Patent application number | Description | Published |
20080241641 | Membrane electrode assembly for fuel cell and process for manufacturing the same - A membrane electrode assembly for fuel cell includes a membrane, a cathode electrode layer, a cathode gas diffusion layer, an anode electrode layer, and an anode gas diffusion layer. At least one of the cathode electrode layer and the anode electrode layer includes a catalytic layer, and a water-repellent layer. The catalytic layer contains first electrically-conductive fibers and a catalyst, and is disposed on a side of the membrane in the thickness-wise direction of the membrane electrode assembly. The water-repellent layer contains second electrically-conductive fibers and a water repellent, and is disposed more away from the membrane than the catalytic layer is disposed in the thickness-wise direction of the membrane electrode assembly. The first electrically-conductive fibers exhibit a first fibrous average length. The second electrically-conductive fibers exhibit a second fibrous average length. The first average fibrous length is longer than the second average fibrous length. | 10-02-2008 |
20090325795 | METHOD FOR PRODUCING PLATINUM NANOPARTICLES - A producing method includes a preparing step of preparing a chemical compound having at least one of elements of alkali metals and alkali earth metals along with platinum, and a reducing step of reducing the prepared chemical compound with a reducing agent to form platinum nanoparticles. | 12-31-2009 |
20100304240 | MEMBRANE ELECTRODE ASSEMBLY FOR FUEL CELL, FUEL CELL, AND FUEL CELL SYSTEM - A membrane electrode assembly includes an ion conducting membrane; an anode catalyst layer arranged on one side of the ion conducting membrane; a cathode catalyst layer arranged on the other side of the ion conducting membrane; an anode diffusion layer arranged on an outer side of the anode catalyst layer; and a cathode diffusion layer arranged on an outer side of the cathode catalyst layer. Only in the anode catalyst layer, the density of a first catalyst layer portion located close to the anode diffusion layer is smaller than the density of a second catalyst layer portion located close to the ion conducting membrane. | 12-02-2010 |
20120301663 | CARBON NANOTUBE COMPOSITE AND METHOD FOR MAKING THE SAME - Disclosed are a carbon nanotube composite and a method for making the same advantageous for achieving a higher density of a carbon nanotube assembly. The carbon nanotube composite includes a substrate and a carbon nanotube assembly mounted on the surface of the substrate. The carbon nanotube assembly is composed of multiple carbon nanotubes arranged densely in parallel oriented in the direction upward from the surface of the substrate. The carbon nanotube assembly has a density of 70 mg/cm | 11-29-2012 |
20130136982 | ELECTROCHEMICAL DEVICE USING MAGNESIUM ELEMENT-CONTAINING NEGATIVE ELECTRODE - An electrochemical device includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, wherein the negative electrode contains a magnesium element, and wherein the nonaqueous electrolytic solution is one obtained after dipping metallic lithium for a predetermined time period. | 05-30-2013 |
20130156956 | CARBON NANOTUBE PRODUCTION METHOD - A carbon nanotube production method forms a carbon nanotube aggregate having a high perpendicular orientation characteristic where a plurality of carbon nanotubes are aligned in a direction perpendicular to a surface of a substrate, without using terpineol, which is a viscosity improver. A catalyst solution having a predetermined concentration (from 0.2 M to 0.8 M) of a transition metal salt dissolved therein, and free of terpineol is prepared. Catalyst particles are caused to be present on the surface of the substrate by making the catalyst solution contact with the surface of the substrate. By making a carbon nanotube forming gas contact with the surface of the substrate in a carbon nanotube forming temperature region, the carbon nanotube aggregate is grown on the surface of the substrate where a plurality of carbon nanotubes are aligned in the direction perpendicular to the surface of the substrate. | 06-20-2013 |
20140127586 | ALIGNED CARBON NANOTUBE ASSEMBLY, CARBON-BASED ELECTRODE, POWER STORAGE DEVICE, AND METHOD OF MANUFACTURING ALIGNED CARBON NANOTUBE ASSEMBLY - The present invention provides an aligned carbon nanotube assembly constituted of carbon nanotubes each having a defective pore on its side surface, a method of manufacturing the aligned carbon nanotube assembly, a carbon-based electrode, and a power storage device. The aligned carbon nanotube assembly is formed by aggregating a large number of carbon nanotubes aligned in parallel along the same direction and having parallel orientation. In such a state that the aligned carbon nanotube assembly remains grown, the carbon nanotube constituting the aligned carbon nanotube assembly has a defective pore on its side surface. In a raman spectrum of the aligned carbon nanotube assembly in a Raman spectrometric method, when intensity of scattered light in D-band is represented by I | 05-08-2014 |
20140294715 | METHOD OF MANUFACTURING FERROUS OXIDE NANOPARTICLE, METHOD OF FORMING CARBON NANOTUBE, AND FERROUS OXIDE NANOPARTICLE - A method of manufacturing a ferrous oxide nanoparticle includes a water removing step raising temperature of a solution containing an iron oxide, an organic acid dissolving the iron oxide, and a first solvent to a first temperature and removing water in the solution, a second temperature maintaining step raising the first temperature to a second temperature and maintaining the second temperature, and a particle extracting step extracting the ferrous oxide nanoparticle from the solution after the second temperature maintaining step. | 10-02-2014 |