Double catalyst layer membrane electrode of direct methanol fuel cell and preparation method thereof

A methanol fuel cell, double catalytic layer technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of improving operation stability and strong bonding ability

Inactive Publication Date: 2012-03-21
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a double catalyst layer membrane electrode preparation technology in order to solve the existing problem of stripping between the catalytic layer and the proton exchange membrane during the operation of the membrane electrode in the existing direct methanol fuel cell membrane electrode preparation technology. The double catalytic layer refers to the catalytic layer and the "catalytic glue" layer, thereby improving the working stability of DMFC

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  • Double catalyst layer membrane electrode of direct methanol fuel cell and preparation method thereof

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example 1

[0020] A double-catalyzed membrane electrode for a direct methanol fuel cell, comprising a cathode diffusion layer, an anode diffusion layer, a cathode catalyst layer, an anode catalyst layer, a proton exchange membrane, a cathode "catalytic glue" layer and an anode "catalytic glue" layer, wherein the proton One side of the exchange membrane is the cathode "catalytic glue" layer, the cathode catalytic layer and the cathode diffusion layer in turn, and the other side is the anode "catalytic glue" layer, the anode catalytic layer and the anode diffusion layer in turn. The anode "catalytic glue" layer contains 60 %wt% Nafion and 40wt% catalyst, the cathode "catalytic glue" layer contains 70%wt% Nafion and 30wt% catalyst. The anode catalyst layer contains 10wt% Nafion and 90wt% catalyst, the cathode catalyst layer contains 30wt% Nafion and 70wt% catalyst, the catalyst used in the anode catalyst layer and the anode "catalytic glue" layer is a PtRu black catalyst, The catalyst used ...

Embodiment 2

[0032] The direct methanol fuel cell double-catalyzed membrane electrode includes a cathode diffusion layer, an anode diffusion layer, a cathode catalyst layer, an anode catalyst layer, a proton exchange membrane, a cathode "catalytic glue" layer and an anode "catalytic glue" layer, wherein the proton exchange membrane One side is the cathode "catalytic glue" layer, the cathode catalytic layer and the cathode diffusion layer in turn, and the other side is the anode "catalytic glue" layer, the anode catalytic layer and the anode diffusion layer in turn, and the anode "catalytic glue" layer contains 70%wt% Nafion and 30wt% catalyst, the cathode "catalytic glue" layer contains 80%wt% Nafion and 20wt% catalyst. The anode catalyst layer contains 15wt% Nafion and 85wt% catalyst, the cathode catalyst layer contains 35wt% Nafion and 65wt% catalyst, the catalyst used in the anode catalyst layer and the anode "catalytic glue" layer is a PtRu black catalyst, The catalyst used in the cath...

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Abstract

The invention discloses a double catalyst layer membrane electrode of direct methanol fuel cell and a preparation method thereof, which belong to the field of fuel cell preparation. The preparation method for double catalyst layer aims to improve working stability of the direct methanol fuel cell. The preparation method comprises the following steps of: firstly, preparing a ''catalytic glue'' layer at the both sides of a proton exchange respectively; next, preparing an anodic catalyst layer and a cathodic catalyst layer on the surface of the ''catalytic glue'' layer, hotly pressing to prepare CCM (Catalyst Coating Membrane), and hotly pressing the CCM (Catalyst Coating Membrane) and a diffusion layer to prepare membrane electrode for direct methanol fuel cell. The preparation technology for double catalyst layer membrane electrode is suitable for direct methanol fuel cell and can remarkably improve running stability of the cell.

Description

technical field [0001] The invention belongs to the field of fuel cell preparation, and in particular relates to a double-catalyzed membrane electrode of a direct methanol fuel cell and a preparation method thereof. technical background [0002] With the depletion of traditional fossil energy, energy issues have become a hot topic in the world today, and fuel cells, as a power generation device different from traditional storage batteries, have become an important way to solve energy problems. Direct Methanol Fuel Cell (DMFC) is considered to be an ideal mobile power source because it uses liquid fuel and has a low operating temperature, and it has great development prospects. [0003] Membrane electrode is the core component of DMFC, which is composed of cathode and anode diffusion layer, cathode and anode catalyst layer and proton exchange membrane. The preparation methods of traditional membrane electrodes can be divided into two categories, one is the GDE method, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 王树博谢晓峰王金海王要武尚玉明
Owner TSINGHUA UNIV
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