Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Sanyo Chemical Industries, Ltd.

Yasuyuki Ito

Nao Matsumura

Eri Hirose

Hiroyuki Yanagisawa

Satomi Onishi

Hiroki Hayashi

Takumi Yamaguchi

Nario Niibo

Yukiyasu Sugihara

Hiroyuki Maeshima

Susumu Nomoto

Masayuki Sato

Mitsuhiro Fujita

Koji Fujioka

Yusuke Nakamura

Motohiro Sakata

Shigetaka Furusawa

Kiyohiro Isii

Masashige Ashizaki

Takao Mukai

Yoshinori Takamuku

Takuma Asari

Yoshihiko Akazawa

Koichi Morikawa

Hideo Sakata

Chiho Nobumori

Ichiro Aoki

Kouji Moriyama

Yoshiki Hashimoto

Kiyohiro Ishii

Mitsuru Iwai

Tougo Endou

Makoto Akutsu

Shohei Masuda

A negative electrode for an electrochemical device includes a negative electrode core material and a negative electrode material layer supported on the negative electrode core material. The negative electrode material layer contains a carbon material. A surface layer portion of the negative electrode material layer includes a first layer containing lithium carbonate and a second layer containing a solid electrolyte. At least a portion of the second layer covers at least a portion of the surface of the carbon material with the first layer interposed therebetween.

Negative electrode for electrochemical device, and electrochemical device

An electrochemical device of the present invention includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The positive electrode includes a positive current collector containing aluminum, a positive electrode material layer containing a conductive polymer, and an aluminum oxide layer disposed on a surface of the positive current collector. The aluminum oxide layer contains fluorine.

Electrochemical device and method for manufacturing electrochemical device

A method for manufacturing an electrochemical device includes the following steps: a step of preparing a positive electrode, the positive electrode including a first current collector and a positive electrode layer containing a conductive polymer; a step of preparing a negative electrode, the negative electrode including a second current collector and a negative electrode layer; and a step of sealing the positive electrode, the negative electrode, and an electrolytic solution in an exterior body. The step of preparing the positive electrode includes a step of holding the positive electrode in depressurized atmosphere and then introducing gas containing COas a primary component into the depressurized atmosphere.

Method for manufacturing electrochemical device, and electrochemical device

An electrochemical device positive electrode with a lead member includes a positive electrode and a lead member attached to the positive electrode. The positive electrode includes a positive current collector, a carbon layer, and an active layer. The carbon layer is disposed on a surface of the positive current collector, and contains a conductive carbon material. The active layer is supported by the positive current collector via the carbon layer disposed between the active layer and the positive current collector, and contains a conductive polymer. The lead member is in contact with the carbon layer.

Positive electrode with lead member for electrochemical devices, method for producing same and electrochemical device

A method for manufacturing a positive electrode for a power storage device includes the steps of: preparing a current collector that includes a first region and a second region on a surface of the current collector, the first region having a carbon layer formed on the surface, the second region having the surface exposed; and forming a conductive polymer layer selectively on a surface of the carbon layer by immersing the current collector in an electrolytic solution containing a raw material monomer and then conducting electrolytic polymerization of the raw material monomer.

Method for manufacturing positive electrode including conductive polymer layer selectively formed on surface of carbon layer disposed on current collector for power storage device, and method for manufacturing power storage device

An object of the present invention is to provide a capacitor excellent in reliability, of which charge-discharge characteristics are hardly deteriorated. The capacitor of the present invention includes: a capacitor element including a positive electrode and a negative electrode; and a case that stores the capacitor element together with an electrolytic solution, wherein at least one of the positive electrode and the negative electrode contains activated carbon, and a sum of volumes per unit weight of pores having a pore diameter of from 30 &#x212b; to 100 &#x212b; inclusive among pores of the activated carbon is 0.2 cm/g or more.

Capacitor

An electrolytic solution for electric double layer capacitors includes an organic solvent and quaternary ammonium salt dissolved in the organic solvent. The organic solvent consists of sulfolane and chain sulfone. The quaternary ammonium salt is at least one of diethyl dimethyl ammonium salt and ethyl trimethyl ammonium salt.

Electrolyte solution for electric double layer capacitors, and electric double layer capacitor

A capacitor electrode includes a substrate having electrical conductivity, a conductive layer formed on a surface of the substrate, and an electrode layer formed on the conductive layer. The electrode layer is allowed to adsorb and desorb ions on a surface thereof. The conductive layer contains flake graphite. A density of the conductive layer is greater than 1.1 g/cm. An average particle size Dof the flake graphite, which is measured by using a dynamic light scattering method, is less than or equal to 10 &#x3bc;m.

Capacitor electrode and capacitor using same

A capacitor includes a capacitor element and an electrolyte containing a lactone compound. At least one of a positive electrode and a negative electrode of the capacitor element contains activated carbon Entire surface functional group amount D (meq/g/nm) in an average sectional area of pores of the activated carbon is calculated at 0.152 or less by the following equation:

An electric double layer capacitor has an element, a first terminal, a second terminal, a resin-made case, and a resin-made lid. A pair of electrodes are led out of the element. Each of the electrodes is connected to each of the first terminal and the second terminal. The element and an electrolyte are accommodated in the case having an opening top surface, and the lid is bonded to the top surface of the case. The joints of the first and second terminals are disposed at positions higher than the inner bottom of the case, and are exposed upward. The rims of the joints and intermediate conductive sections continuing from them are buried in the case, and the terminal sections continuing from the intermediate conductive sections are led from the side surface of the case to the outside.

Electric double layer capacitor having a first terminal having a first joint and a second terminal having a second joint

A capacitor has a capacitor element, an open-topped case on which terminals joined to a pair of electrode lead sections of the capacitor element are disposed facing each other, and a cover combined with the open surface of the case. Each terminal has a pair of intermediate conductive sections and a pair of terminal sections. The joint has a joint surface to which one of the electrode lead sections of the capacitor element is joined. The intermediate conductive sections are L-shaped, and are extendedly disposed in directions opposite to each other from both ends of the joint. The terminal sections are disposed further extendedly from the intermediate conductive sections and placed symmetrically about the joint.

The present invention has for its object to provide an electrolyte solution which can dramatically suppress the time degradation in performance of an electrochemical device, especially an electrochemical capacitor. The present invention relates to (in the formula, R, Rand Rmay be the same or different and each represents an alkyl group containing 1 to 3 carbon atoms; Rand Rmay be the same or different and each represents an hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and Xrepresents a counter anion) (in the formula, R, R, R, Rand Xare the same as the definition for the general formula (1)).

Electrolyte solution for electrochemical device and electrochemical device using same

A wound electric double-layer capacitor suppresses electrochemical reaction on polarized electrode layers, reduces characteristic degradation, and has high reliability. The capacitor has a capacitor element formed by winding positive and negative electrodes with a separator interposed between them, a metal case for storing the capacitor element and an electrolyte for driving, and a sealing member for sealing an opening of the metal case. In the positive and negative electrodes, positive and negative electrode lead wires are coupled to exposed parts of current collectors having polarized electrode layers on their both surfaces, respectively. The negative electrode is wound at least one extra turn from the winding end of the positive electrode of the capacitor element, and hence a part where the polarized electrode layers formed in the negative electrode face each other through the separator is formed on the outermost periphery of the capacitor element.

Wound electric double-layer capacitor

There is provided an electrolytic solution which may significantly improve performance deterioration with time of an electrochemical capacitor. There is provided an electrolytic solution, comprising an electrolyte salt (A) shown as the following formula (1). In the formula, 'R,' 'R,' and &#x201c;R&#x201d; independently represent an alkyl group having a carbon number of 1 to 3, &#x201c;R&#x201d; and &#x201c;R&#x201d; independently represent hydrogen atom or an alkyl group having a carbon number of 1 to 3, and &#x201c;X&#x201d; represents a counterpart anion. 

Electrolytic solution for an electrochemical capacitor and an electrochemical capacitor using the same

In an electric double-layer capacitor, resistance of a polarizable electrode layer is reduced and gas generation inside a case is suppressed in an attempt to improve reliability. On that account, an electric double-layer capacitor is provided, which is obtained by housing in a case, together with a driving electrolyte, a capacitor element wound with a separator interposed between electrodes being paired anode and cathode electrodes in each of which polarizable electrode layers are formed on and lead wires are fixed to both sides of a current collector made of metallic foil, such that the polarizable electrode layers are opposed to each other. Further, an electric double-layer capacitor is provided in which the lead wire is fixed to a polarizable-electrode-layer-removed section on the electrode where the polarizable electrode layer has been removed, and an area of the polarizable-electrode-layer-removed section is not smaller than 1 and not larger than 2.0 when a project area of a portion where the lead wire is connected with the current collector is set to 1.

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Osaka, Japan

Yasuyuki Ito