Rechargeable electrochemical accumulator

H - Electricity – 01 – M

Patent

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Details

H01M 10/0565 (2010.01) H01M 10/058 (2010.01) H01M 4/131 (2010.01) H01M 4/134 (2010.01) H01M 4/136 (2010.01) B60L 11/18 (2006.01)

Patent

CA 2514783

The invention relates to a metallic lithium rechargeable electrochemical accumulator, comprising at least one lithium metal electrode and at least one polymeric electrolyte gel. Said accumulator is capable of operating at temperatures from - 20 to 60 ·C, essentially without formation of lithium dendrites on the whole surface of the metallic lithium electrode. The above is also characterised by a particularly long life, even with intensive use at low temperature. Said inventive rechargeable accumulator can be produced by use of a production method with particular application of temperature control during the specific production stages. As a result of the extremely high electrochemical performance of said accumulator, in particular the remarkable stability thereof, said accumulator can be used in new application fields such as hybrid vehicles, electric vehicles and emergency supply systems such as those of the UPS type.

Un générateur électrochimique rechargeable au lithium métallique comportant au moins une électrode de type lithium métallique et au moins un électrolyte polymère gel. Ce générateur est capable d'opérer à des températures comprises entre - 20 et 60 ~ Celsius, substantiellement sans formation de dendrites de lithium sur la surface totale d'électrode de type lithium métallique. Il se caractérise aussi par une durée de vie remarquable même en utilisation intensive à basse température. Ce nouveau générateur rechargeable peut être obtenu par mise en oeuvre d'un procédé de fabrication impliquant notamment un contrôle des températures appliquées dans des étapes spécifiques de la fabrication. En raison de son niveau très élevé de performances électrochimiques, en particulier de sa stabilité remarquable, ce générateur est utilisable dans de nouveaux domaines d'application tels que les véhicules hybrides, les véhicules électriques et les systèmes d'alimentation d'urgence, par exemple ceux de type UPS.

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