Li/S accumulators : Electrochemical mechanism investigation using operando analysis by absorption and X-Ray diffraction tomography

Abstract : The main objective was to identify the degradations phenomena and the limiting processes occurring while cycling Li/S accumulators to therefore put in relation the electrode morphology, the cell design, the electrochemical performances and the degradations phenomena. A new design of operando cell has been developed to be suitable with ESRF experiments. Operando Absorption and X-ray Diffraction tomography technics were performed. Thanks to both technics, the morphological changes and transport limitation kinetics along the 3D positive electrode have been evidenced. In addition, the lithium electrode/electrolyte interface has been characterized and heterogeneous stripping/plating has been evidenced, leading to low electrochemical performances while cycling.
Complete list of metadatas

Cited literature [192 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02284930
Contributor : Abes Star <>
Submitted on : Thursday, September 12, 2019 - 12:01:07 PM
Last modification on : Saturday, September 14, 2019 - 1:09:00 AM

File

TONIN_2019_diffusion.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02284930, version 1

Collections

Citation

Guillaume Tonin. Li/S accumulators : Electrochemical mechanism investigation using operando analysis by absorption and X-Ray diffraction tomography. Chemical and Process Engineering. Université Grenoble Alpes, 2019. English. ⟨NNT : 2019GREAI036⟩. ⟨tel-02284930⟩

Share

Metrics

Record views

248

Files downloads

61