution X-ray and neutron diffraction, X-ray absorption spectroscopy (XAS), chemical and thermal analyses, and low-temperature Mössbauer spectroscopy. In addition, operando XRD, Mössbauer, and XAS studies are planned for the most promising compositions.
This research will be performed in the frame of collaborative project between ICMCB- ICGM (Montpellier) – IS2M (Mulhouse) and CEA (Grenoble and Pessac). A stay in CEA Grenoble is expected for the synthesis upscale of the best performing material.

Contexte de travail

Created in 1995, the Bordeaux Institute of Condensed Matter Chemistry (ICMCB) focuses its research on Solid State Chemistry, Materials Science and Chemistry and Process: designing, preparing, shaping and characterizing materials in order to discover, control and optimize specific functions. The ICMCB carries out fundamental research on model materials and/or materials with potential applications.
The ICMCB is a UMR with an average of 280 agents (permanent and non-permanent), with 3 tutelles, hosted by the CNRS and in total ZRR. The position is located in a sector covered by the Protection of Scientific and Technical Potential (PSTP), and therefore requires, in accordance with the regulations, that the arrival of the agent be authorized by the competent authority of MESR.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.

Contraintes et risques

Risque laser classe IV