| | | | | | | webmail : intra-extra| Accès VPN| Accès IST| Contact | Français

PhD subjects

5 sujets IRAMIS

Dernière mise à jour : 13-07-2020


««

• Physical chemistry and electrochemistry

 

Experimental approach of the multi-scale Li diffusion through the solid composite electrolytes of garnet LLZO ceramic materials and polymers intended to all-solid-state battery

SL-DRF-20-0561

Research field : Physical chemistry and electrochemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie

Laboratoire d’étude des éléments légers

Saclay

Contact :

Saïd Yagoubi

Thibault CHARPENTIER

Starting date : 01-10-2020

Contact :

Saïd Yagoubi
CEA - DRF/IRAMIS/NIMBE/LEEL

+ 33 1 69 08 42 24

Thesis supervisor :

Thibault CHARPENTIER
CEA - DRF/IRAMIS/NIMBE/LSDRM

33 1 69 08 23 56

Personal web page : http://iramis.cea.fr/Pisp/said.yagoubi/

Laboratory link : http://iramis.cea.fr/nimbe/leel/

More : http://iramis.cea.fr/nimbe/lsdrm/

Lithium-ion batteries, launched onto the market in 1991, are nowadays largely present in a large variety of applications. Since that, important progresses were obtained but no major technological breakthrough has been recorded. Envisioned future uses and needs such for electrical vehicles will require the use of new concepts with higher energy density, low manufacturing costs and reduced environmental risks such as auto-inflammation or electrolyte leakage. In order to meet these requirements, the new generation of all-solid-state batteries using a Ceramic–Polymer solid electrolytes, combined with Li metal anodes can provide solutions and satisfy the growing energy needs. The barriers to overcome allowing the development of all-solid-state battery technology consist mainly in the research for new chemically stable and electrochemically efficient solid composite electrolytes (cationic conduction at ambient temperature close to 1mS.cm-1 and large electrochemical window).

A great part of the work in this project will be devoted to the development of solid composite electrolyte materials and to the optimization of the interfaces ceramic/polymer and composite electrolyte/electrode. Combination of multi-scale characterization, electrochemical, structural, spectroscopic and analytical techniques including nuclear microanalysis will deepen the understanding of the Lithium dynamics through structured networks of battery.





Keywords: solid electrolyte, garnet LLZO, polymer, composite LLZO/polymer, all-solid-state battery, interfaces, multi-scale Li+ dynamic characterization, lithium metal and dendrite, electrochemical efficiency, solid-state NMR, X-ray and neutrons diffraction, ion beam analysis.

SL-DRF-20-0450

Research field : Physical chemistry and electrochemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie

Laboratoire Interdisciplinaire sur l’Organisation Nanométrique et Supramoléculaire

Saclay

Contact :

Florent Malloggi

Jean-Philippe RENAULT

Starting date :

Contact :

Florent Malloggi
CEA - DSM/IRAMIS/NIMBE/LIONS

+3316908 6328

Thesis supervisor :

Jean-Philippe RENAULT
CEA - DRF/IRAMIS/NIMBE/LIONS

01 69 08 15 50

Personal web page : http://iramis.cea.fr/Pisp/florent.malloggi/

Laboratory link : http://iramis.cea.fr/nimbe/lions/

Theoretical chemistry for the design of innovative xenon biosensors based on nuclear magnetic resonance

SL-DRF-20-0976

Research field : Physical chemistry and electrochemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie

Laboratoire Structure et Dynamique par Résonance Magnétique (LCF)

Saclay

Contact :

Jean-Pierre DOGNON

Patrick BERTHAULT

Starting date : 01-10-2020

Contact :

Jean-Pierre DOGNON
CEA - DRF/IRAMIS/NIMBE

+33 1 69 08 37 14

Thesis supervisor :

Patrick BERTHAULT
CEA - DRF/IRAMIS/NIMBE/LSDRM

+33 1 69 08 42 45

Personal web page : http://iramis.cea.fr/Pisp/patrick.berthault/

Laboratory link : http://iramis.cea.fr/nimbe/lsdrm/

129Xe nuclear magnetic resonance (NMR) combined with spin-hyperpolarization through optical pumping has recently given rise to a molecular imaging of high sensitivity and usable even on deep biological tissues. The laboratory is one of the pioneers in this domain. The approach consists in using molecular systems capable of reversibly encapsulating the noble gas. These host molecules have a chemical antenna recognizing a biological receptor or analyte, and the large frequency variation experienced by encapsulated xenon gives rise to a spectroscopic imaging of high sensitivity. An innovative project was recently funded by the French National Research Agency (ANR) with the main goal of designing biosensors for the measurement of extracellular pH. Local modification of pH is a key parameter in different pathologies such as cancers. For this purpose, the numerical approach in this project is structured on different scales with the objectives of calculating the chemical shift of xenon in host edifices, understanding its origin, developing predictive models (relativistic quantum mechanics) and simulating xenon in-out exchange phenomena which acts on the NMR measurement sensitivity (classical and ab initio molecular dynamics).
Aging of Li-ion batteries with a silicon anode studied by radiolysis

SL-DRF-20-0517

Research field : Physical chemistry and electrochemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie

Laboratoire Interdisciplinaire sur l’Organisation Nanométrique et Supramoléculaire

Saclay

Contact :

Nathalie HERLIN

Sophie LE CAER

Starting date : 01-10-2020

Contact :

Nathalie HERLIN
CEA - DRF/IRAMIS/NIMBE/LEDNA

0169083684

Thesis supervisor :

Sophie LE CAER
CNRS - DRF/IRAMIS/NIMBE/LIONS

01 69 08 15 58

Personal web page : http://iramis.cea.fr/Pisp/sophie.le-caer/

Laboratory link : http://iramis.cea.fr/nimbe/lions/

Environmental problems due to the intensive use of fossil fuels create an ever greater pressure to find efficient energy storage devices for intermittent energy sources. In this context, lithium-ion batteries are very attractive because they display a high energy density and a long life compared to other rechargeable systems.



However, these batteries are very complex systems and the challenge of this thesis is to use a new approach, radiolysis, to perform accelerated aging studies. This will help to find new, more robust electrolytes, in combination with the most efficient silicon-based anode materials, which can then be used in predictive models of longer-term behavior. For this, the degradation of electrolytes will be studied, as well as the joint evolution of silicon-based anode materials, in order to simultaneously understand the reactivity at the interfaces and the reactivity due to the electrolyte.
NMR metabolomic profiles with increased sensitivity, complementarity with Mass Spectrometry

SL-DRF-20-1037

Research field : Physical chemistry and electrochemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie

Laboratoire Structure et Dynamique par Résonance Magnétique (LCF)

Saclay

Contact :

Gaspard HUBER

Starting date : 01-10-2020

Contact :

Gaspard HUBER
CEA - DRF/IRAMIS/NIMBE/LSDRM

01 69 08 64 82

Thesis supervisor :

Gaspard HUBER
CEA - DRF/IRAMIS/NIMBE/LSDRM

01 69 08 64 82

Personal web page : http://iramis.cea.fr/Pisp/gaspard.huber/

Laboratory link : http://iramis.cea.fr/nimbe/lsdrm/

Metabolomics is the science that relates to the analysis of metabolites, the small molecules (less than 1500 Da) present in organisms. It helps to understand the functioning of these organisms, and to detect, identify or even quantify metabolites that sign a given pathological state or a stress. NMR is a complementary technique to mass spectrometry (MS) to analyze complex mixtures of metabolites. However, due to its low sensitivity, NMR is not used as much as MS. There are different techniques for increasing the NMR signal. One of them takes advantage of the special properties of parahydrogen, a spin isomer of dihydrogen gas. Recently, a method based on parahydrogen, called SABRE-Relay, has been invented. In an aprotic medium, it allows the increase of sensitivity of signals of any molecule comprising at least one mobile proton.



The thesis has two components. On the one hand, it consists in developing the methodology of the SABRE-Relay method when it applies to cellular metabolic extracts or to biofluids, a large proportion of metabolites comprising at least one exchangeable proton. The objective is to propose new metabolic profiles, complementary to conventional ones, for a better identification or even quantification of the compounds. On the other hand, the complementarity of this new approach with high-resolution mass spectrometry will be investigated.

 

Retour en haut