Electrolyte for driving electrolytic capacitors and capacitor using the same
AssigneesMatsushita Electric Industrial Co., Ltd., Sanyo Chemical Industries, Ltd.
InventorsHisao Nagara, Hideki Shimamoto, Keiji Mori, Noriki Ushio, Katsuji Shiono, Takaaki Kishi
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Abstract
An electrolyte for driving electrolytic capacitors and electrolytic capacitors using the electrolyte are described. The electrolyte comprises at least one quaternary ammonium salt of aliphatic saturated dicarboxylic acid having from 6 to 10 carbon atoms in total or a quaternary ammonium salt of glutaric acid, dissolved in a solvent comprised of an aliphatic polyol. When applied to an electrolytic capacitor, the electrolyte ensures improvements in loss characteristic and high temperature characteristics with time. Thus, the capacitor has a prolonged life.
Claims46
An electrolyte for driving electrolytic capacitors which comprises at least one compound selected from the group consisting of quaternary ammonium salts of aliphatic saturated dicarboxylic acids having from 6 to 10 carbon atoms and dissolved in a solvent which comprises not less than 50 wt % of an aliphatic polyol.
An electrolyte for driving electrolytic capacitors which comprises a quaternary ammonium salt of glutaric acid dissolved in a solvent which comprises not less than 50 wt. % of an aliphatic polyol.
An electrolytic capacitor which comprises an element having an anode electrode and a cathode electrode which are facing each other through a separator provided between the anode electrode and the cathode electrode, said separator being impregnated with an electrolyte which comprises at least one compound selected from the group consisting of quaternary ammonium salts of aliphatic saturated dicarboxylic acids having from 6 to 10 carbon atoms and dissolved in a solvent which comprises not less than 50 wt. % of an aliphatic polyol.
An electrolytic capacitor which comprises an element having an anode electrode and a cathode electrode which are facing each other through a separator provided between the anode electrode and the cathode electrode, said separator being impregnated with an electrolyte which comprises a quaternary ammonium salt of glutaric acid dissolved in a solvent which comprises not less than 50 wt. % of an aliphatic polyol.
Dependencies are inferred from the claim text.