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Nouveaux matériaux d’électrodes pour microbatteries au sodium

Abstract : As the next generations of microbatteries are expected to power microelectronics devices working at lower voltages, we address the elaboration and characterization of electrode materials for sodium microbatteries. The described materials were selected according to several criterions including their working potentials and insertion mechanisms. For each material, the deposition of thin films was performed using RF magnetron sputtering, the deposition parameters being optimised in order to reach the targeted properties and to highlight the special features of thin film electrodes. The study of the intercalation compound Fe2(MoO4)3 shows the differences in mechanism between Li and Na insertion; while the alloying compound Bi undergoes parasitic electrolytic reactions. Our work also addresses two sulphides: the conversion compound FeS2 and the new layered material Na2TiS3.
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Vincent Pelé. Nouveaux matériaux d’électrodes pour microbatteries au sodium. Matériaux. Université de Bordeaux, 2016. Français. ⟨NNT : 2016BORD0264⟩. ⟨tel-01654419⟩

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