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Electrode catalyst layer for fuel cells

An electrode catalyst layer, fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of carbon material specific surface area volume reduction, power generation efficiency reduction, surface area reduction, etc.

Active Publication Date: 2020-10-13
NISSAN MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned heat treatment also leads to a decrease in the specific surface area of ​​the carbon material or the volume of the pores (primary pores) while improving the durability.
Therefore, in the catalyst layer using a heat-treated carbon carrier, there is a problem that the effective surface area for the reaction is reduced, and the power generation efficiency is reduced.

Method used

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  • Electrode catalyst layer for fuel cells
  • Electrode catalyst layer for fuel cells
  • Electrode catalyst layer for fuel cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] (1) Fabrication of Membrane Electrode Assembly (MEA)

[0145] (a) Anode catalyst layer

[0146]As a porous carrier used in the negative electrode side catalyst layer, carbon black (Ketchen Black, EC300J manufactured by "Ketchen Black Internasional" was prepared, particle size: 30 nm, BET specific surface area: 800 m 2 / g), it is heat-treated under an inert gas atmosphere, thereby making a product with Table 3 and Figure 5 Carrier with empty pore distribution shown. In addition, the pore distribution of the porous carrier was measured at 77K (liquid nitrogen temperature) based on the nitrogen adsorption method after pretreatment of BELSORP18PLUS-HT manufactured by "Nippon Bell" at 90°C for about 5 hours under reduced pressure and degassing. Measured below. The analysis of the pore size distribution was performed by the DH method.

[0147] Platinum (Pt) having a particle size of 2.5 nm was carried as a catalyst on this porous carrier so that the supporting ratio of t...

Embodiment 2 to 3、 comparative example 1

[0159] In addition to changing the heat treatment conditions of the porous carrier of the negative electrode catalyst layer, the prepared Figure 5 A single cell for evaluation was produced by the same method as in Example 1 above, except for the carrier having the shown pore distribution.

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Abstract

To provide a catalyst layer for a fuel cell, which exhibits excellent power generation performance even in the case of reducing the used amount of a catalyst. It is an electrode catalyst layer for a fuel cell comprising a catalyst, a porous carrier for supporting the above-mentioned catalyst, and a polymer electrolyte, in which a mode diameter of the pore distribution of the above-mentioned porous carrier is 4 to 20 nm, and the above-mentioned catalyst is supported in a pore with a pore diameter of 4 to 20 nm of the above-mentioned porous carrier.

Description

technical field [0001] The present invention relates to a catalyst layer for a fuel cell, and more specifically, to a catalyst layer for a fuel cell that improves the power generation performance of a fuel cell. Background technique [0002] In recent years, in response to social needs and trends against the backdrop of energy and environmental issues, fuel cells have attracted attention as driving sources for vehicles and stationary power sources. Fuel cells are classified into various types according to the type of electrolyte, the type of electrodes, etc., and typical ones include alkali type, phosphoric acid type, molten carbonate type, solid electrolyte type, and solid polymer type. Among them, solid polymer fuel cells (PEFCs) that can operate at low temperatures (usually 100°C or less) have attracted widespread attention, and in recent years, development and practical use of them as low-pollution power sources for automobiles have been progressing. [0003] The struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/92H01M8/1004
CPCC07D303/38H01M4/583H01M4/86H01M4/9075H01M4/926H01M2008/1095Y02E60/10Y02E60/50H01M8/1004
Inventor 铃江祥典小野义隆井殿大大间敦史
Owner NISSAN MOTOR CO LTD
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