Abstract: The present invention relates to a solid electrolytic capacitor provided with a anode made of a metal or an alloy having valve action, a dielectric layer formed on the anode, and an electrolyte layer consisting of a conductive polymer layer formed so as to have contact with a portion of the region on the dielectric layer surface and a manganese dioxide layer formed so as to have contact with the other portion of the region on the dielectric layer surface.

Abstract: The present invention provides an electric double layer capacitor. An electric double layer capacitor element sandwiches a separator between a cathode and an anode, arranged inside a container comprising a concave shaped containing portion and lid. A first conductive layer on the inner bottom face of a containing portion is covered by an insulating layer, and opening portions formed on the insulating layer penetrate to the first conductive layer. A second conductive layer is formed on the insulating layer and inside the opening portions, and is connected to a cathode through a conductive adhesive. The first conductive layer penetrates through the side wall of the containing portion, and is connected to a connecting terminal. An anode is connected to a third conductive layer through a conductive adhesive, and a collector is connected to a connecting terminal by extending between the containing portion and the lid.

Abstract: The present invention relates to a solid electrolytic capacitor provided with a anode made of a metal or an alloy having valve action, a dielectric layer formed on the anode, and an electrolyte layer consisting of a conductive polymer layer formed so as to have contact with a portion of the region on the dielectric layer surface and a manganese dioxide layer formed so as to have contact with the other portion of the region on the dielectric layer surface.

Abstract: An electrochemical device includes a pair of electrodes at least containing activated carbon powder, a separator interposed between the pair of electrodes, and an electrolytic solution impregnated into the pair of electrodes and the separator. The electrodes and the separator are stacked on a collector. Each of the electrodes includes at least two layers arranged in a thickness direction, and the two layers are made of the activated carbon powder having mutually different average grain sizes. The average grain size of the activated carbon powder in the layer contacting the separator is greater than the average grain size of the activated carbon powder in the layer located on the collector side.

Abstract: The present invention provides an electric double layer capacitor that has less chance for internal resistance increase. For this objective, in this electric double layer capacitor, an electric double layer capacitor element sandwiches a separator between a cathode and an anode, arranged inside a container comprising a lid and a concave shaped containing portion. On the inner bottom face in the containing portion, an insulating layer having a first conductive layer connected to a connecting terminal, and an opening portion penetrates to the first conductive layer are formed, wherein a second conductive layer fills inside the opening portion. Onto the insulating layer and the second conductive layer, a third conductive layer which laminates a first layer comprised of aluminum and a second layer comprised of carbon, is formed and connected to the cathode. The fourth conductive layer is connected to the anode, and also connected to the connecting terminal.

Abstract: The present invention provides an electric double layer capacitor that has less chance for internal resistance increase. For this objective, in this electric double layer capacitor, an electric double layer capacitor element sandwiches a separator between a cathode and an anode, arranged inside a container comprising a lid and a concave shaped containing portion. On the inner bottom face in the containing portion, an insulating layer having a first conductive layer connected to a connecting terminal, and an opening portion penetrates to the first conductive layer are formed, wherein a second conductive layer fills inside the opening portion. Onto the insulating layer and the second conductive layer, a third conductive layer which laminates a first layer comprised of aluminum and a second layer comprised of carbon, is formed and connected to the cathode. The fourth conductive layer is connected to the anode, and also connected to the connecting terminal.

Abstract: The present invention provides an electric double layer capacitor. An electric double layer capacitor element sandwiches a separator between a cathode and an anode, arranged inside a container comprising a concave shaped containing portion and lid. A first conductive layer on the inner bottom face of a containing portion is covered by an insulating layer, and opening portions formed on the insulating layer penetrate to the first conductive layer. A second conductive layer is formed on the insulating layer and inside the opening portions, and is connected to a cathode through a conductive adhesive. The first conductive layer penetrates through the side wall of the containing portion, and is connected to a connecting terminal. An anode is connected to a third conductive layer through a conductive adhesive, and a collector is connected to a connecting terminal by extending between the containing portion and the lid.

Abstract: The current invention provides for an electric double layer capacitor which can be manufactured with low manufacturing cost, and an increase of internal resistance due to the damage of a cathode current collector by reflow is inhibited. For this reason, in the current invention, the electric double layer capacitor comprising a cathode 1a, anode 1b, a separator 1c to separate said cathode 1a and anode 1b, electrolytic solution 7 and a container 10 to house said cathode 1a, anode 1b, separator 1c and electrolytic solution 7, wherein said cathode 1a is electrically connected to cathode current collector 2, and said cathode current collector 2 is comprised of alloy of a metal element showing an oxide passivation phenomenon and aluminum.

Abstract: An electric double layer capacitor includes: a cell which includes a pair of polarizable electrodes impregnated with an electrolytic solution and disposed in opposed relation with a separator interposed therebetween; collector electrodes respectively attached to the polarizable electrodes; and a sealing member of a synthetic resin which seals a periphery of the cell. The collector electrodes extend outward of the sealing member through the sealing member in contact with the sealing member. The collector electrodes each have a rough surface portion which extends through the sealing member.

Abstract: An electric double layer capacitor comprises: a cell which includes a pair of polarizable electrodes impregnated with an electrolytic solution and disposed in opposed relation with a separator interposed therebetween; collector electrodes respectively attached to the polarizable electrodes; and a sealing member of a synthetic resin which seals a periphery of the cell. The collector electrodes extend outward of the sealing member through the sealing member in contact with the sealing member. The collector electrodes each have a rough surface portion which extends through the sealing member.

Abstract: An electrochemical device includes a pair of electrodes, an electrolytic solution, and a container for containing the pair of electrodes and the electrolytic solution. The container includes a frame body having concave shape and a sealing plate configured to seal an opening of the frame body, and an electronic device is buried in the frame body or the sealing plate.

Abstract: An electrochemical device includes a pair of electrodes at least containing activated carbon powder, a separator interposed between the pair of electrodes, and an electrolytic solution impregnated into the pair of electrodes and the separator. The electrodes and the separator are stacked on a collector. Each of the electrodes includes at least two layers arranged in a thickness direction, and the two layers are made of the activated carbon powder having mutually different average grain sizes. The average grain size of the activated carbon powder in the layer contacting the separator is greater than the average grain size of the activated carbon powder in the layer located on the collector side.

Abstract: A method of producing a hydrogen storage alloy, for use in alkaline storage batteries, includes two steps. A first step involves preparing alloy particles having a CaCu5-type crystal structure and the compositional formula MmNixCoyMnzM1?z, wherein M represents at least one element selected from the group consisting of aluminum (Al) and copper (Cu), 3.0?x?5.2, 0?y?1.2, 0.1?z?0.9, and 4.4?x+y+z?5.4. A second step involves immersing the alloy particles in an acid treating solution containing a cobalt compound and a copper compound, each in the amount of 0.1 to 5.0% by weight based on the weight of the alloy particles, and an organic additive to remove oxide films from and to reductively deposit cobalt and copper on a surface of each alloy particle to form a surface region surrounding a bulk region and having a graded composition. When the sum in percentage of numbers of cobalt (Co) atoms and copper (Cu) atoms present in the surface region is given by a and that in the bulk region by b, the relationship a/b?1.

Abstract: A method of producing a hydrogen storage alloy, for use in alkaline storage batteries, includes two steps. A first step involves preparing alloy particles having a CaCu5-type crystal structure and the compositional formula MmNixCoyMnzM1−z, wherein M represents at least one element selected from the group consisting of aluminum (Al) and copper (Cu), 3.0≦x≦5.2, 0≦y≦1.2, 0.1≦z≦0.9, and 4.4≦x+y+z≦5.4. A second step involves immersing the alloy particles in an acid treating solution containing a cobalt compound and a copper compound, each in the amount of 0.1 to 5.0% by weight based on the weight of the alloy particles, and an organic additive to remove oxide films from and to reductively deposit cobalt and copper on a surface of each alloy particle to form a surface region surrounding a bulk region and having a graded composition.

Abstract: A hydrogen storage alloy, for use in alkaline storage batteries, having a CaCu5-type crystal structure and represented by the compositional formula MmNixCoyMnzMl-z (wherein M represents at least one element selected from the group consisting of aluminum (Al) and copper (Cu); x is a nickel (Ni) stoichiometry and satisfies 3.0≦x≦5.2; y is a cobalt (Co) stoichiometry and satisfies 0≦y≦1.2; z is a manganese (Mn) stoichiometry and satisfies 0.1≦z≦0.9; and the sum of x, y and z satisfies 4.4≦x+y+z≦5.4). The hydrogen storage alloy includes a bulk region having a CaCu5-type crystal structure and a substantially uniform composition and a surface region surrounding said bulk region and having a graded composition. When the sum in percentage of numbers of cobalt (Co) atoms and copper (Cu) atoms present in the surface region is given by a and that in the bulk region by b, the relationship a/b≧1.3 is satisfied.

Abstract: A hydrogen storage alloy electrode containing, as a principal active material, a powder of hydrogen storage alloy having a CaCu5 crystal structure and represented by the formula MmNixCoyMnzMw where M is at least one element selected from aluminum (Al) and copper (Cu), x is between 3.0 and 5.2, y is between 0 and 1.2, z is between 0.1 and 0.9, w is between 0.1 and 0.9, and the sum of x, y, z and w is between 4.4 and 5.4. The hydrogen storage alloy powder particles have a surface region and a bulk region enclosed within the surface region and have a higher nickel content in the surface region than in the bulk region. The hydrogen storage alloy electrode further contains an oxide and/or hydroxide of at least one rare-earth element selected from ytterbium (Yb), samarium (Sm), erbium (Er) and gadolinium (Gd).

Abstract: In the present invention, a hydrogen absorbing alloy obtained by sintering hydrogen absorbing alloy powder containing not less than 50% by weight of particles having a particle diameter of not more than 25 &mgr;m at a temperature of not more than 850° C. is used for a hydrogen absorbing alloy electrode for an alkali storage battery, and the hydrogen absorbing alloy electrode for an alkali storage battery is used as a negative electrode of the alkali storage battery.

Abstract: In the present invention, a hydrogen absorbing alloy containing at least nickel, cobalt and aluminum, in which the sum a of the respective abundance ratios of cobalt atoms and aluminum atoms in a portion to a depth of 30 Å from its surface and the sum b of the respective abundance ratios of cobalt atoms and aluminum atoms in a bulk region inside thereof satisfy conditions of a/b≧1.30, or a hydrogen absorbing alloy containing at least nickel, cobalt, aluminum and manganese, in which the sum A of the respective abundance ratios of cobalt atoms, aluminum atoms and manganese atoms in a portion to a depth of 30 Å from its surface and the sum B of the respective abundance ratios of cobalt atoms, aluminum atoms and manganese atoms in a bulk region inside thereof satisfy conditions A/B≧1.20 is used for a hydrogen absorbing alloy electrode in an alkali secondary battery.

Abstract: A hydrogen absorbing alloy electrode is provided which has an excellent oxygen gas absorbing capacity and further improved in charge-discharge cycle characteristics and high-rate discharge characteristics. The electrode contains a powder prepared by mixing a hydrogen absorbing alloy powder with a powder of at least one complex oxide selected from the group consisting of a ZrO2—Y2O3 solid solution, ZrO2—CaO solid solution, CeO2—Gd2O3 solid solution, CeO2—La2O3 solid solution, ThO2—Y2O3 solid solution, Bi2O3—Y2O3 solid solution, Bi2O3—Gd2O3 solid solution, Bi2O3—Nb2O3 solid solution and Bi2O3—WO3 solid solution. Preferably the electrode contains 0.1 to 10 wt. % of the complex oxide powder based on the combined amount of the two powders.

Abstract: A hydrogen absorbing alloy electrode is provided which is improved in hydrogen gas absorbing ability and in low-temperature discharge characteristics. The electrode contains a hydrogen absorbing alloy having a crystal structure of the CaCu5 type and represented by the stoichiometric ratio ABx, the hydrogen absorbing alloy being represented by MmNiaCobAlcMd wherein Mm is a misch metal, M is Mn and/or Cu, the atomic ratios a, b, c and d are in the respective ranges of 3.0≦a≦5.2, 0≦b≦1.2, 0.1≦c≦0.9, 0.1≦d≦0.8, wherein X is the sum of the atomic ratios a, b, c, and d, such that, X=a+b+c+d and, is in the range of 4.4≦X≦5.4. More specifically, the electrode contains a hydrogen absorbing alloy powder at least 5.0 in X, and a hydrogen absorbing alloy powder less than 5.0 in X.