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Electrode material and application thereof

An electrode material and fuel cell technology, applied in battery electrodes, solid electrolyte fuel cells, circuits, etc., can solve problems such as battery performance degradation

Inactive Publication Date: 2019-11-15
SAKAI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such solid polymer fuel cells are used for example in automobiles, large load fluctuations caused by starting and stopping, etc. will lead to the oxidation reaction of carbon (C+2H 2 O→CO 2 +4H + +4e - )
For example, when the potential of the cathode is 0.9V or higher, the oxidation reaction of carbon is easy to proceed. In this case, the platinum on the carbon will accumulate and fall off, so the performance of the battery will drop significantly.

Method used

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  • Electrode material and application thereof
  • Electrode material and application thereof
  • Electrode material and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0103] The method of mixing the above-mentioned components, that is, the method of preparing the above-mentioned mixed solution is not particularly limited, and examples thereof include adding a solution of a noble metal compound or a noble metal while stirring a slurry containing the product obtained in step (1) in a container. Dispersion, the method of stirring and mixing. The temperature at the time of addition is preferably 40° C. or lower, and it is preferable to heat to a predetermined temperature while stirring and mixing. The mixing may be performed using a stirrer with a stirrer, or a stirrer equipped with a propeller-type, paddle-type or other stirring blades may be used.

[0104] The aforementioned slurry also contains a solvent.

[0105] It does not specifically limit as a solvent, For example, water, an acidic solvent, an organic solvent, and these mixtures are mentioned. Examples of organic solvents include alcohol, acetone, dimethyl sulfoxide, dimethylformamid...

Embodiment 1

[0161] Rutile-type titanium oxide (manufactured by Sakai Chemical Industry Co., Ltd., trade name "STR-100N", specific surface area 100m 2 / g) 2.0g is put into an alumina boat, and 100% ammonia gas is circulated at 400ml / min in the atmosphere roasting furnace. to room temperature to obtain titanium oxynitride powder (t1).

[0162] 0.60 g of the obtained titanium oxynitride powder (t1) and 128 g of ion-exchanged water were weighed into a beaker and stirred and mixed to obtain a titanium oxynitride slurry.

[0163] In another beaker, 1.3 g of an aqueous solution of chloroplatinic acid (15.343% as platinum, manufactured by Tanaka Kikinzoku Industries Co., Ltd.) was diluted with 8.0 g of ion-exchanged water, and then hydrazine chloride (manufactured by Tokyo Chemical Industry Co., Ltd., commercial product) was added. name "Hydrazine Dihydrochloride") 0.053 g, stirred and mixed to prepare a mixture thus obtained (this is referred to as "mixed aqueous solution").

[0164] While sti...

Embodiment 2

[0167] 0.72 g of the titanium oxynitride powder (t1) obtained in Example 1 and 128 g of ion-exchanged water were weighed into a beaker, stirred and mixed to obtain a titanium oxynitride slurry.

[0168] In another beaker, 0.54 g of an aqueous solution of chloroplatinic acid (15.343% as platinum, manufactured by Tanaka Kikinzoku Industries Co., Ltd.) was diluted with 3.2 g of ion-exchanged water, and then hydrazine chloride (manufactured by Tokyo Chemical Industry Co., Ltd., commercial product) was added. name "Hydrazine Dihydrochloride") 0.022 g, stirred and mixed to prepare a mixture thus obtained (this is referred to as "mixed aqueous solution").

[0169] While stirring the titanium oxynitride slurry, the entire amount of the prepared mixed aqueous solution was added to a separate beaker, and then stirring and mixing were performed while heating and maintaining the liquid temperature to 70°C. Furthermore, 3.0 ml of a 1N aqueous sodium hydroxide solution was added and mixed w...

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Abstract

The present invention provides an electrode material having high electroconductivity and high oxygen reduction activity. In addition, the invention provides a fuel cell and an electrode material composition using such an electrode material. The present invention pertains to the electrode material which has a structure wherein a noble metal and / or an oxide thereof is supported by titanium oxynitride or a complexed compound of titanium oxynitride and titanium oxide. The titanium oxynitride or the complexed compound of titanium oxynitride and titanium oxide is in powder form. The electrode material satisfies (I) and (II) in terms of the pore diameter distribution thereof. (I) The ratio (b / a) is 0.9 or greater, where a is the peak surface area in the range of pore diameters from 0 to 180 nm, and b is the peak surface area in the range of pore diameters from 50 to 180 nm, as calculated from the log-differentiated pore volume distribution. (II) The integrated pore volume from 50 to 180 nm is0.1 cm<3> / g or greater.

Description

technical field [0001] The present invention relates to electrode materials and uses thereof. More specifically, it relates to an electrode material, an electrode material composition using the same, and a fuel cell. Background technique [0002] Fuel cells are devices that electrochemically react fuels such as hydrogen and alcohol with oxygen to generate electricity. According to electrolytes, operating temperatures, etc., they are divided into solid polymer type (PEFC), phosphoric acid type (PAFC), molten carbonate type ( MCFC), solid oxide type (SOFC), etc. For example, solid polymer fuel cells are used in stationary power sources and fuel cell vehicles, and it is required to maintain desired power generation performance over a long period of time. [0003] A solid polymer fuel cell is a fuel cell using an ion-conductive polymer membrane (ion-exchange membrane) as an electrolyte, and a material (Pt / C) in which platinum is supported on a carbon carrier is generally used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/92H01M8/10
CPCH01M4/923H01M2008/1095H01M4/925Y02E60/50H01M4/86H01M4/88H01M4/92H01M8/10Y02P70/50H01M4/8605H01M4/8817
Inventor 矢野诚一堤裕司岸美保植村启宏太田麻友
Owner SAKAI CHEM IND CO LTD
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