Sanyo Electric Co., Ltd.

Fdk Corporation

Fujitsu Corporation

Basf Corporation

Japan Metals & Chemicals Co., Ltd.

Shigekazu Yasuoka

Jun Ishida

Yoshifumi Magari

Tetsuyuki Murata

Takahiro Endo

Shohei Unoki

Takeshi Kajiwara

Yoshikatsu Watanabe

Takashi Yamazaki

Kwo Young

Takeshi Ito

Masaru Kihara

Diana F Wong

Tadayoshi Tanaka

Jean Nei

Taihei Ouchi

Yuzo Imoto

Yuji Kataoka

Shuuichi Doi

Koji Nishio

Mutsumi Yano

Mamoru Kimoto

Hiroshi Nakamura

Toshiki Sato

Yoshinori Yokoyama

Toshihiko Saito

Mitsuzo Nogami

Katsuhiko Shinyama

Reizo Maeda

Akira Saguchi

Takaaki Ikemachi

Takayuki Yano

Atsumu Imasato

Minori Inoue

Syouhei Unoki

A batteryincludes: a container; and an electrode grouphoused in the containertogether with an alkaline electrolyte liquid. The electrode groupincludes a nickel electrodeas a positive electrode and a negative electrodethat are combined with a separatorinterposed therebetween. The nickel electrodeincludes a positive electrode core and a positive electrode mixture permeated in the positive electrode core. The positive electrode mixture contains nickel hydroxide that is a positive electrode active material. The nickel hydroxide contains a sulfate salt, and a weight rate of a S component contained in the sulfate salt to a Ni component in the nickel hydroxide is 0.28% or more and 1.50% or less.

Nickel electrode for alkaline secondary battery and alkaline secondary battery including nickel electrode

A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.

Catalyst for air electrode, air electrode including catalyst for air electrode, and air secondary battery including air electrode

An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by BiRuOand a crystal structure represented by BiRuO.

Air electrode catalyst for air secondary battery and air secondary battery

A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.

Method for producing catalyst for air secondary battery, method for producing air secondary battery, catalyst for air secondary battery, and air secondary battery

A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.

Positive electrode active material for alkaline secondary battery and alkaline secondary battery including the positive electrode active material

A multi-phase hydrogen storage alloy comprising a hexagonal CeNiphase and a hexagonal PrCophase, where the CeNiphase abundance is &#x2265;30 wt % and the PrCophase abundance is &#x2265;8 wt % and where the alloy comprises a mischmetal where Nd in the mischmetal is &#x3c;50 at % or a multi-phase hydrogen storage alloy comprising one or more rare earth elements, a hexagonal CeNiphase and a hexagonal PrCophase, where the CeNiphase abundance is from about 30 to about 72 wt % and the PrCophase abundance is &#x2265;8 wt % have improved electrochemical performance. The alloys are useful in an electrode in a metal hydride battery, a fuel cell or a metal hydride air battery.

Hydrogen storage multi-phase alloys

A nickel-hydrogen secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode, the positive electrode includes a positive electrode active material, the positive electrode active material includes a composite particle including a compound of Co and a compound of Ni, and the ratio R represented by A/B satisfies a relationship of R&#x2265;0.3, when the amount of jumping in the X-ray absorption fine structure spectrum of the Co in 7600 to 7800 eV and the amount of jumping in the X-ray absorption fine structure spectrum of the Ni in 8300 to 8500 eV obtained by measurement according to a conversion electron yield method are defined as A and B, respectively.

Positive electrode active material for nickel-hydrogen secondary battery, nickel-hydrogen secondary battery including the positive electrode active material, and method of evaluating positive electrode active material

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

An alkaline storage battery has a negative electrode using a hydrogen-absorbing alloy represented by a general formula LnMgNiAwherein Ln is at least one element selected from rare-earth elements including Y, Ca, Zr, and Ti, A is at least one element selected from Co, Fe, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B, and 0.15&#x2266;x&#x2266;0.30, 0&#x3c;z&#x2266;1.5, and 2.8&#x2266;y+z&#x2266;4.0 are satisfied. The hydrogen-absorbing alloy has a hexagonal system crystal structure or a rhombohedral system crystal structure as its main phase and has a subphase of line which average number of not less than 50 nm in thickness existing in the range of 10 &#x3bc;m&#xd7;10 &#x3bc;m in the cross section of the main phase is 3 or less.

Hydrogen-absorbing alloy, fabrication method thereof and alkaline storage battery

A hydrogen-absorbing alloy for alkaline storage battery which is produced by a rapid cool using a rapid quenching method and whose component is represented by a general formula LnMgNiAlZis used for a negative electrode of an alkaline storage battery.

Method of making hydrogen-absorbing alloy for alkaline storage battery, and alkaline storage battery

A hydrogen absorbing alloy is provided that is represented by the general formula LnMgNiA, where: Ln is at least one element selected from the group consisting of Ca, Zr, Ti, and rare-earth elements including Y; A is at least one element selected from the group consisting of Co, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P, and B; and x, y, and z satisfy the following conditions 0.05&#x2266;x&#x2266;0.25, 0&#x3c;z&#x2266;1.5, and 2.8&#x2266;y+z&#x2266;4.0, wherein Ln contains 20 mole % or more of Sm.

Hydrogen-absorbing alloy and nickel-metal hydride storage battery

A hydrogen absorbing alloy represented by the formula LnMgNiAl(where Ln is at least one element selected from rare earth elements, 0.05&#x2266;x&#x3c;0.20, 2.8&#x2266;y&#x2266;3.9 and 0.10&#x2266;a&#x2266;0.25) which is used for an alkaline storage battery.

Hydrogen absorbing alloy for alkaline storage battery

Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.

Hydrogen-absorbing alloy electrode, alkaline storage battery, and method of manufacturing the 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.

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Kobe, Japan

Shigekazu Yasuoka