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51. 发明专利

JPH11138020A HONEYCOMB-LIKE CATALYST CARRIER AND PRODUCTION THEREOF 失效
公开(公告)号：JPH11138020A
公开(公告)日：1999-05-25
申请号：JP32041497
申请日：1997-11-05
申请人： TOYOTA MOTOR CORP
发明人： NEGISHI YOSHIMASA , MIZUNO SEIJI , KAWAHARA TATSUYA , YOSHIMURA TSUNEJI
IPC分类号： B01J35/04
摘要： PROBLEM TO BE SOLVED: To improve the catalytic reaction efficiency and durability of a catalyst carrier. SOLUTION: A catalyst carrier is provided with a pore 33 in which divisions are formed by a corrugated plate 32 and a plane plate 31, and the pore 33 has an upper catalytic layer 34, a lower catalytic layer 36, an inside catalytic layer 35, and an outside catalytic layer 37. These catalytic layers are formed by the reduction of applied layers which have been formed via the print of a binder solution of a catalyst material powder (a Cu-Zn powder), or the like. The applied layers are respectively formed on the plane plate 31 and the corrugated plate 32 in a state of a plate body. In that case, the applied layer is not formed in the area which corresponds to a corner area 38 formed when the plane plate 31 was connected with the corrugated plate 32.

52. 发明专利

JPH09245800A FUEL CELL AND ELECTRODE FOR FUEL CELL 失效
公开(公告)号：JPH09245800A
公开(公告)日：1997-09-19
申请号：JP8093596
申请日：1996-03-08
申请人： TOYOTA MOTOR CORP
发明人： AZEYANAGI NAOKO , KAWAHARA TATSUYA
IPC分类号： H01M4/86 , H01M8/02 , H01M8/04 , H01M8/10
摘要： PROBLEM TO BE SOLVED: To improve water discharge property of generated water and supply property for an electrolyte layer and ensure gas transmission in a fuel call anode. SOLUTION: An electron base material constituting a cathode 23 is made of carbon cross to which hydrophilic treatment is applied, and a hydrophilic part 60 is formed. The cathode 23 is provided with an electrolyte film side water repellent part 62 on the surface of the side of an electrolyte film and is provided with a gas flow route side water repellent part 64 on the surface of the side of a gas flow route. Part of the generated water generated by means of battery reaction is repelled by the electrolyte film side water resistance part 62 and is pushed back to the electrolyte film, and the electrolyte film is prevented from being dried. The residual generated water is absorbed by the hydrophilic part 60, is guide to the gas flow route side, and evaporates in gas oxide. In addition, gas divergence of the gas oxide is improved by water repellency provided with the electrolyte film side water repellent part 62.

53. 发明专利

JPH0888008A FUEL CELL AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0888008A
公开(公告)日：1996-04-02
申请号：JP25139094
申请日：1994-09-19
申请人： TOYOTA MOTOR CORP
发明人： KAWAHARA TATSUYA , MIZUNO SEIJI
IPC分类号： H01M4/86 , H01M4/88 , H01M8/02 , H01M8/10
摘要： PURPOSE: To further enhance layer the battery performance. CONSTITUTION: Electrode catalyst layer forming paste prepared by mixing a catalyst carrying carbon in a polymer electrolyte solution and an organic solvent is dripped on the surface of a Teflon sheet, and a paste printed material with uniform thickness is formed with a doctor blade. When the paste printed material stands within a sealed container, the catalyst carrying carbon is precipitated and stacked on the Teflon sheet. The polymer electrolyte solution is left as a supernatant liquid of the stacked layer. When a thin film is formed by drying, on the upper surface side of the film, the amount of the polymer electrolyte is increased and voids between the catalyst carrying carbon particles are made small, and on the bottom side of the film, the amount of the polymer electrolyte is decreased and the voids are made large. The film becomes an electrode catalyst layer formed by stacking the catalyst carrying carbon particles, and the side having the large amount of polymer electrolyte is brought into close contact with an electrolyte film 10, and the side having large voids is brought into close contact with a cathode 50. The conductivity of hydrogen ions on the interface with the electrolyte film is enhanced, and the diffusion permeability of a reaction gas on the interface with an electrode is enhanced.

54. 发明专利

JPH07320755A FUEL CELL 失效
公开(公告)号：JPH07320755A
公开(公告)日：1995-12-08
申请号：JP13510494
申请日：1994-05-24
申请人： TOYOTA MOTOR CORP
发明人： KAWAHARA TATSUYA
IPC分类号： H01M8/02 , H01M8/04 , H01M8/10
摘要： PURPOSE:To improve cell performance by uniformly keeping the humidity within the surface of a cell. CONSTITUTION:An electrolytic film 10 is laid along a cell nipped by an anode 20 and a cathode 30 to form a fuel gas passage groove 40 and an oxidized gas passage groove 50. Both the passage grooves 40, 50 are formed of separators 60, 70 with ribs, and the separator 60 has a cooling plate 90. The cooling plate 90 has a plurality of passage grooves 80 divided into two groups, the both the groups are constituted so that the space between the passage grooves are increased as they get closer to the central part side, and two systems of temperature regulating water differed in temperature are carried to both the groups. A temperature gradient is caused in the cooling plate 90 by this constitution. The passage of the fuel gas passage groove 40 is determined in the direction extending front the high temperature part of the temperature gradient to the low temperature part side. In a fuel cell 1, therefore, saturated steam quantity can be reduced, for fuel gas, according to its reduction in temperature, whereby the relative humidity is gradually enhanced toward the outlet side of the fuel gas passage groove 40.

55. 发明专利

JPH07134995A FUEL CELL 失效
公开(公告)号：JPH07134995A
公开(公告)日：1995-05-23
申请号：JP27996193
申请日：1993-11-09
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP
发明人： HAGA TETSUYA , ASAOKA MASAHIKO , SUZUKI TAKANAO , KAWAHARA KAZUO , ABE KATSUJI , KAWAHARA TATSUYA
IPC分类号： H01M4/96 , H01M4/86 , H01M4/88 , H01M8/10
摘要： PURPOSE:To provide a polymer electrolyte fuel cell capable of controlling water absorbing/removing capability to enhance stability by modifying surface structure characteristics of carbon particles which are a catalyst supporter on a fuel electrode side and an air electrode side. CONSTITUTION:A fuel cell consists of an electrolyte film made of a solid polymer, a fuel electrode and an air electrode placed on both sides of the electrolyte film, and the fuel electrode and the air electrode have a catalyst layer arranged so as to come in contact with the electrolyte film surface respectively. Carbon particles in the catalyst layer of the air electrode are supported with catalysts, then the surfaces of carbon particles are treated so that their hydrophilic natures are decreased, and carbon particles in the catalyst layer of the fuel electrode are previously given hydrophilic functional groups, then supported with catalysts. The fuel cell with less output drop in high current density region and high performance can be provided.

56. 发明专利

JPH06191921A STABILIZATION OF DISPERSION OF SLURRY FOR FORMING CERAMICS 失效
公开(公告)号：JPH06191921A
公开(公告)日：1994-07-12
申请号：JP34378692
申请日：1992-12-24
申请人： TOYOTA MOTOR CORP
发明人： KAWAHARA TATSUYA
IPC分类号： B01F17/52 , B28C1/04 , C04B35/00 , C04B35/622 , C08F290/00 , C08F299/02
摘要： PURPOSE:To provide a process for stabilizing the dispersion of a slurry for forming ceramics, effective for suppressing the variation of the viscosity of slurry having excellent standing stability and enabling easy and sure forming of a ceramic article. CONSTITUTION:Ceramic powder having 1-2 water molecules preparatorily adsorbed to the surface based on one Si-OH group is used when a copolymer of a polyoxypropylene alkyl ether and maleic anhydride is used as a dispersing agent. Water molecules are adsorbed to the surface of ceramic powder in advance and the acid anhydride group of the dispersing agent is hydrolyzed on the surface of the ceramic powder to form two carboxyl groups and, at the same time, to effect the adsorption of the groups to the surface.

57. 发明专利

JPH05221710A CERAMIC MOLDING COMPOSITION 失效
公开(公告)号：JPH05221710A
公开(公告)日：1993-08-31
申请号：JP2951092
申请日：1992-02-17
申请人： TOYOTA MOTOR CORP
发明人： KAWAHARA TATSUYA
IPC分类号： C04B35/622 , C04B35/00 , C04B35/632
摘要： PURPOSE:To enhance gel strength and to reduce defects in a molded body and a sintered body at the time of using a compsn. in which an org. solvent is gelatinized to mold ceramic powder. CONSTITUTION:This ceramic molding compsn. contains ceramic powder, an org. solvent, a dispersant, a fatty acid contg. a hydroxy group or a deriv. thereof as a gelatinizer and a cross-linking agent having >=5,000wt. average mol.wt. and contg. two or more functional groups which bond to the gelatinizer by hydrogen bond.

58. 发明专利

JP2001266901A ELECTRODE CATALYST SOLUTION FOR FUEL CELL AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001266901A
公开(公告)日：2001-09-28
申请号：JP2000079952
申请日：2000-03-22
申请人： TOYOTA MOTOR CORP
发明人： MIZUNO SEIJI , KAWAHARA TATSUYA
IPC分类号： B01J21/18 , B01J23/42 , B01J37/02 , H01M4/88 , H01M8/10
摘要： PROBLEM TO BE SOLVED: To improve a forming work of a catalyst electrode and a performance of a fuel cell. SOLUTION: Catalyst carrying carbons are dispersed in a mixed solution (10 to 60% aqueous solution) of azeotropic solvent which has an azeotropic boiling point 130 deg.C or less when it is made as an aqueous solution even if it has a boiling point higher than water and ion-exchange water (process S1), and an electrolytic solution containing a solid content of electrolyte is added to the mixed solution at a weight ratio of 1:2 to 2:1 to the catalyst carrying carbons (process S2), and further, the solution is adjusted so that the viscosity becomes 30 to 200 cps and the water content becomes 10 to 30% by adding a solvent such as ethanol or the like (process S3), and an electrode catalyst solution is obtained. If the provided electrode catalyst solution is used as an ink in the case of forming a catalyst layer by printing, a superior printability and drying ability can be obtained and a transfer to the solid polymer electrolyte membrane of catalyst layer and a performance as a fuel cell are also can be improved.

59. 发明专利

JPH11204128A FUEL CELL 失效
公开(公告)号：JPH11204128A
公开(公告)日：1999-07-30
申请号：JP1511298
申请日：1998-01-09
申请人： TOYOTA MOTOR CORP
发明人： KAWAHARA TATSUYA
IPC分类号： H01M8/24
摘要： PROBLEM TO BE SOLVED: To simplify formation, miniaturization of a device and decrease cost, from the standpoint of improving the operational efficiency of a fuel cell. SOLUTION: Each stacked single cells 11 has a flow-adjusting mechanism 40 in a discharge path 26a of air (electrode passing air), which passes through a gas-diffusion electrode 16 (anode) along its electrode surface. The flow- adjusting mechanism 40 has a gas-humidity inductive member 41, which is exposed to the electrode passing air and also expands or contracts corresponding to the air humidity, and a gas shielding member 42 which is supported by the gas-humidity inductive member 41 and is movable along an edge inclined surface 12b. Therefore, when air is supplied to a cell electrode 14, the gas-humidity inductive member 41 expands or contracts spontaneously corresponding to the air humidity, and the gas shielding member 42 is moved along the edge inclined surface 12b, following the expansion or the contraction. Consequently, an interval between a shielding part 44 of the gas shielding member 42 and an edge under surface 12a of a separator 12, namely, the opening width of the discharge bath 26a, is changed from Ka to Kb or Kc, to thereby adjust the flow of the air passing through the anode.

60. 发明专利

JPH1143305A CATALYTIC REACTION DEVICE AND GAS DISTRIBUTING DEVICE 失效
公开(公告)号：JPH1143305A
公开(公告)日：1999-02-16
申请号：JP21411397
申请日：1997-07-23
申请人： TOYOTA MOTOR CORP
发明人： NEGISHI YOSHIMASA , TAKI MASAYOSHI , KAWAHARA TATSUYA
IPC分类号： C01B3/38 , H01M8/06
摘要： PROBLEM TO BE SOLVED: To aim at the improvement of a reaction efficiency in a catalyst layer and the size reduction of device therefor. SOLUTION: This catalytic reaction device 20 has a rectification mechanism part 24 in front of a honeycomb type catalyst layer 26 formed with gas passages horizontally. The rectifying mechanism part 24 is equipped with first to third multiply- perforated plates arranged as a file at an approximately 2-5 mm pitch so as to cross a gas introduction tube part 23. Although each multiplyperforated plate has plural holes, the positions of the holes of the first multiply-perforated plate 31 are arranged so as not to overlap with the gas introduction tube part 23 in the flowing direction of a gas and also the positions of the holes in the adjacent multiply perforated plates are arranged so as not to overlap each other in the direction of the flowing gas. Also, the number of holes in the first to the third multiply-perforated plates is made more in the more down stream side multiply perforated plate, and also the diameter of the holes of each multiply-perforated plate is made smaller in the more down stream side multiply-perforated plate. Thus, a mixed gas collides with the multiply-perforated plate in the down stream side after passing through the holes of each multiply- perforated plate, spreads along the surface of the multiply perforated plate and then passes through the holes of the multiply-perforated plate.

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