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Electrode catalyst dispersion and ink composition

An electrode catalyst, ink composition technology, applied in battery electrodes, electrochemical generators, circuits, etc., can solve the problems of not reaching a sufficient level, reducing the area-to-weight ratio of carbon black, and impossible to achieve electricity generation, etc. The effect of increasing the amount of catalyst and excellent durability

Inactive Publication Date: 2011-01-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this catalyst improved the corrosion resistance of the support to some extent, but still not to a sufficient level
Also, since increasing the degree of graphitization reduces the area-to-weight ratio of carbon black, platinum cannot be highly dispersed on carbon black, making it impossible to achieve sufficient power generation

Method used

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  • Electrode catalyst dispersion and ink composition
  • Electrode catalyst dispersion and ink composition
  • Electrode catalyst dispersion and ink composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0192] Example 1 (Pt-perylene catalyst)

[0193] 1 gram of the Pt-perylene catalyst obtained by the above steps together with 0.95 gram of ion-conducting polymer (trade name: Nafion DE1021-10% aqueous solution, DuPont product) and 5.38 gram of 1,1,1,3,3 , 3-hexafluoro-2-propanol (product of Wako Pure Chemical Industry Co., Ltd.) were put into a reagent bottle together, and then 3 g of zirconia beads (0.8 mm in diameter) were added, and the reagent bottle was sealed and shaken with a paint shaker for 1 hours to produce a catalyst-dispersed ink composition.

example 2 and 3

[0194] Examples 2 and 3 (Pt-perylene catalyst)

[0195] 1 gram of the Pt-perylene catalyst obtained by the above steps together with 0.6 gram of ion-conducting polymer (trade name: Nafion DE1021-10% aqueous solution, DuPont product) and 3.4 grams of 1,1,1,3,3 , 3-hexafluoro-2-propanol (product of Wako Pure Chemical Industry Co., Ltd.) were put into a reagent bottle together, and then 3 g of zirconia beads (0.8 mm in diameter) were added, and the reagent bottle was sealed and shaken with a paint shaker for 1 hours to produce a catalyst-dispersed ink composition.

example 4

[0196] Example 4 (Pt-perylene catalyst)

[0197] 1 gram of the Pt-perylene catalyst obtained by the above steps together with 0.35 gram of ion-conducting polymer (trade name: Nafion DE1021-10% aqueous solution, DuPont product) and 1.98 gram of 1,1,1,3,3 , 3-hexafluoro-2-propanol (product of Wako Pure Chemical Industry Co., Ltd.) were put into a reagent bottle together, and then 3 g of zirconia beads (0.8 mm in diameter) were added, and the reagent bottle was sealed and shaken with a paint shaker for 1 hours to produce a catalyst-dispersed ink composition.

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Abstract

There is provided an electrode catalyst layer that has excellent durability compared to conventional electrode catalyst layers employing carbon supports, and that can minimize as much as possible the amount of catalyst material used while exhibiting desired output, by allowing adjustment of the amount as necessary. The electrode catalyst dispersion of the disclosure comprises catalyst particles that contain a non-conductive support and a conductive catalyst material covering the surface of non-conductive support, and a dispersing medium selected from among water, organic solvents and combinations thereof. The ink composition of the disclosure comprises catalyst particles containing a non-conductive support and a conductive catalyst material covering the surface of non-conductive support, a dispersing medium selected from among water, organic solvents and combinations thereof, and an ionic conductive polymer, wherein the volume ratio of the catalyst particles and the ionic conductive polymer is 55:45-90:10. There is further provided an electrode catalyst layer.

Description

technical field [0001] The present invention relates to an electrode catalyst dispersion, an ink composition, an electrode catalyst layer formed using the electrode catalyst dispersion or the ink composition, and uses thereof. In particular, the present invention relates to an electrode catalyst dispersion containing catalyst particles and an ink composition usable for an electrode catalyst layer in a polymer electrolyte fuel cell, a production method thereof, and an electrode catalyst formed using the electrode catalyst dispersion or ink composition layer and uses such as polymer electrolyte membranes or gas diffusion layers containing such electrode catalyst layers, membrane electrode assemblies and polymer electrolyte fuel cell stacks. Background technique [0002] A carbon-supported platinum catalyst in which a catalyst metal such as platinum or a platinum-based alloy is supported on a carbon-based conductive material having a large area-to-weight ratio such as carbon bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M4/86H01M4/88
CPCH01M4/8828H01M4/92H01M4/8882H01M4/8807Y02E60/521H01M4/8605H01M4/8657H01M8/1004H01M4/881H01M4/925H01M4/9075H01M4/8814H01M8/102Y02P70/50Y02E60/50
Inventor 野田一树冈田秀幸
Owner 3M INNOVATIVE PROPERTIES CO
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