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Theses

Mécanosynthèse en milieu liquide de composés graphite-lithium superdenses, de graphite très anisométrique et de maghémite supportée ou non sur graphite

Abstract : New anodic materials for lithium-ion batteries are prepared by ball-milling. In the case of the graphite-lithium compounds synthesis, an intercalation compound with a LiC3 stoechiometry is obtained by grinding in liquid media. The ball-milling is the first technique, which allows to prepare a compound richer in lithium than the classical LiC6 and stable under ambient conditions. Ball-milling of natural graphite in liquid media was also studied. The use of a planetary ball-mill allows to prepare very anisometric graphite particles (geometrical anisotropy around 100). This graphite is interesting from the electrochemical point of view, since the corresponding irreversible capacity during the first charge is low. Finally, maghemite ([gamma]Fe2O3) nanoparticles are synthesized by milling of iron powder within water. These grains are dispersed on anisometric graphite and the electrochemical properties of such composites are investigated.
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Theses
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http://docnum.univ-lorraine.fr/prive/SCD_T_2001_0173_JANOT.pdf
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Submitted on : Thursday, March 29, 2018 - 10:40:23 AM
Last modification on : Wednesday, March 24, 2021 - 10:24:04 AM

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Raphaël Janot. Mécanosynthèse en milieu liquide de composés graphite-lithium superdenses, de graphite très anisométrique et de maghémite supportée ou non sur graphite. Autre. Université Henri Poincaré - Nancy 1, 2001. Français. ⟨NNT : 2001NAN10173⟩. ⟨tel-01746565⟩

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