Abstract: A method of producing an electrode plate used for a lithium secondary battery and a lithium secondary battery containing such an electrode plate. The electrode plate is produced by coating a coating slurry of an active material mixture agent added with oxalic acid on a collector, drying and pressing, so as to obtain an electrode plate improved in charge-discharge cycle characteristics when used in a lithium secondary battery.

Abstract: Provided is a hydrogen occlusion alloy suitable for a negative electrode material of a closed type nickel hydride secondary cell in which the increase of gas pressure in the cell during overcharging is prevented and self discharge in the open circuit state would be effectively inhibited, being represented by the following compositional formula: ANiaCobMncXd wherein A is a misch metal containing not more than 60% by weight of Ce, X is at least one element selected from the group consisting of Al, CU, Mo and Zn, and a, b, c and d are numbers satisfying the following relations: 0.4 <b<2.0, 0.ltoreq.c<0.2, 0.1<d<2.0, and 4.55<a+b+c+d<4.80.

Abstract: A lithium secondary battery including a negative electrode having has been inserted an active material at least one member selected from the group of metallic lithium, lithium alloys and materials which are capable of electrochemically occluding and releasing lithium ions; a positive electrode having an active material consisting of at least one compound which is capable of electrochemically occluding and releasing lithium ions; and an organic electrolyte. The solvent for the organic electrolyte is composed mainly of a mixture solvent prepared by mixing an organic solvent indicated by Formula I, 4-trifluoromethyl-1,3-dioxolane-2-one, and one or two selected from the group of organic solvents indicated by Formula II, 1-trifluoroethylmethyl carbonate, and an organic solvent indicated by Formula III, di-1-trifluorethyl carbonate, as mentioned below.

Abstract: Disclosed is a nickel electrode for secondary battery, which ensures high packing density of an active material and improvement in a efficiency factor of the active material. The nickel electrode comprises a current collector supporting an active mixture material containing Ni(OH).sub.2 powder and CoO powder and/or Co(OH).sub.2 powder as essential components, wherein said Co(OH).sub.2 powder and/or CoO powder are spherical or almost spherical in shape.

Abstract: Disclosed is a novel process for preparing a compound, in which materials difficult to prepare at low temperature can be prepared even if the temperature is such a low temperature as room temperature. In this process, a solid catalyst is disposed in a vessel, a sub-reaction field f is formed on the surface of the solid catalyst, and materials for reaction are supplied to the sub-reaction field f whereby the reaction is progressed to synthesize an objective compound.

Abstract: A carbon material composed of a layer structure and a turbostratic structure obtained by subjecting fluid coke to a graphitizing treatment is used as an active material for the negative electrode of a lithium secondary battery. The burning temperature in the graphitizing of the fluid code is preferably more than 2000.degree. C., and more preferably is more than 2500.degree. C. A lithium secondary battery using the above-mentioned active material for the negative electrode thereof is excellent in flatness of the electric potential and also has decreased capacity loss at the initial stage of charge and discharge cycles.

Abstract: An electrode for a rechargeable battery with a nonaqueous electrolyte is provided wherein the active material layer has a sufficient flexibility, the adhesion between the active material coating and the metal foil collector is good, none of peeling, falling, cracking and other unfavorable phenomena occur in the active material coating in the step of assembling a battery and excellent discharge characteristics can be developed. The electrode for a rechargeable battery with a nonaqueous electrolyte comprises a metal foil collector and, formed on at least a part of the metal foil collector, an active material layer comprising an active material and a cured reaction-curing binder as essential components.

Abstract: There is provided a battery activating method for an alkaline rechargeable battery, in which the capacity is not decreased even when the battery voltage is decreased by continuous load connection or self discharge. The temperature at the start of charging is set at 30.degree. to 80.degree. C. when activation is performed by charging the alkaline rechargeable battery having a nickel electrode, in which the powder of divalent cobalt compound, for example, CoO powder is contained in an active substance mixture, as a positive electrode.

Abstract: A storage battery-based DC power supply system with continuous float charging adapted to automatic continuous recharging of storage battery connected to load is disclosed. Selective recharging at the full-charge voltage and float charging voltage is performed in response to the accumulated ampere-hour value of discharge current from the storage battery, when such value reaches a predetermined threshold value set to prevent excessive recharging, which can damage storage battery.

Abstract: A pocket type separator for an electrode of storage battery, such separator having a bottom, closed left and right side edges and an open top side. The inner surfaces of front and rear sides of the pocket facing each other include a plurality of parallel, vertical, widthwise spaced ribs in middle regions constituting most of the facing surfacer and a plurality of intersectant vertically spaced ribs on the Widthwise left and right side end portions of the facing surfaces and intersecting front and rear corner edge portion of opposite side edges of an electrode plate contained in the packet type separator.

Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode and an organic electrolyte, and the electrolyte comprises a solvent mixture of at least one kind of fluorine substituted propylene carbonates used as a first solvent and at least one kind of low viscous solvents for lowering the viscosity of fluorine substituted propylene carbonates, used as a second solvent. At least one solvent selected from a group of dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, methyl propyl carbonate and methyl butyl carbonate is preferably used as the second solvent.

Abstract: A stepped insulating ring having a large-diameter upper portion, a small-diameter foot portion, and a step portion formed on the inside is inserted from a top opening of a bottomed cylindrical can containing a plate group and electrolyte and the small-diameter foot portion is set onto the plate group,a peripheral portion of a cover in which a safety valve is incorporated is set onto the step portion of the stepped insulating ring, and the areas to be sealed where an inside wall of top opening of the bottomed cylindrical can faces an outside wall of the large-diameter upper portion of the stepped insulating ring and an inside wall of the large-diameter upper portion faces a peripheral portion of the cover is formed, andwhen crimping operation on said areas to be sealed is performed from the outside of the upper part of the bottomed cylindrical can to form a closed construction,a sealing compound consisting of oily bitumen, organic solvent, and paraffin base oil is applied to the areas where an inside wall of t

Abstract: A sealed storage battery has a sealing assembly including a hollow rivet mounted to a cover plate via a gasket and a lead piece connecting a positive collector to the hollow rivet. Mounting the hollow rivet to the cover plate is achieved by pressurizing a distal end portion of a hollow shaft of the hollow rivet with a punch having a conical tip end portion so as to caulk the distal end portion of the hollow rivet by enlarging the distal end portion diametrically outward. Tightness between the opposing surfaces of the members among the cover plate, hollow rivet, gasket and lead piece can be enhanced, providing excellent liquid leakage resistance in the battery. A valve body of a safety valve is housed in a positive terminal welded to the head of the hollow rivet.

Abstract: There is provided a nickel electrode for an alkaline secondary battery, in which the coefficient of use of nickel hydroxide, which is an active substance, is high, the swell restricting effect is high, and the charging/discharging cycle life characteristic is high. The nickel electrode is formed by filling a conductive, porous substance of a three-dimensional network structure with a mixture containing an active substance consisting mainly of nickel hydroxide. The nickel hydroxide is such that, when thermogravimetric analysis is performed at a heating rate of 10.degree. C./min and the TG curve is plotted, the value obtained by subtracting the weight decrease percentage at a temperature of T.degree.C. at which the DTG curve, the differential curve of the TG curve, turns to an upward curve from the weight decrease percentage of the nickel hydroxide at a temperature of 100.degree. C. is 0.6 to 1.5%.

Abstract: A sealed storage battery has a sealing assembly including a hollow rivet mounted to a cover plate via a gasket and a lead piece connecting a positive collector to the hollow rivet. Mounting the hollow rivet to the cover plate is achieved by pressurizing a distal end portion of a hollow shaft of the hollow rivet with a punch having a conical tip end portion so as to caulk the distal end portion of the hollow rivet by enlarging the distal end portion diametrically outward. Tightness between the opposing surfaces of the members among the cover plate, hollow rivet, gasket and lead piece can be enhanced, providing excellent liquid leakage resistance in the battery. A valve body of a safety valve is housed in a positive terminal welded to the head of the hollow rivet.

Abstract: Provided are a method for preparing a nickel hydroxide for a nickel electrode, which comprises solidly dissolving ions of other metals than nickel in a nickel hydroxide, and eluting a partial amount of the metal, a method for manufacturing a nickel electrode, which comprises filling a porous current collector with an active material paste consisting mainly of the resulting nickel hydroxide, and an alkaline secondary battery which incorporates the nickel electrode as a positive electrode therein. This nickel hydroxide restrains deformation or expansion of the nickel electrode and lowering of the discharge capacity of the battery despite repeated charge/discharge cycles of the battery.

Abstract: A method for manufacturing a hydrogen absorbing alloy including, comprising the steps of (a) causing a punched metal sheet to run in a slurry of hydrogen absorbing alloy powder, to thereby cause the slurry to be adhered onto the punched metal sheet, the punched metal sheet having a plurality of apertures arranged in a staggered fashion; (b) drying the punched metal sheet on which the slurry has been adhered, to thereby obtain an electrode sheet; (c) cutting the electrode sheet into electrode sheet fragments, each electrode sheet fragment having a first axis and a second axis perpendicular to the first axis, and each electrode sheet fragment having aperture-formed portions and aperture-non-formed portions therein; (d) rolling an electrode sheet fragment in a rolling direction parallel to the first axis of the electrode sheet fragment, the electrode sheet fragment having an aperture array arrangement such that any given line running along the electrode sheet fragment parallel to the second axis of the electrode

Abstract: A paste nickel electrode plate comprising a porous metal substrate filled with a mixture of a nickel hydroxide powder used as an active material and a CoO powder used as an electroconductive material wherein the CoO powder has a covering layer containing hydroxyl groups on the surfaces of the powder particles to prevent the formation of Co.sub.3 O.sub.4 on the surfaces of the CoO powder particles. A storage battery is provided using the above-described paste nickel electrode plate as a positive electrode.

Abstract: A nickel hydroxide electrode useful in an alkaline secondary battery containing at least one of a copper-based additive or a manganese-based additive in either a nickel hydrogen active material as applied to a porous metal substrate, in a porous metal substrate itself, or both. The copper-based additive is at least member of the group consisting of copper, cuprous oxide and cupric oxide. The manganese-based additive is at least member of the group consisting of metal manganese, MnO, Mn.sub.2 O.sub.3, Mn.sub.3 O.sub.4, MnO.sub.2, MnO.sub.3, Mn.sub.2 O.sub.7, Mn(OH).sub.2, MnCO.sub.3, K.sub.2 MnO.sub.2, and KMnO.sub.4. When the additive is used in a positive electrode for an alkaline secondary battery, the rate of absorption of hydrogen gas generated in the battery is accelerated resulting in a reduction of the internal pressure of the battery.

Abstract: A hydrogen-occlusion-alloy electrode comprises a current collector on which an active material mixture is supported, wherein the active material mixture contains hydrogen-occlusion-alloy powder, a binding agent and an electrically conductive material as essential components, and the electrically conductive material consists of powder containing carbon and nickel as essential components and has a carbon content of 0.2 to 3% by weight. The hydrogen-occlusion-alloy electrode is incorporated in a battery and restrains the internal pressure of the battery from rising when the battery is overcharged.