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Étude du silicium et du germanium sous forme de couche mince en tant qu'électrode négative de (micro)accumulateur lithium-ion

Abstract : Silicon which has a theoretical capacity of 3579 mAh.g-1 and low insertion/deinsertion potentials is one of the most promising candidates to replace graphite as a negative electrode in lithium-ion batteries. Moreover, silicon could replace lithium in microbatteries to make them compatible with the solder-reflow. However, this high capacity associated with a dense material leads to high volumetric variations which are a starting point to various issues resulting in poor cycle performances. During this thesis, electrochemical behavior of silicon is evaluated on thin films electrodes. This allows avoiding the use of binder and charges, and it leads to better cycle performances which emphasizes slow phenomenon, not yet measurable on conventional composite electrode.
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https://tel.archives-ouvertes.fr/tel-01129147
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Submitted on : Wednesday, March 4, 2015 - 1:54:24 PM
Last modification on : Monday, December 13, 2021 - 9:42:19 AM
Long-term archiving on: : Friday, June 5, 2015 - 10:45:31 AM

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Michel Ulldemolins. Étude du silicium et du germanium sous forme de couche mince en tant qu'électrode négative de (micro)accumulateur lithium-ion. Matériaux. Université de Bordeaux 1, 2013. Français. ⟨NNT : 2013BOR14944⟩. ⟨tel-01129147⟩

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