Nisshinbo Holdings Inc.

Gunma University

Other

Hokkaido University

Takeaki Kishimoto

Jun-ichi Ozaki

Yoshikazu Kobayashi

Tetsutaro Sato

Yuji Kubota

Siyu Ye

Chihiro Fujii

Dustin William H Banham

Mayumi Mizushiri

Takuya Isaka

Miki Meguro

Kumi Narizuka

Takuya Ishizuka

Yasuo Imashiro

Yuka Koshigoe

Sayaka Kusadokoro

Mikiko Imada

Kazuo Saito

Kyoung J Bai

Rieko Kobayashi

Takuya Maie

Koji Kamata

Ayaka Fujimoto

Seizo Miyata

Hirofumi Iisaka

Masaharu Oshima

Shogo Moriya

Erina Matsuzaka

Naokatsu Kannari

Haruo Kumagai

Akiko Taira

Kyosuke Iida

Yusuke Sudo

Katie Ling Pei

Yasuhiro Oshima

Miki Nakayama

Jun-Ichi Ozaki

Dustin William Banham

A metal-supported catalyst, a battery electrode, and a battery. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles supported on the carbon carrier, wherein a ratio of number-average particle diameter of catalyst metal particles to average pore diameter of metal-supported catalyst is 0.70 or more and 1.30 or less, wherein, at relative pressure of a nitrogen adsorption isotherm of metal-supported catalyst within a range of 0.4 or more and 0.6 or less, maximum value of a ratio of a nitrogen adsorption amount of a desorption-side isotherm to a nitrogen adsorption amount of an adsorption-side isotherm is 1.05 or less, and wherein proportion of number of the catalyst metal particles each supported at a position having a depth of 20 nm or more from an outer surface of the carbon carrier to a total number of the catalyst metal particles supported on the carbon carrier is 11% or more.

Metal-loaded catalyst, battery electrode and battery

A metal-supported catalyst, a battery electrode, and a battery, each having both excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and platinum particles serving as catalyst metal particles supported on the carbon carrier, wherein the platinum particles contain pure platinum particles and platinum alloy particles, wherein a proportion of a weight of the pure platinum particles to a sum of the weight of the pure platinum particles and a weight of the platinum alloy particles is 15% or more and 61% or less, and wherein a ratio of a proportion of a nitrogen atom content to a carbon atom content measured by elemental analysis using a combustion method, to a proportion of a nitrogen atom content to a carbon atom content measured by X-ray photoelectron spectroscopy, is 1.05 or more.

Metal-supported catalyst, battery electrode, and battery

A metal-supported catalyst, a battery electrode, and a battery, each having both excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles each containing a noble metal supported on the carbon carrier, wherein a volume of first pores each having a diameter of 0.5 nm or more and 2.0 nm or less per unit weight of the carbon carrier is 0.20 (cm/g-carrier) or more, wherein a volume of second pores each having a diameter of more than 2.0 nm and 4.0 nm or less per unit weight of the carbon carrier is 0.20 (cm/g-carrier) or more, and wherein a ratio of a content (wt %) of the noble metal measured by X-ray photoelectron spectroscopy, to a content (wt %) of the noble metal measured by inductively coupled plasma mass spectrometry, is 0.35 or more and 0.75 or less.

A metal-supported catalyst, battery electrode, and battery, each having excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles supported thereon, wherein, in a photoelectron spectrum obtained by X-ray photoelectron spectroscopy, the catalyst exhibits, as a peak derived from a is orbital of a nitrogen atom, a peak to be separated into peaks of first to sixth nitrogen atoms having peak tops in the following respective ranges: (1) 398.6±0.2 eV; (2) 399.5±0.3 eV; (3) 400.5±0.2 eV; (4) 401.3±0.3 eV; (5) 403.4±0.4 eV; and (6) 404.5±0.5 eV, wherein a ratio of a peak area of the second nitrogen atoms to a total peak area of the nitrogen atoms of the (1) to (6) is 0.03 or more, and wherein a ratio of a concentration of the second nitrogen atoms to a concentration of carbon atoms measured by the X-ray photoelectron spectroscopy is 0.0005 or more.

Metal supported catalyst, battery electrode, and battery

A carbon catalyst has a carbon structure with a crystallite size Lc falling within 0.90 nm or more and 1.20 nm or less calculated through use of a Bragg angle of a diffraction peak fat a diffraction angle 2θ of 24.0°±4.0° obtained by separating a diffraction peak in the vicinity of a diffraction angle 2θ of 26° in an X-ray diffraction pattern obtained by powder X-ray diffraction using a CuKα ray, and a carbon dioxide desorption amount from 650° C. to 1,200° C. of 97 μmol/g or less, a total of a carbon monoxide desorption amount and a carbon dioxide desorption amount from 650° C. to 1,200° C. of 647 μmol/g or less, or a carbon monoxide desorption amount from 650° C. to 1,200° C. of 549 μmol/g or less in a temperature programmed desorption method including measuring a carbon dioxide desorption amount from 25° C. to 1,200° C.

Carbon catalyst, battery electrode, and battery

A cathode of a battery including an electrolyte membrane, containing a first layer which contains 0.3 mg/cmor more and 9.0 mg/cmor less of a carbon catalyst; and a second layer which is arranged between the electrolyte membrane and the first layer in the battery, and which contains 0.002 mg/cmor more and 0.190 mg/cmor less of platinum. The carbon catalyst has a ratio of a mesopore volume to a total pore volume of 30% or more.

Cathode, membrane electrode assembly, and battery

Provided are a carbon catalyst, an electrode, and a battery that exhibit excellent activity. A carbon catalyst according to one embodiment of the present invention has a carbon structure in which area ratios of three peaks f, f, and fobtained by separating a peak in the vicinity of a diffraction angle of 26&#xb0; in an X-ray diffraction pattern obtained by powder X-ray diffraction satisfy the following conditions (a) to (c): (a) f: 75% or more and 96% or less; (b) f: 3.2% or more and 15% or less; and (c) f: 0.4% or more and 15% or less.

Carbon catalyst, electrode, and battery

A carbon catalyst has a carbon structure with a crystallite size Lc falling within 0.90 nm or more and 1.20 nm or less calculated through use of a Bragg angle of a diffraction peak fat a diffraction angle 2&#x3b8; of 24.0&#xb0;&#xb1;4.0&#xb0; obtained by separating a diffraction peak in the vicinity of a diffraction angle 2&#x3b8; of 26&#xb0; in an X-ray diffraction pattern obtained by powder X-ray diffraction using a CuK&#x3b1; ray, and a carbon dioxide desorption amount from 650&#xb0; C. to 1,200&#xb0; C. of 97 &#x3bc;mol/g or less, a total of a carbon monoxide desorption amount and a carbon dioxide desorption amount from 650&#xb0; C. to 1,200&#xb0; C. of 647 &#x3bc;mol/g or less, or a carbon monoxide desorption amount from 650&#xb0; C. to 1,200&#xb0; C. of 549 &#x3bc;mol/g or less in a temperature programmed desorption method including measuring a carbon dioxide desorption amount from 25&#xb0; C. to 1,200&#xb0; C.

A cathode, a membrane electrode assembly, and a battery, each has excellent durability. The cathode is a cathode of a battery including an electrolyte membrane, the cathode including: a first layer which contains 0.3 mg/cmor more and 9.0 mg/cmor less of a carbon catalyst; and a second layer which is arranged between the electrolyte membrane and the first layer in the battery, and which contains 0.002 mg/cmor more and 0.190 mg/cmor less of platinum.

A carbon catalyst has: a carbon structure that exhibits a nitrogen desorption temperature range from 800&#xb0; C.-1,000&#xb0; C. of 0.75&#xd7;10mol/g or more or a nitrogen desorption amount in the range from 600&#xb0; C. to 1,000&#xb0; C. of 1.20&#xd7;10mol/g or more in a temperature programmed desorption method including measuring nitrogen desorption amount temperature range from 600&#xb0; C.-1,000&#xb0; C.; a carbon structure exhibits a zeta potential isoelectric point of pH 9.2 or more; or a carbon structure exhibits a ratio of an intensity of a first nitrogen peak within a range of a binding energy of 398.0&#xb1;1.0 eV, to an intensity of a second nitrogen peak having a peak top within a range of a binding energy of 400.5&#xb1;1.0 eV, of 0.620 or more, the first and second nitrogen peaks obtained by separating a peak derived from a 1s orbital of a nitrogen atom in a photoelectron spectrum obtained by X-ray photoelectron spectroscopy.

Carbon catalyst, battery electrode and battery

A battery cathode, a composition for a catalyst layer of a battery cathode, and a battery, each achieves excellent performance while using a non-platinum catalyst. The battery cathode includes a catalyst layer, wherein the catalyst layer contains a non-platinum catalyst, has a thickness of 15 &#x3bc;m or more, and has a conductance per 1 cmof an electrode area of more than 100 S and less than 350 S.

Battery cathode, composition for battery cathode catalytic layer, and battery

A carbon catalyst, a battery electrode, and a battery each having excellent catalytic activity and excellent durability. The carbon catalyst includes iron, exhibits a weight reduction ratio in the temperature range from 200&#xb0; C. to 1,200&#xb0; C. of 12.0 wt % or less measured by thermogravimetric analysis in a nitrogen atmosphere, and has a carbon structure that exhibits, in X-ray absorption fine structure analysis of a K absorption edge of the iron, the following (a) and/or (b): (a) a ratio of a normalized absorbance at 7,130 eV to a normalized absorbance at 7,110 eV is 7.0 or more; and (b) a ratio of a normalized absorbance at 7,135 eV to a normalized absorbance at 7,110 eV is 7.0 or more.

Carbon catalyst, cell electrode, and cell

A battery electrode, a composition for a catalyst layer of a battery electrode, and a battery having excellent characteristics at low cost. The battery electrode includes a catalyst layer containing a non-platinum catalyst and platinum particles not being carried on the non-platinum catalyst, wherein a content of the platinum particles per unit area of the battery electrode is 0.0010 mg/cmor more and 0.1200 mg/cmor less.

Cell electrode, composition for cell electrode catalyst layer, and cell

A method for improving the performance and/or stability of non-precious metal catalysts in fuel cells and other electrochemical devices. Improved membrane electrode assemblies (MEAs) and fuel cells containing the same are provided. Such MEAs include a catalyst layer made up of at least two sub-layers containing ionomers of differing equivalent weights. The sub-layers may optionally contain mixtures of ionomers. Also provided are methods of making and using the described devices.

Multi-layer catalyst design

An electrode for redox flow batteries is produced using a carbon catalyst for redox flow battery electrodes, the carbon catalyst being a particulate carbon catalyst and consisting of carbonaceous particles having a specific surface area of 800 to 2000 m/g and an average particle size of 100 to 1000 nm.

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Funabashi, Japan

Takeaki Kishimoto