Membrane electrode complex of direct methanol fuel cell and preparation method and direct methanol fuel cell thereof

A membrane-electrode composite and methanol fuel cell technology, which is applied in fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve problems affecting battery life, stability problems, and DMFC performance degradation, etc.

Inactive Publication Date: 2012-02-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although the above method can reduce the permeability of methanol fuel, it will cause a decrease in the proton conductivity of the proton exchange membrane, resulting in a decrease in the performance of DMFC, problems in stability, and at the same time affecting battery life.

Method used

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  • Membrane electrode complex of direct methanol fuel cell and preparation method and direct methanol fuel cell thereof
  • Membrane electrode complex of direct methanol fuel cell and preparation method and direct methanol fuel cell thereof
  • Membrane electrode complex of direct methanol fuel cell and preparation method and direct methanol fuel cell thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing the membrane electrode assembly of the above-mentioned direct methanol fuel cell, comprising the following steps:

[0045] Spraying an anode catalyst on the surface of the anode diffusion layer to obtain an anode; spraying a cathode catalyst on the surface of the cathode diffusion layer to obtain a cathode;

[0046] hot-compressing the anode and the anode proton exchange membrane to obtain an anode composite membrane layer; hot-pressing the cathode and the cathode proton exchange membrane to obtain a cathode composite membrane layer;

[0047] The anode composite membrane layer, the liquid electrolyte layer and the cathode composite membrane are fixed, the anode catalyst of the anode composite membrane layer is in contact with the liquid electrolyte, and the cathode catalyst of the cathode composite membrane layer is in contact with the liquid electrolyte layer to obtain a direct methanol fuel cell Membrane elect...

Embodiment 1

[0055] Both the anode proton exchange membrane and the cathode proton exchange membrane used in this example are Nafion 112 perfluorosulfonic acid proton exchange membranes purchased from DuPont, with a thickness of 50 μm;

[0056] Both the anode diffusion layer and the cathode diffusion layer are TGP-H-060 carbon paper purchased from Japan TORAY Company, with a thickness of 0.19mm;

[0057] Both the anode catalyst and the cathode catalyst were electrocatalysts purchased from Johnson Matthey, the cathode side catalyst was Hispec 1000Pt black, the anode side catalyst was Hispec 6000 PtRu black, and the loading capacity was 5 mg / cm 2 .

[0058] The specific operation is as follows:

[0059] 1. Spray the anode catalyst and cathode catalyst evenly on the surface of the anode diffusion layer and the cathode diffusion layer respectively. The thickness of the anode catalyst layer and the cathode catalyst layer are both 10 μm to obtain the anode and cathode with a size of 3cm×3cm.

...

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Abstract

The invention provides a membrane electrode complex of a direct methanol fuel cell and a preparation method and a direct methanol fuel cell thereof. The membrane electrode complex of a direct methanol fuel cell comprises an anode composite membrane layer, a liquid electrolyte layer and a cathode composite membrane layer which are orderly arranged; the anode composite membrane layer comprises an anode diffusion layer, an anode catalytic layer and an anode proton exchange membrane which are orderly arranged; the liquid electrolyte layer comprises: a porous material and liquid electrolyte adsorbed on the porous material; the cathode composite membrane layer comprises a cathode diffusion layer, a cathode catalytic layer and a cathode proton exchange membrane which are orderly arranged. The membrane electrode complex of a direct methanol fuel cell provided by the invention has a low methanol permeation rate and high proton conductivity, is applicable to a high methanol concentration, thus provides higher energy density for the methanol fuel cell, and increases the fuel utilization rate.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a membrane electrode composite of a direct methanol fuel cell, a preparation method thereof and a direct methanol fuel cell. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy into electrical energy through an electrochemical reaction. It was first proposed by Gove in 1839. Compared with traditional energy conversion systems, fuel cells have many advantages: first, they are not limited by the Carnot cycle, and the energy conversion efficiency is high; second, the product is usually water, which has little environmental pollution. The high-efficiency and non-polluting properties of fuel cells have attracted more and more attention in recent years. [0003] The fuel cells at this stage are mainly hydrogen-oxygen fuel cells, but due to the technical problems of hydrogen generation, storage, transportation and safety of this kind o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/10H01M8/1004
CPCY02E60/50
Inventor 邢巍蔡卫卫刘长鹏冯立纲梁亮李晨阳
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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