Abstract: Conventionally, an electrolyte composition made from a conductive polymer and an ionic liquid possibly has poor durability (particularly impedance characteristics) in a case where the electrolyte composition is used in a conductive polymer capacitor. The present invention provides an electrolyte composition having excellent durability, by using an ionic liquid that includes carboxylic acid as its anion component. Moreover, the carboxylic acid is preferably one which includes a hydroxyl group, or is preferably an amino acid. Moreover, the electrolyte composition is preferably made of (A) a polymer component of a conductive polymer and (B) an ionic liquid. Moreover, the electrolyte composition preferably includes an ammonium salt, an amine salt, a quaternary ammonium salt or like salts.

Abstract: A welding arrangement for plastic components includes a base member, a primary member abutting onto the base member and provided with a first positioning feature that engages a corresponding first positioning feature provided on the base member. A secondary member is vibration welded to the base member so as to at least partly interpose the primary member between the secondary member and base member. Because the welding is performed while the primary member is properly positioned relative to the base member on account of the first positioning feature cooperating with the corresponding first positioning feature, the positional precision of the primary member is ensured. The primary member may be additionally provided with a second positioning feature that engages a corresponding second positioning feature provided on the secondary member, so as to permit positional adjustment between them in a prescribed direction corresponding to a direction of movement of the vibration welding.

Abstract: A solid electrolytic capacitor having an electrolytic layer containing at least two types of ionic liquids and a conductive polymer is provided. Preferably, the ionic liquids include at least one type of ionic liquid for supplying an excellent impedance characteristic and at least one type of ionic liquid for supplying an excellent withstand voltage characteristic. Thus, a solid electrolytic capacitor exhibiting a high withstand voltage and an excellent impedance characteristic can be obtained.

Abstract: Conventionally, an electrolyte composition made from a conductive polymer and an ionic liquid possibly has poor durability (particularly impedance characteristics) in a case where the electrolyte composition is used in a conductive polymer capacitor. The present invention provides an electrolyte composition having excellent durability, by using an ionic liquid that includes carboxylic acid as its anion component. Moreover, the carboxylic acid is preferably one which includes a hydroxyl group, or is preferably an amino acid. Moreover, the electrolyte composition is preferably made of (A) a polymer component of a conductive polymer and (B) an ionic liquid. Moreover, the electrolyte composition preferably includes an ammonium salt, an amine salt, a quaternary ammonium salt or like salts.

Abstract: A method is described for manufacturing a conductive polymer electrolytic capacitor. The method includes a step of aging a capacitor element including an electrolyte containing a conductive polymer and an ionic liquid by applying an aging voltage y (V) to the capacitor element to satisfy the following formula (1) or the following formula (2). In the following formulae (1) and (2), x represents a forming voltage for a valve metal. An electrolytic capacitor having a high withstand voltage is implemented by this method. 0.5x?y?x(0<x?48)??(1) 24?y?x(48<x)??(2).

Abstract: The welding arrangement for plastic components comprises a base member (1), a primary member (12) abutting onto the base member, the primary member being provided with a first positioning feature (21, 22) that engages a corresponding first positioning feature (61a, 62a) provided on the base member and a secondary member (13) vibration welded to the base member so as to at least partly interpose the primary member between the secondary member and base member. Because the welding is performed between the base member and the secondary member while the primary member is properly positioned relative to the base member on account of the first positioning feature cooperating with the corresponding first positioning feature, the welding can be favorably performed without being obstructed of the oscillatory movement required for the welding process while the positional precision of the primary member is ensured.

Abstract: A solid electrolytic capacitor having an electrolytic layer containing at least two types of ionic liquids and a conductive polymer is provided. Preferably, the ionic liquids include at least one type of ionic liquid for supplying an excellent impedance characteristic and at least one type of ionic liquid for supplying an excellent withstand voltage characteristic. Thus, a solid electrolytic capacitor exhibiting a high withstand voltage and an excellent impedance characteristic can be obtained.

Abstract: A method of manufacturing a conductive polymer electrolytic capacitor comprising the step of aging a capacitor element including an electrolyte containing a conductive polymer and an ionic liquid by applying an aging voltage y (V) to the capacitor element to satisfy the following formula (1) or the following formula (2) is provided. In the following formulas (1) and (2), x represents a forming voltage for a valve metal. An electrolytic capacitor having a high withstand voltage is implemented by this method. 0.

Abstract: An electrode composite body including a conductive polymer film in which the doping and dedoping capacities of the conductive polymer are improved, an electrolyte, and a redox capacitor including those are provided. The object is achieved by the followings: (1) an electrode composite body including a conductive polymer and an electrode for redox capacitors; (2) an electrode composite including a conductive polymer film and an electrode body for redox capacitors; (3) an electrolyte for redox capacitors that contains an ionic liquid as an essential component; (4) a redox capacitor composed of an electrolyte containing an ionic liquid as an essential component and an electrode composite body for redox capacitors; and (5) a composite body in which the anionic component contained in the ionic liquid and is the same component as a part of the dopant of the conductive polymer.

Abstract: The present invention relates to a positive electrode active material, a negative electrode active material and an electrolyte that are used alone or in combination to improve charge and discharge cycle characteristic, low temperature characteristic and safety of a non-aqueous electrolyic secondary battery, particularly a lithium ion secondary battery. Specifically, a particulate Li-transition metal composite oxide having an average particle size of not less than 10 &mgr;m, wherein [20/(specific surface area×average particle size)]=7-9, is used as a positive electrode active material.