Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Mitsubishi Chemical Corporation

Akihiro Maeda

Yoshio Moriwaki

Isao Matsumoto

Hirokazu Kimiya

Hidekazu Hiratsuka

Sou Kuranaka

Yasushi Nakamura

Tsuneo Takano

Kohji Yuasa

Yoichi Izumi

Hiroyuki Sakamoto

Yoshitaka Dansui

Junji Nakajima

Futoshi Tanigawa

Hidekatsu Izumi

Toru Inagaki

Yoshio Goda

Mitsushi Nishimura

Yuuji Kazehaya

Naoto Hoshihara

Mizuo Iwasaki

Yasuhiko Yamasaki

Youichi Izumi

A fiber reinforced composite material structure comprises a thin sheet that includes a first surface and a plurality of convex portions which protrude and are regularly arranged on the first surface and each of which includes a top face; and a surface material that includes a second surface and is bonded to the top faces on the second surface.

Fiber reinforced composite material structure, composite material molded body using the same, and manufacturing method therefor

A positive electrode active material for a nonaqueous electrolyte secondary battery contains, as a main component, a lithium composite oxide in which a ratio of Ni relative to a total number of moles of metal elements other than Li is greater than 30 mol %. The lithium composite oxide is a secondary particle being aggregation of primary particles having an average particle diameter of 3 &#x3bc;m or more and 20 &#x3bc;m or less, and having a compression rupture strength of 100 MPa or more and less than 200 MPa. The lithium composite oxide contains at least one element selected from Ba, Ca, and Sr.

Positive electrode active material for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery

A positive electrode active material for a non-aqueous electrolyte secondary battery according to an example of an embodiment of the present disclosure includes a lithium composite oxide as a main component. The ratio of a number of moles of Ni in the lithium composite oxide to a total number of moles of metal elements in the lithium composite oxide other than Li is larger than 30 mol %. The lithium composite oxide includes particles each including aggregated primary particles having a volumetric average particle size of 0.5 &#x3bc;m or more and at least one element selected from W, Mo, Nb, and Ta is dissolved in the lithium composite oxide.

Positive electrode active material for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

The present invention relates to a lead-acid battery Comprising a positive and a negative electrode, each having a current collector comprising an expanded grid, characterized in that at least one of the positive electrode and the negative electrode contains an organic binder in an active material layer at an edge portion thereof. This makes it possible to suppress an internal short circuit resulting from the separation or abnormal growth of an active material due to repeated charge/discharge, thereby remarkably prolonging the cycle life of a lead-acid battery.

Electrode for lead-acid battery

The battery electrode plate includes a core member () which is densely coated with a mixture paste chiefly including an active material (). The core member () is made of a metal sheet (), which is formed with rows () of first and second bowed portions () arranged along one direction (X) of the metal sheet so as to protrude alternately on the front and back sides of the metal sheet, the rows () of bowed portions arranged along the direction (Y) orthogonal to the direction (X) with flat parts () of a predetermined width interposed between each two rows. The battery electrode plate is produced by any of a reciprocating type continuous press method, a rotary type molding method, and an electrolytic deposition method.

Electrode plate for cell and method for manufacturing the same

The paste type positive electrode of the present invention contains a first active material and a second active material. The first active material comprises X parts by weight of particulate nickel hydroxide with aX/100 parts by weight of cobalt oxyhydroxide carried thereon. The second active material comprises Y parts by weight of particulate nickel oxyhydroxide, of which an oxidation number of nickel is &#x3b1;, with bY/100 parts by weight of cobalt oxyhydroxide carried thereon. Here, all the following relations are satisfied: (1) 2.5&#x2266;&#x3b1;&#x3c;3.0, (2) 0.01&#x2266;(aX/100+bY/100)/(X+Y)&#x2266;0.20, (3) 0&#x3c;b&#x2266;a&#x2266;10 or 0=b&#x3c;a&#x2266;10, and (4) 2.1&#x2266;(2X+&#x3b1;Y)/(X+Y)&#x3c;2.2.

Paste type positive electrode for alkaline storage battery, and nickel-metal hydride storage battery

The present invention relates to a hydrogen storage alloy electrode composed of a hydrogen storage alloy having a CaCu region and a Ce Ni region in the crystal structure and satisfies the relational formula: p:q&equals;1:(4&plus;a), where p is the sum of the mole fraction of an element occupying the Ca site of the CaCu region and the mole fraction of an element occupying the Ce site of the Ce Ni region, q is the sum of the mole fraction of an element occupying the Cu site of the CaCu region and the mole fraction of an element occupying the Ni site of the Ce Ni region, and &minus;0.2&lE;a&lE;0.4. Accordingly, although the hydrogen storage alloy electrode contains a little or no Co, it is possible to obtain an electrode having little deterioration due to pulverization of the alloy and a high capacity.

Hydrogen absorbing alloy electrode, electrode producing method and alkali storage battery

In the description, a hydrogen storage alloy electrode comprising a hydrogen storage alloy and a conductive metal and completely free of organic binder is disclosed, wherein at least two layers of an active material holding layer and a conductive metal layer essentially are integrated into an electrode sheet having a conductive network communicating throughout the electrode. The electrode can be used in a nickel-metal hydride storage battery, for example, particularly exhibits high efficiency charge/discharge characteristics while satisfying general characteristics as a battery, and has a relatively low cost and facilitates recycling.

Hydrogen storage alloy electrode, battery including the same and method for producing the both

A nickel positive electrode including an active material mixture mainly composed of a nickel oxide and an electrically conductive support, a metal and/or an oxide thereof including elements effective for increasing oxygen overvoltage, preferably at least one element selected from Ca, Ti, Nb, Cr, Y and Yb is contained in a conducting agent such as metallic Co and/or Co oxide added to supplement the electrical conductivity of the active material. By virtue of this construction, the decrease of charging efficiency caused by increase of battery temperature and decrease of the oxygen overvoltage with charging of the battery can be inhibited and the charging efficiency can be improved in a wide temperature atmosphere. Thus, a nickel-metal hydride storage battery of high capacity can be provided.

Alkaline storage battery

A high energy density alkaline storage battery which uses a positive electrode including mainly nickel oxide is provided by increasing the capacities of the positive electrode and negative electrode. For increasing the capacity density of the positive electrode, the active material is incorporated as a solid solution with at least one element selected from manganese, chromium, aluminum and calcium in the range of from not less than 3 mol % to not more than 15 mol % relative to the active material, and the surface and/or the neighborhood of the surface of the active material are coated with a cobalt oxyhydroxide having a high electric conductivity of a specific resistance of 15 &OHgr;&middot;cm or less and a low crystallinity.

The present invention provides alkaline storage batteries of which high-rate discharge characteristic at low-temperature, cycle life, and storage performance at high-temperature are improved in good balance and the cost performance is superior even when the content of cobalt is made extremely low by using in the negative electrode consisting of hydrogen absorbing alloy powders based on MmNi system alloys comprising MmNi.sub.5 system alloy which remains mostly crystalline in phase when absorbing hydrogen and Mm.sub.2 Ni.sub.7 system alloy which turns mostly amorphous in phase upon absorbing hydrogen.

Negative electrode for alkaline storage batteries

Disclosed is a sealed alkaline storage battery with an increased utilization of a positive electrode active material comprising a nickel oxide and with drastically enhanced capacity density. The positive electrode active material is a nickel based multi-metals oxide containing at least one element such as Mn which promotes the formation of .gamma. phase during charging. The ratio A.sub..gamma. /A.sub..beta. of the integrated intensity A.sub..gamma. of the diffraction peak at d=about 7 angstroms attributed to the .gamma. phase to the integrated intensity A.sub..gamma. of the diffraction peak at d=about 4.5 to 5.0 angstroms attributed to the .beta. phase of the oxide in the completely charged state is not smaller than 0.4. The electrolyte comprises an aqueous solution containing at least one of K.sup.+ and Na.sup.+ as a cationic component and the total concentration of the above-mentioned cationic component in the completely charged state is within a range between 4 and 12 mol/l.

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Toyohashi, Japan

Akihiro Maeda