Electric double layer capacitor
AssigneePanasonic Corporation
InventorsChiho Yamada, Yoshinori Takamuku, Motohiro Sakata
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Abstract
An electric double layer capacitor includes a positive electrode, a negative electrode which faces the positive electrode and is isolated therefrom, and an electrolyte solution. The positive electrode includes a first current collector of a metal foil and a first polarizable electrode layer on the first current collector, the first polarizable electrode layer containing a phosphorus compound. The negative electrode includes a second current collector of a metal foil and a second polarizable electrode layer on the second current collector. The electrolyte solution, with which the first and second polarizable electrode layers are impregnated, has fluorine-containing anions as an electrolyte solute.
Claims9
An electric double layer capacitor comprising:
- a positive electrode including:
- a first current collector made of a metal foil;
- and
- a first polarizable electrode layer on the first current collector, the first polarizable electrode layer containing a phosphorus compound, wherein the first polarizable layer comprises a first phosphorus-containing region and a second phosphorus-containing region that is located a greater distance from the first current collector than the first phosphorus-containing region, and a content of the phosphorus compound in the first phosphorus-containing region is higher than a content of the phosphorus compound in the second phosphorus-containing region;
- a negative electrode facing the positive electrode and being electrically insulated therefrom, the negative electrode including:
- a second current collector made of a metal foil;
- and
- a second polarizable electrode layer on the second current collector;
- and
- an electrolyte solution having fluorine-containing anions as an electrolyte solute, the first polarizable electrode layer and the second polarizable electrode layer being impregnated with the electrolyte solution.
Dependencies are inferred from the claim text.