Electrolyte for electrolytic capacitor, electrolytic...

Details Electrolyte for electrolytic capacitor, electrolytic... Electrolyte for electrolytic capacitor, electrolytic...

2007-06-05

2007-06-05

Thomas, Eric W. (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Liquid electrolytic capacitor

C252S062200

Reexamination Certificate

active

10533234

ABSTRACT:
There are provided an aluminum electrolytic capacitor comprising an anode, a cathode comprising aluminum and an electrolytic solution containing an onium salt of fluorine-containing anion, wherein the electrolytic solution has a water concentration of 1% by weight or less, or wherein the cathode has a peak top of Al2p spectrum of 74.0 to 75.8 eV as measured by a method in which the surface of the cathode in the aluminum electrolytic capacitor heated at 125° C. for 50 hours is analyzed by X-ray photoelectron spectroscopy (XPS); an electrolytic solution for electrolytic capacitor comprising a quaternary cyclic amidinium tetrafluoroaluminate and a solvent and containing specific impurity compounds in a total amount of 0.6% by weight or less, and an electrolytic capacitor using the electrolytic solution; and a method for preparing an organic onium tetrafluoroaluminate which is advantageously used in an aluminum electrolytic capacitor.

REFERENCES:
patent: 5870275 (1999-02-01), Shiono et al.
patent: 6294289 (2001-09-01), Fanta et al.
patent: 0 684 620 (1995-11-01), None
patent: 10-32147 (1998-02-01), None
patent: 2003-137847 (2003-05-01), None

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