Sanyo Electric Co., Ltd.

Kyocera Corporation

International Superconductivity Technology Center

Tokyo Gas Company Limited

Takaaki Ikemachi

Shinichi Koriyama

Hisao Yamauchi

Shigeto Tamezane

Takashi Yamaguchi

Atsumu Imasato

Takamichi Hirosawa

Toshiyuki Nohma

Katsunori Yanagida

Takashi Kawano

Naoya Nakanishi

Yoshinori Kida

Toyoki Fujihara

Satoshi Narukawa

Yoshinori Yokoyama

Kazuhiro Kitaoka

Shigekazu Yasuoka

Hideki Kitao

Atsushi Yanai

Hideki Okajima

Shin-ichi Koriyama

Kazuhisa Takeda

Toshiyuki Nouma

A lithium secondary battery including a positive electrode, a negative electrode including a carbon material as an active material, and a nonaqueous electrolyte comprising a solute dissolved in a nonaqueous solvent in which &#x3b3;-butyrolactone is the main solvent, wherein the carbon material has a ratio (I/I) of a Raman spectrum intensity (a peak intensity ratio) (R) obtained by Raman spectroscopy of 0.2 or greater, and the nonaqueous electrolyte includes at least 0.1 part by weight of vinylene carbonate and at least 0.1 part by weight of vinyl ethylene carbonate in 100 parts by weight of the nonaqueous electrolyte.

Lithium secondary battery

A lithium secondary battery is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte prepared by dissolving a solute in a non-aqueous solvent wherein a positive electrode active material of said positive electrode is composed of lithium-manganese composite oxide having a spinel structure and lithium-transition metal composite oxide having a layer structure containing at least nickel and lithium salt having oxalato complex as anion is admixed to said non-aqueous electrolyte.

The separator for use in the alkaline storage battery of the invention comprises densely and uniformly formed over the entire separator and entrained from the surface to the back plane of the separator, first fine paths (pores) rendered hydrophilic and second fine paths (pores) rendered non-hydrophilic. In this manner, the gas generated in the vicinity of the first fine paths (pores) can immediately reach the second fine paths (pores) formed in the vicinity of the first fine paths (pores) and transferred. On the other hand, the ions that attempt passing through the second fine paths (pores) can readily reach the first fine paths (pores) formed in the vicinity of the second fine paths (pores) , and hence, the ions can be transferred through the first fine paths (pores)

Alkaline storage battery

The present invention provides an alkaline storage battery excellent in both charge properties and discharge properties. A novel alkaline storage battery is provided comprising an active positive electrode material containing nickel hydroxide as a main component and an alkaline electrolyte containing at least Li and Na , characterized in that the positive electrode contains Y and/or Y compound and the alkaline electrolyte has an Li content of from not lower than 0.1 to less than 1.0 N and an Na content of from 0.3 to 1.5 N.

Alkaline storage battery and method for manufacturing the same

An electrode body in which current collecting bodies are welded to upper and lower end surfaces of a spiral electrode group formed by interposing a separator between a positive electrode plate and a negative electrode plate is installed into a battery case. After the current collecting body is welded to the battery case, the cylindrical body is loaded on the diameter of the current collecting body, then the blade portions are welded, then the electrolytic solution is injected, and then a pair of electrodes are arranged on the port-sealing body and the battery case while bringing the bottom surface of the port-sealing body into contact with the peripheral side surface of the cylindrical body. After the contact portion between the port-sealing body and the peripheral side surface of the cylindrical body is welded by supplying the current in the discharge direction while applying pressure between the electrodes, the opening of the battery is sealed by caulking the opening edge of the battery case, and then the port-sealing body is pushed into the battery case by applying the force to the port-sealing body, whereby the storage battery is fabricated.

Storage battery and method of fabricating the same

A cylindrical alkaline storage battery including a spiraled electrode body composed of a pair of opposed electrodes spirally rolled up through a separator and coupled within a cylindrical casing, at least one of the electrodes being in the form of a non-sintered type electrode composed of an active material retention substrate of three dimensionally meshed structure impregnated with paste of an active material, and a current collector formed with a disc portion for connection to one end portion of the non-sintered type electrode and a lead portion for connection to a terminal, wherein the one end portion of the non-sintered type electrode is formed without impregnation of the paste of the active material, and wherein a perforated sheet metal welded to the one end portion of the non-sintered type electrode is welded at its side edge to the disc portion of the current collector.

Cylindrical alkaline storage battery and manufacturing method of the same

The present invention aims to provide a method of producing a hydrogen absorbing alloy electrode which is solid and enables a metal hydride storage cell, using the hydrogen absorbing alloy electrode, with high discharge characteristics in high-rate discharge and in low temperature and a long cycle life. To achieve this, the hydrogen absorbing alloy electrode is produced by firstly generating a first powder by giving a surface treatment to a hydrogen absorbing alloy powder in an acid solution, secondly generating a mixed material by mixing the first powder with a second powder which is composed of a metal which does not absorb hydrogen and/or an alloy which does not absorb hydrogen, thirdly attaching the mixed material to a base plate, and fourthly baking the base plate for sintering the mixed material attached to the base plate. The hydrogen absorbing alloy electrode may also be produced by firstly generating a first powder by attaching a nickel-rich metal to the surface of a hydrogen absorbing alloy powder, secondly generating a mixed material by mixing the first powder with a second powder which is composed of a metal which does not absorb hydrogen and/or an alloy which does not absorb hydrogen, thirdly attaching the mixed material to a base plate, and fourthly baking the base plate for sintering the mixed material attached to the base plate.

Metal hydride storage cell and method of producing hydrogen absorbing

A hydrogen storage alloy electrode for use in electrochemical hydrogen storage cells, the electrode being in the form of a negative electrode fabricated by sintering a mixture of a hydrogen storage alloy containing manganese and an alloy containing a measured amount of manganese.

Hydrogen storage alloy electrode and manufacturing method of the same

A hydrogen storage alloy electrode for use in electro-chemical hydrogen storage cells, the electrode being in the form of a negative electrode fabricated by sintering a mixture of a hydrogen storage alloy containing manganese and an alloy containing a measured amount of manganese.

In the production of a 124-type or 123-type superconductor by a sol-gel method using alkoxides of respective metals, the use of a compound wherein a sec-butoxy group and a hydroxy group are coordinated with a copper atom gives a superconductor composed of flat particles having a broad C plane. The dimensional ratio defined by l/d is at least 6.7 in the case of the 124-type or is at least 8.4 in the case of the 123-type. It shows a superconducting property at a liquid nitrogen temperature. This superconductor shows a higher critical current density than one obtained by a sintering method.

1-2-4 copper oxide superconductor, a process for its production, and a

In the production of a 124-type or 123-type superconductor by a sol-gel method using alkoxides of respective metals, the use of a compound wherein a secbutoxy group and a hydroxy group are coordinated with a copper atom gives a superconductor composed of flat particles having a broad C plane. The dimensional ratio defined by l/d is at least 6.7 in the case of the 124-type or is at least 8.4 in the case of the 123-type. It shows a superconducting property at a liquid nitrogen temperature. This superconductor shows a higher critical current density than one obtained by a sintering method.

Copper oxide superconductor, a process for its production, and a copper

An oxide superconductor having the following formula:

Growing community of inventors

Kobe, Japan

Takaaki Ikemachi