Catalytic electrode for proton exchange membrane fuel cell, battery with same and preparation method

Abstract

The invention relates to a catalytic electrode of a proton exchange membrane fuel cell, a cell provided with the same and a preparation method thereof. The catalytic electrode comprises a conductive carrier layer with a net-shaped structure, and a proton conductive monomer and a catalyst which are located on the surface of the conductive carrier layer and in the net-shaped structure; the thickness of the conductive carrier layer is 1-10 microns; the cell provided with the catalytic electrode adopts the catalytic electrode to replace a cathode catalyst layer; the preparation method comprises the following steps of: S1, manufacturing the conductive carrier layer; S2, supporting a catalyst; S3, supporting the proton conductive monomer; and S4, transferring the conductive carrier layer. Almost catalysts, the proton conductive monomer and a pore can form an effective three-phase interface and the utilization efficiency of the catalyst is greatly improved; a water flooding phenomenon caused by the fact that the thickness smaller than 1 micron does not occur and a phenomenon that the conductive property is decreased, caused by the fact that the thickness is more than 10 microns also does not occur; the fuel cell adopting the catalyst can keep relatively long service life in a frequent starting-stopping automobile application environment.

Description

technical field

[0001] The invention relates to the field of proton exchange membrane batteries, in particular to a catalytic electrode of a proton exchange membrane fuel cell, a battery with the same and a preparation method. Background technique

[0002] A proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy of hydrogen into electrical energy through an electrochemical reaction. It has the advantages of zero emission, no pollution and high fuel efficiency. The basic reaction principle of the proton exchange membrane fuel cell is that the fuel gas hydrogen undergoes a hydrogen oxidation reaction at the anode and loses electrons to become protons. After combining with water, the protons migrate to the cathode through the proton exchange membrane, and generate oxygen with oxygen and electrons from the external circuit. The reduction reaction (Oxygen Reduction Reaction, ORR) produces water, and the electrons form a...

Examples

Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 The catalytic electrode of a proton exchange membrane fuel cell shown includes a conductive support layer in a network structure, a proton conductive monomer 23 and a catalyst 22 located on the surface of the conductive support layer and inside the network structure, and the conductive support layer The thickness is 1 to 10 μm. The conductive carrier layer is formed by mixing multi-walled carbon nanotubes and carbon nanofibers 21, so that its interior presents a porous structure, and its porosity is adjusted to 80-90%, and its specific surface area is 50-200m 2 / g. On the outer walls of the multi-walled carbon nanotubes and carbon nanofibers 21 (that is, on the surface of the conductive support layer and inside the pores), the catalyst 22 and the proton-conducting monomer 23 are supported; the catalyst 22 is either Pt particles or Pt alloy p...

technical field

[0001] The invention relates to the field of proton exchange membrane batteries, in particular to a catalytic electrode of a proton exchange membrane fuel cell, a battery with the same and a preparation method. Background technique

[0002] A proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy of hydrogen into electrical energy through an electrochemical reaction. It has the advantages of zero emission, no pollution and high fuel efficiency. The basic reaction principle of the proton exchange membrane fuel cell is that the fuel gas hydrogen undergoes a hydrogen oxidation reaction at the anode and loses electrons to become protons. After combining with water, the protons migrate to the cathode through the proton exchange membrane, and generate oxygen with oxygen and electrons from the external circuit. The reduction reaction (Oxygen Reduction Reaction, ORR) produces water, and the electrons form a...

Examples

Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 The catalytic electrode of a proton exchange membrane fuel cell shown includes a conductive support layer in a network structure, a proton conductive monomer 23 and a catalyst 22 located on the surface of the conductive support layer and inside the network structure, and the conductive support layer The thickness is 1 to 10 μm. The conductive carrier layer is formed by mixing multi-walled carbon nanotubes and carbon nanofibers 21, so that its interior presents a porous structure, and its porosity is adjusted to 80-90%, and its specific surface area is 50-200m 2 / g. On the outer walls of the multi-walled carbon nanotubes and carbon nanofibers 21 (that is, on the surface of the conductive support layer and inside the pores), the catalyst 22 and the proton-conducting monomer 23 are supported; the catalyst 22 is either Pt particles or Pt alloy p...

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