Nissan Motor Company Limited

Other

Seimi Chemical Co., Ltd.

Fumio Munakata

Manabu Suhara

Takashi Kimura

Yasuhiko Ohsawa

Kazuo Sunahara

Tatsuhiro Fukuzawa

Takuya Mihara

Yuuji Tanjo

Yoshio Akimune

Susumu Hiyama

Mitsugu Yamanaka

Takeshi Miyamoto

Hiroaki Kaneko

Mikiya Shinohara

Masayuki Touda

Fumio Yukawa

Hideaki Horie

Masakazu Kobayashi

Masaaki Uchida

Osamu Shimamura

Shinji Kimura

Takaaki Abe

Yasukazu Iwasaki

Masaharu Hatano

Satoru Ichikawa

Naoki Hara

Kenji Furuya

Kazuhiko Shinohara

Tatsuo Sugiyama

Yoshinori Fujie

Keiko Ikoma

Kazuo Matsuo

Kohji Masuda

A layered composite oxide is provided which is excellent in oxygen ion conductivity and, is capable of effectively decreasing a PM oxidation temperature without using a noble metal such as platinum or the like. The layered composite oxide is used in an oxidation catalyst, DPF, a ternary catalyst, and a NOx purification catalyst. The layered composite oxide has a composition represented by the following formula (1), LaSrMnBO. . . (1) (wherein B represents Cu and/or Fe, and y satisfies 0&#x3c;y&#x2266;0.2).

Layered composite oxide, oxidation catalyst, and diesel particulate filter

The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470&#xb0; C., is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.

Composite oxide for solid oxide fuel cell and method for preparation thereof

A piezoelectric material includes a polycrystalline piezoelectric compound having a component composition defined as SrCaNaNbO, where x=0.05 to 0.35, and at least one rare earth oxide compound selected from the group consisting of YO, LaO, DyO, NdO, YbO, SmO, ErO, GdOand PrOto be added to the piezoelectric compound by 0.5 to 3.0 wt %. Moreover, a method of manufacturing the piezoelectric material includes blending ceramic materials, synthesizing, milling, pressing and sintering processes. In the synthesizing process, calcining is conducted at a temperature in a range from 1,050&#xb0; C. to 1,150&#xb0; C. for 2 to 12 hours in the atmosphere. And the sintering process includes first firing at temperature in a range from 1,180&#xb0; C. to 1,270&#xb0; C. for 4 to 8 hours in the atmosphere, and second firing at a temperature in a range from 1,370&#xb0; C. to 1,400&#xb0; C. for 10 to 75 hours in the atmosphere.

Piezoelectric material and method for manufacture thereof

A solid oxide fuel cell (SOFC) contains a first solid electrolyte layer of LaGa-based perovskite, an air electrode, a fuel electrode and a second solid electrolyte layer (having a hole transport number smaller than that of the first solid electrolyte layer), which is provided between the first solid electrolyte layer and an air electrode. Also, another SOFC contains a first solid electrolyte layer of LaGa-based perovskite, an air electrode, a fuel electrode and a third solid electrolyte layer (having electron and proton conductivity lower than that of the first solid electrolyte layer), which is provided between the first solid electrolyte layer and the fuel electrode. Still another SOFC contains the second solid electrolyte layer provided between a first solid electrolyte layer and an air electrode and the third solid electrolyte layer provided between the first solid electrolyte layer and a fuel electrode.

Solid oxide fuel cell having perovskite solid electrolytes

A solid electrolyte material contains an A site-deficient complex oxide represented by a chemical formula A BO , in which a B site contains at least Ga. This solid electrolyte material has stability, high oxide-ion conductivity at low temperature and high toughness. A method of manufacturing the solid electrolyte material, comprises: mixing oxide materials of respective constituent elements; baking temporarily the mixed materials at 1100 to 1200&deg; C. for 2 to 10 hours; grinding the temporarily baked materials to powder; molding the powder; and sintering the molded powder. A solid oxide fuel cell, has: the solid electrolyte material; a cathode electrode formed on one surface of the solid electrolyte material; and an anode electrode formed on the other surface of the solid electrolyte material. The solid oxide fuel cell has a stable and long operation at low temperature.

Gallate based complex oxide electrolyte material

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the formula Li A MnO , or the formula Li A Mn M O . The lithium-containing manganese composite oxide includes a lithium substitute metal A, such as Na, K, Ag, substituting for part of Li. The lithium substitution quantity x may be in the range of 0.03<x&lE;0.2.

Positive electrode material and battery for nonaquous electrolyte secondary battery

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li Mn M O . The lithium-containing manganese composite oxide is deficient in lithium with respect to the stoichiometric composition of a layered crystal structure represented by the general formula LiMeO . Part of Mn is replaced by a substitute metal such as Co, Ni, Fe, Al, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr.

Positive electrode material and battery for nonaqueous electrolyte secondary battery

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMO2-y-&dgr;Fy. The second metallic element or constituent M may be Mn or a combination of Mn and substitute metal such as Co, Ni, Cr, Fe, Al, Ga or In. A lithium deficiency quantity x is in the range of 0<x<1. An oxygen defect quantity &dgr; may be equal to or smaller than 0.2. A quantity y of fluorine substituting for part of oxygen is greater than zero.

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1-xMnO2-&dgr;. A lithium deficiency quantity x is in the range of 0.03<x&lE;0.5. An oxygen nonstoichiometry quantity &dgr; is equal to or smaller than 0.2.

Positive electrode material and cell for nonaqueous electrolyte secondary battery

Solid electrolyte, method of producing same and fuel cell using same

A voltage-responsive optical sensing device such as a semiconductor device of a light emitting device and/or liquid crystal device of a sensing apparatus for sensing an excessive charge and/or excessive discharge state of a battery, such as a lithium ion secondary battery is incorporated into an inside of a cell of a cell group to form the battery. For example, with electrodes of the liquid crystal device connected in parallel to the cell and a light beam of an external light source introduced into the liquid crystal device, a photo sensor senses a change in a light-transmissive characteristic of the liquid crystal device so that the state of the cell constituting the battery can be sensed.

Battery state sensing apparatus

An electrode material is disclosed which includes: a composite oxide of an A-site defect perovskite structure represented by the following general formula

Composite oxides of A-site defect type perovskite structure

A novel composite oxide has an A-site defect type perovskite structure represented by a general formula:

Composite oxides of A-site defect type perovskite structure as catalysts

An n-type thermoelectric material composed mainly of an iron-silicite compound represented by a chemical formula of FeSi.sub.2+z in which -0.1&lt;z&lt;0.1. The thermoelectric material further comprising Co as an n-type dopant and Ge as an additive. The iron-silicon compound is composed substantially of a low temperature phase (.beta.-phase).

n-Type thermoelectric materials

A method of producing a compound oxide of elements including at least one of thallium, bismuth, lead, antimony, yttrium, each of rare earth elements, each of transition metal elements, each of alkali metal elements and each of alkaline earth metal elements. The method is comprised of the steps of (i) reacting at least one of carbonate, basic carbonate, hydroxide and co-precipitates of each of the above-mentioned elements with an amount of citric acid that is less than the weight equivalent of citric acid needed to form a completely citrated compound, and (ii) calcining the partly citrated compound. The co-precipitate can be one of a carbonate, a basic carbonate and a hydroxide of each of the above-mentioned elements.

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Yokohama, Japan

Fumio Munakata