Electrolyte solution for double-layered capacitors and...

H - Electricity – 01 – G

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H01G 9/038 (2006.01)

Patent

CA 2575886

The invention relates to an electrolyte solution for double-layered capacitors comprising at least one conductor salt which comprises a cation having a maximum diameter of < 9,20 ~ having additional substituents on the central atom which are not equal. Also, comprising at least one solution which contains a functional group which is selected from lactones and nitriles. Said type of electrolyte solutions have, compared to traditional electrolyte solutions, improved behaviour at low temperatures when acetonitrile is selected as a solvent such that the double-layered capacitors provided for the inventive electrolyte solutions have improved electric properties at low temperatures.

L'invention concerne une solution électrolytique destinée à des condensateurs à double couche et contenant au moins un sel conducteur qui comprend un cation ayant un diamètre maximal inférieur à 9,20 Å et présentant en outre sur l'atome central des substituants qui ne sont pas tous identiques. La solution électrolytique selon l'invention contient également au moins un solvant qui présente un groupe fonctionnel sélectionné parmi les lactones et les nitriles. De telles solutions électrolytiques présentent, par rapport aux solutions électrolytiques traditionnelles, un comportement amélioré à basses températures lorsque l'acétonitrile est choisi comme solvant, de sorte que les condensateurs à double couche munis des solutions électrolytiques selon l'invention présentent des propriétés électriques améliorées à basses températures.

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