Sanyo Electric Co., Ltd.

Tadayoshi Tanaka

Toshiyuki Nohma

Katsuhiko Shinyama

Ikuo Yonezu

Yoshifumi Magari

Yoshinori Matsuura

Reizo Maeda

Yasuyuki Harada

Hiroshi Minami

Naoki Imachi

Shigekazu Yasuoka

Atsuhiro Funahashi

Hiroyuki Akita

Yoshinori Kida

Masaru Kihara

Toshiki Sato

Jun Ishida

Hiroyuki Fujimoto

Akira Saguchi

Tetsuyuki Murata

Kazunari Yasumura

Mai Yokoi

Takatoshi Higuchi

Daisuke Imai

Kunihiro Iwai

Kazunari Okita

A positive electrode including a positive electrode mixture layer containing a positive electrode active material represented by LiNiCoMnOhaving a layered structure, a negative electrode containing a negative electrode active material, a separator provided between the positive electrode and the negative electrode, and a nonaqueous electrolyte are included, in which a film composed of carbon black permeable to lithium ions is formed on a surface of the positive electrode active material, and the film contains lithium fluoride particles serving as metal halide particles.

Nonaqueous electrolyte secondary battery

Provided is a nonaqueous electrolyte secondary battery in which a negative-electrode active material containing a graphite material and silicon or a silicon compound is used and which has an excellent charge-discharge cycle characteristic. In the nonaqueous electrolyte secondary battery, the negative-electrode active material used is an active material containing a graphite material and silicon or a silicon compound, and the negative electrode binder used comprises a polyimide and polyvinylpyrrolidone.

A composition for an electrode of a nonaqueous electrolyte secondary battery contains an active material and a binder resin. The composition contains a vinylpyrrolidone-based polymer as the binder resin. The hydroxyl group equivalent of the vinylpyrrolidone-based polymer is within the range of 250 to 2500.

Composition for electrode of nonaqueous electrolyte secondary battery, electrode for nonaqueous electrolyte secondary battery using the same and nonaqueous electrolyte secondary battery

A negative electrode for alkaline storage battery using a hydrogen-absorbing alloy includes fluorinated oil and a surface active agent.

Negative electrode for alkaline storage battery, fabrication method thereof, and alkaline storage battery

A hydrogen-absorbing alloy for a negative electrode in an alkaline storage battery includes a first hydrogen-absorbing alloy and a second first hydrogen-absorbing alloy. The first hydrogen-absorbing alloy contains at least a rare-earth element, Mg, Ni, and Al, and has an intensity ratio I/Iof 0.1 or greater in X-ray diffraction analysis using Cu&#x2014;K&#x3b1; radiation as an X-ray source, where Iis the strongest peak intensity that appears in the range of 2&#x3b8;=31&#xb0; to 33&#xb0;, and Iis the strongest peak intensity that appears in the range of 2&#x3b8;=40&#xb0; to 44&#xb0;. The second hydrogen-absorbing alloy has a Co content greater than that of the first hydrogen-absorbing alloy.

Hydrogen-absorbing alloy electrode and alkaline storage battery

A separator for a nickel-metal hydride storage battery having a hydrogen-absorbing alloy as a negative electrode. The separator is a laminate of a substrate and a porous hydrophilic film.

Separator for nickel-metal hydride storage battery and nickel-metal hydride storage battery

A nickel-metal hydride storage battery comprising a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy and an alkaline electrolyte, wherein the positive electrode contains a hydroxide and/or an oxide of an element selected from the group consisting of calcium, strontium, scandium, yttrium, lanthanoid and bismuth, and the negative electrode contains germanium.

Nickel-metal hydride storage battery

A nickel-metal hydride storage battery which includes a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy and an alkaline electrolyte, wherein the positive electrode contains a hydroxide and/or an oxide of an element selected from the group consisting of calcium, strontium, scandium, yttrium, lanthanoid and bismuth, and the negative electrode contains a hydroxide and/or an oxide of at least one element selected from the group consisting of scandium, yttrium and lanthanoid.

In an alkaline secondary battery provided with a positive electrode, a negative electrode, a separator to be interposed between the positive electrode and the negative electrode, and an alkaline electrolyte solution, the above-mentioned separator has carbon-carbon double bonds. Further, an average amount of carbon-carbon double bonds in the separator is in the range of 10 &mgr;mol/g to 200 &mgr;mol/g, and an average amount of increased nitrogen in the separator after the separator is immersed in an alkaline aqueous solution having ammonium salt dissolved therein is not less than 140 &mgr;g/g.

Separator for alkaline secondary battery, method for preparing the same alkaline secondary battery

In a hydrogen absorbing alloy electrode employed as a negative electrode of an alkaline storage battery, a covering layer containing at least one of metal elected from nickel and cobalt, and carbon particles is formed on a surface of the hydrogen absorbing alloy electrode or hydrogen absorbing alloy particles used in the hydrogen absorbing alloy electrode.

Hydrogen absorbing alloy for electrode, hydrogen absorbing alloy electrode and alkaline storage battery

A nickel electrode for alkaline secondary battery including a porous sintered nickel substrate loaded with a nickel hydroxide-based active material, the nickel electrode has a configuration wherein a surface portion of the active material loaded into the sintered nickel substrate is provided with a combination of a first coating layer of a suitable compound and a second coating layer of a suitable compound, or a coating layer of a compound of two or more suitable elements, or wherein the coating layer of two or more suitable elements is formed between the sintered nickel substrate and the active material.

Nickel electrodes for alkaline secondary battery and alkaline secondary batteries

In a hydrogen absorbing alloy electrode containing hydrogen absorbing alloy powder and a binding agent, employed as the binding agent is a copolymer of aromatic vinyl and at least one of acrylic ester and methacrylic acid ester, in which the total content of acrylic ester units and methacrylic acid ester units is in the range of 43 to 90% by weight of the whole copolymer, and the hydrogen absorbing alloy electrode is used as a negative electrode of a nickel-metal hydride battery.

Hydrogen absorbing alloy electrode and nickel-metal hydride battery

A hydrogen absorbing alloy electrode is prepared by adding a binder to a hydrogen absorbing alloy powder and forming the mixture to a shape of an electrode, and the binder is partly or entirely made of poly N-vinyl acetamide, whereby higher high-rate discharge characteristics are obtained than conventionally.

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Takatsuki, Japan

Tadayoshi Tanaka