Abstract: A capacitor includes a metal case and a terminal plate. The metal case accommodates a capacitor element together with a driving electrolyte and is joined to one of the electrodes of the capacitor element at its inner bottom surface. The terminal plate is joined to the other electrode at its inner surface so as to seal the opening of the metal case. The terminal plate is provided with a pressure regulating valve also functioning as a driving-electrolyte filling hole. The pressure regulating valve includes a ring-shaped elastic member which is pressed into the wall formed on the terminal plate.

Abstract: The present invention provides an electrode material for an electric double layer capacitor which can provide an electric double layer capacitor having a low internal resistance and a large capacitance, a process for producing the same, and an electrode for an electric double layer capacitor and an electric double layer capacitor using the same. The electrode material of the present invention is characterized by comprising a carbonaceous material and an activated carbon, the carbonaceous material obtained by thermal-treating or activating a fullerene-containing soot or an extracted residue obtained by substantially extracting at least a part of fullerene from a fullerene-containing soot using a solvent. The electrode for an electric double layer capacitor and the electric double layer capacitor of the present invention is characterized by using the electrode material.

Abstract: Provided are an electric double-layer capacitor which can have a reduced internal resistance and an improved withstand voltage with a simple structure, and a method for manufacturing the capacitor. The electric double-layer capacitor uses an alloy of carbon and aluminum as a material of the electrode. The electrode is formed by applying carbon to an aluminum foil and heating the aluminum foil with carbon thereon to a temperature at which the aluminum foil and the carbon are alloyed.

Abstract: Provided are an electric double-layer capacitor which can have a reduced internal resistance and an improved withstand voltage with a simple structure, and a method for manufacturing the capacitor. The electric double-layer capacitor uses an alloy of carbon and aluminum as a material of the electrode. The electrode is formed by applying carbon to an aluminum foil and heating the aluminum foil with carbon thereon to a temperature at which the aluminum foil and the carbon are alloyed.

Abstract: An electrochemical capacitor comprising a pair of oxidation-reduction active electrodes and an electrolyte solution or an ion-conductive solid electrolyte between the electrodes, wherein the electrodes contain a specific copolymer, thereby providing the electrochemical capacitor high in energy density and excellent in heat-resistance and charge/discharge cycle features.

Abstract: Electric double layer capacitors having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/stryrene copolymer, giving an increased electrolyte ion difusion resistance are provided. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks. The polymer is useful for suppressing self discharge in electronic components, such as electric double layer capacitor, aluminum electrolytic capacitors, electro-chemical capacitor and secondary batteries.

Abstract: An electric double layer capacitors, are disclosed, having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/ styrene copolymer, giving an increased electrolyte ion difusion resistance. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks.

Abstract: Non-aqueous electrolytic solutions for capacitors which release a little gas, have excellent potential window of electrochemical stability and enable capacitors to show excellent charging/discharging cycle properties and safety performance, and capacitors containing such non-aqueous electrolytic solutions. The non-aqueous electrolytic solution for capacitors comprises an electrolytic solution containing at least one cyclic carbonic ester selected from specified compounds and an electrolyte.

Abstract: Non-aqueous electrolytic solutions for capacitor which release little gas and have excellent potential window of electrochemical stability, and which enable capacitors to have excellent charging/discharging cycle properties and safety performance, and capacitors containing such non-aqueous electrolytic solutions. Such non-aqueous electrolytic solutions for capacitors include an electrolyte selected from the group consisting of ammonium salts, phosphonium salts and amidine salts and a solvent for containing at least one phosphoric ester represented by the following formula (I): wherein, R1, R2 and R3, which may be the same or different, are an alkyl group, an unsaturated hydrocarbon group or an aryl group.

Abstract: 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.

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.

Abstract: 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.

Abstract: 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.

Abstract: Non-aqueous liquid electrolytes for electrolytic capacitors which comprise diazobicyclealkenes and/or salts thereof as a solute. The electrolytes are effective in improving low temperature and high temperature characteristics when applied as electrolytic capacitors. The capacitors using the electrolytes are also described.