Matsushita Electric Industrial Co., Ltd.

Sanyo Chemical Industries, Ltd.

Katsuji Shiono

Hideki Shimamoto

Keiji Mori

Takaaki Kishi

Yukihiro Nitta

Hisao Nagara

Yuichiro Tsubaki

Hiroyuki Matsuura

Shingo Yoshida

Yoshiteru Kuwae

Noriki Ushio

Nobuhiro Takeishi

Yukari Washio

Hideo Samura

Tomoharu Nakano

An electrochemical device of the present invention includes: a main body formed by rolling up an anode foil, a cathode foil and a separator disposed therebetween, each of the anode foil and the cathode foil having a lead wire connected thereto, wherein the main body is impregnated with an electrolytic solution; a tubular case having a bottom surface for accommodating the main body; and a seal for sealing an opening of the tubular case, which includes a through hole for the lead wire to pass therethrough. The electrolytic solution contains about 5 to about 100 parts by weight of a quaternary salt of a compound having an alkyl-substituted amidine group as an electrolyte with respect to 100 parts by weight of an organic solvent containing at least one of &ggr;-butyrolactone and propylene carbonate. The seal is an elastic body containing a butyl rubber polymer which is a copolymer of isobutylene, isoprene and divinylbenzene, and a peroxide as a vulcanizing agent. At least a portion of the seal has a hardness of about 65 International Rubber Hardness Degrees.

Electrochemical device

An electrochemical device of the present invention includes: a main body formed by rolling up an anode foil, a cathode foil and a separator disposed therebetween, each of the anode foil and the cathode foil having a lead wire connected thereto, wherein the main body is impregnated with an electrolytic solution; a tubular case having a bottom surface for accommodating the main body; and a seal for sealing an opening of the tubular case, which includes a through hole for the lead wire to pass therethrough. The electrolytic solution contains about 5 to about 100 parts by weight of a quaternary salt of a compound having an alkyl-substituted amidine group as an electrolyte with respect to 100 parts by weight of an organic solvent containing at least one of &ggr;-butyrolactone and propylene carbonate. The seal is an elastic body containing a butyl rubber polymer which is a copolymer of isobutylene and isoprene, and an alkylphenol formalin resin as a vulcanizing agent. At least a portion of the seal has a hardness of about 75 International Rubber Hardness Degrees.

The present invention relates to an electrolyte for use in electronic components and electrolytic capacitors in which said electrolyte is used; including as a solute, a quaternary salt of a compound having a N,N,N'-substituted amidine group, such as 1-methylimidazole, 1-methylbenzoimidazole, 1,2-dimethylimidazoline, 1,2-dimethyl-1,4,5,6-tetrahydropyrimidin e, 1,8-diazabicyclo�5.4.0!undecene-7,1,5-diazabicyclo �4.3.0!nonene-5 and the like. The electronic components such as electrolytic capacitors and electrochromic display devices, using this electrolyte, have an excellent thermostability, high specific conductivity, and do not degrade or corrode metal, resin or rubber.

Electrolyte and electronic component using same

Fluorine-containing dioxolane compounds and electrolytic solution compositions containing the fluorine-containing dioxolane compounds are disclosed. Lithium secondary batteries or electric double layer capacitors, having various improved characteristics such as improved charge and discharge cycle life or improved durability over a long period of time can be obtained by using the electrolytic solution compositions.

Fluorine-containing dioxolane compound, electrolytic solution

This invention relates to an electrolyte for use in electrolytic capacitors and also to an electrolytic capacitor using the electrolyte. The solute for the electrolyte is a quaternary ammonium salt of either a carboxylic acid selected from the group consisting of phthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid and maleic acid, or an alkyl or nitro-substituted compound of the acid. The electrolytic capacitor has improved low temperature characteristics and an improved variation in characteristics at high temperatures in relation to time with a prolonged life.

Electrolyte for electrolytic capacitors and electrolytic capacitor using

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.

Electrolyte for driving electrolytic capacitors and capacitor using the

An electrolyte for use in electrolytic capacitors is provided. The electrolyte comprises a specified quaternary ammonium salt of a boric acid complex as a solute. A capacitor in which the electrolyte is used displays stable electrical characteristics at high temperatures as well as high sparking voltage and long life.

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Otsu, Japan

Katsuji Shiono