Manufacturing method of membrane electrode of novel ultrathin proton exchange membrane fuel cell

Abstract

The invention discloses a manufacturing method of a membrane electrode of a novel ultrathin proton exchange membrane fuel cell, and the method comprises the following manufacturing processes: firstly manufacturing a piece of hydrophobic carbon paper, then sputtering a nickel catalyst layer on the carbon paper, using a plasma enhanced chemical vapor deposition method to manufacture a directional carbon nano tube, and sputtering platinum nano particles or platinum ruthenium particles on the directional carbon nano tube to form an electrode; then depositing a plasma polymerized proton exchange membrane on an electrode surface; and finally assembling two plasma polymerized proton exchange membranes with electrodes into the membrane electrode of the novel ultrathin proton exchange membrane fuel cell. The plasma polymerized proton exchange membrane is ultrathin in structure and capable of improving the usage rate of the catalyst, reducing the contact resistance of the membrane and the electrode and the conducting path of the proton, and improving the performance of the fuel cell, and has self-humidifying capacity so as to reduce the production cost of the fuel cell. By using a drying plasma technology, the manufacturing method has the characteristics of environmental friendliness and low cost.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and in particular relates to a preparation method of a novel ultrathin proton exchange membrane fuel cell membrane electrode. Background technique [0002] Proton Exchange Membrane Fuel Cells (PEMFC), which can directly convert the free energy of chemical reactions into electrical energy through the membrane electrode (Membrane Electrode Assembly, MEA) system, has a high energy conversion rate (40-60%), and is environmentally friendly. Friendly, long working life, low operating temperature and other advantages, PEMFC (Proton Exchange Membrane Fuel Cell, or PEMFC) as a new generation of energy technology has broad application prospects and huge market potential. PEMFC can be applied wherever energy and power are needed. Various PEMFC products will penetrate into all walks of life in society and even ordinary families, and its broad application prospects can be compared ...

AI Technical Summary

Problems solved by technology

The disadvantages are (1) During the working process, it is easy to peel off the catalytic layer and the membrane due to the difference in swelling between the electrode catalytic layer and the membrane, which is mainly reflected in the fact that due to the hydrophilicity of the Nafion membrane, when the catalyst is directly deposited on the Nafion membrane. Under the action of the proton exchange membrane, the proton exchange membrane expands and deforms, which affects the control of the electrode size; (2) The thickness of the catalytic layer is difficult to control accurately, and it is not suitable to make a MEA with a large area; (3) Although the supports of the catalytic layer are different, the single From the perspective of the composition of the catalytic layer, CCM is also a kind of hydrophilic electrode

Therefore, the problem of the electrode with this structure is the same as that of the hydrophilic electrode, and it is easy to produce the phenomenon of "water flooded electrode" under high current density.

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