Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Toyoda Gosei Co., Ltd.

Takahiko Asaoka

Shingo Ohta

Kazutaka Hiroshima

Hisao Kato

Toshiyasu Ito

Mitsuru Asai

Yutaka Ohya

Hiroshi Aoki

Masanobu Senda

Seiji Mizuno

Tetsuo Nagami

Mamoru Kato

Tatsuya Kawahara

Takaaki Mori

Yu Morimoto

Tetsuro Kobayashi

Kazuo Kawahara

Katsuhito Yamada

Satoru Yamamoto

Katsushi Abe

Yoshiyuki Sakamoto

Katsuaki Okabayashi

Tomohisa Wakasugi

Hitoshi Kumagai

Tooru Saeki

Shiaki Hyodo

Tatsuo Noritake

Takashi Simazu

Yuki Goto

Shogo Komagata

Satoru Fujita

An all-solid-state lithium secondary battery includes a positive electrode; a negative electrode; and a solid electrolyte arranged between the positive and negative electrodes, to conduct lithium ions. In the all-solid-state lithium secondary battery, a mixed layer is in close contact with a surface of the solid electrolyte adjacent to the positive electrode, the mixed layer containing the positive-electrode active material and (Li, M)(B, A)O(wherein in the formula, M and A each represent at least one or more elements selected from C, Al, Si, Ga, Ge, In, and Sn, &#x3b1; satisfies 0&#x2264;&#x3b1;&#x3c;1, &#x3b2; represents the valence of M, &#x3b3; represents the average valence of (Li, M), y satisfies 0&#x2264;y&#x3c;1, z represents the average valence of (B, A) and x, &#x3b1;, &#x3b2;, &#x3b3;, z, and &#x3b3; satisfy the relational expression (x(1&#x2212;&#x3b1;)+x&#x3b1;/&#x3b2;)&#x3b3;+z=2&#x3b4;) serving as a matrix.

All-solid-state lithium secondary battery and method for producing the same

An all-solid lithium secondary batteryincludes a solid electrolyte layercomposed of a garnet-type oxide, a positive electrodeformed on one surface of the solid electrolyte layerand a negative electrodeformed on the other surface of the solid electrolyte layer. This all-solid lithium secondary batteryincludes an integrally sintered complex of the solid electrolyte layerand the positive electrode active material layer. This complex is obtained by integrally sintering a stacked structure of an active material layer and a solid electrolyte layer. The solid electrolyte layer includes: abase material mainly including a fundamental composition of Li(La,A) (Zr,T)O, wherein A is one or more of Sr and Ca, T is one or more of Nb and Ta, and 0&#x2266;X&#x2266;1.0 and 0&#x2266;Y&#x3c;0.75 are satisfied, as a main component; and an additive component including lithium borate and aluminum oxide.

Garnet-type ion conducting oxide, complex, lithium secondary battery, manufacturing method of garnet-type ion conducting oxide and manufacturing method of complex

There is provided an organic polymer porous body having a first cyclic structure equipped with a 6-membered ring (A) or a 5-membered ring having three bonds; a second cyclic structure equipped with a 6-membered ring (B) having two or three bonds; and a carbon-carbon triple bond that links the first cyclic structure to the second cyclic structure. At least one of the first cyclic structure and the second cyclic structure contains at least one nitrogen atom.

Organic polymer porous body

An all-solid-state lithium ion secondary battery containing a novel garnet-type oxide serving as a solid electrolyte. The garnet-type lithium ion-conducting oxide is one represented by the formula LiLa(Zr, A)O, wherein A is at least one selected from the group consisting of Sc, Ti, V, Y, Nb, Hf, Ta, Al, Si, Ga, Ge, and Sn and X satisfies the inequality 1.4&#x2266;X&#x3c;2, or is one obtained by substituting an element having an ionic radius different from that of Zr for Zr sites in an garnet-type lithium ion-conducting oxide represented by the formula LiLaZrO, wherein the normalized intensity of an X-ray diffraction (XRD) pattern with a diffraction peak, as normalized on the basis of the intensity of a diffraction peak, is 9.2 or more.

Garnet-type lithium ion-conducting oxide and all-solid-state lithium ion secondary battery containing the same

A fuel cell electrode which can improve the catalyst utilization rate by having the catalyst component supported at a high density and high dispersion is provided. An aqueous solution containing chloroplatinic acid and aniline is prepared. For an electrode diffusion layer, a carbon paper is soaked in a Teflon&#xae; dispersion solution and then dried. One side of the electrode diffusion layer is placed in contact with the liquid surface of the solution, and a counter-electrode made of graphite is provided in the solution. A constant electrical current is applied between them, with the electrode diffusion layer side as the positive electrode. As a result, aniline is oxidatively polymerized by electrochemical means, and a uniform layer of platinum-containing polyaniline is formed on the electrode diffusion layer surface. The platinum in the polyaniline is reduced, and this is washed with pure water and dried to make the electrode. Two of these electrodes, with the catalytic layer of the platinum-containing polyaniline on the inside, are placed against both sides of Nafion&#xae; to create a small fuel cell.

Fuel cell electrode, fuel cell, and manufacturing methods thereof

The technique of the present invention attains simple and accurate evaluation of the performance of a fuel cell and enables produce of a high-performance electrode catalyst and a high-performance fuel cell. The procedure makes platinum, a noble metal, and iron, a base metal, carried on carbon having a large specific surface area, and heats up the carbon with platinum and iron to a specific temperature to reduce iron. A resulting platinum-iron alloy electrode catalyst exerts excellent catalytic functions. A fuel cell using this electrode catalyst has a high IR compensation voltage. The quantity of carbon monoxide adsorbed by this novel electrode catalyst is not less than 14 Ncc per one gram of platinum. The atomic number ratio of iron (Fe) to platinum (Pt) in the catalyst is not lower than 0.14 by EDX analysis, and the ratio of the binding number of Pt atom with Fe atom to the total binding number relating to Pt atom is not lower than 0.10 by EXAFS analysis. Each electrode catalyst produced is evaluated by measurement of these data. The fuel cell including the electrode catalyst having the favorable result of evaluation ensures the desired performances.

Noble metal-base metal alloy catalyst, evaluation of such catalyst, and method of producing such catalyst

An electrode catalyst for a fuel cell includes a conductive support, and catalytic particles loaded on the conductive support. The catalytic particles include platinum and a base metal being on the lower end of the electrochemical series with respect to platinum. The number of the atoms of the base metal, forming metallic oxides without alloying with the platinum, is less than 5 atomic % of the number of the atoms of the platinum on a surface of the catalytic particles. The electrode catalyst is produced by loading the platinum and base metal on the conductive support, alloying the platinum and base metal thereon by a heat treatment, thereby making the catalytic particles, and removing metallic oxides from a surface of the catalytic particles. The electrode catalyst is less expensive comparatively, exhibits high catalytic activities, and hardly lowers the battery performance of fuel cells.

Electrode catalyst for fuel cell and process for producing the same

A fuel-cell electrode and a method of manufacturing the fuel-cell electrode achieves a high catalyst utilization ratio and makes it possible to obtain higher output characteristics with a smaller amount of catalyst. The fuel-cell electrode includes a catalytic layer composed of an ion conductive substance, an electron conductive substance and catalytic activation substances. The catalytic activation substances are electrolytically deposited on the electron conductive substance.

Fuel-cell electrode and method of manufacturing the fuel-cell electrode

A humidifier device for use in fuel cells comprising a mist humidifier unit for adding mists to process gas supplied to an electrolyte equipped in a fuel cell and a humidifier unit control device for intermittently operating the mist humidifier unit in accordance with operating condition of the fuel cell.

Humidifer device for fuel cells and operating system thereof

An electrolyte for electrochromic elements which comprises an electrolytic base material to conduct ions and charge-controlling substances contained in the electrolytic base material. The electrolytic base material is composed of a polar organic solvent and a supporting electrolyte and the charge-controlling substance is at least one of oxidizable substances and reducible substances. This electrolyte enables to produce durable electrochromic elements which can balance the charges in both electrodes and avoid a residual color or an uneven color of coloring materials.

Electrolyte for electrochromic elements

An electrochromic element comprising a pair of electrode films, at least one of which is a transparent electrode film, a color forming film laminated between both the electrode films and an electrolyte. The color forming film is formed on the electrode film by depositing thereon a conductive metal oxide such as indium oxide and tungsten oxide. The depositing ratio of tungsten oxide and indium oxide preferably is within the range of 10:1 to 3:1 by weight ratio.

Electrochromic element

Growing community of inventors

Nagoya, Japan

Takahiko Asaoka