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Proton exchange membrane of direct alcohol fuel cell and method for preparing membrane electrode

A fuel cell and alcohol barrier membrane technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve the problems of poor electrode performance, weak bonding between alcohol barrier membrane and electrolyte membrane, peeling, etc., so as to improve electrode performance. , The effect of preventing fuel permeation and methanol permeation

Inactive Publication Date: 2006-02-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of the alcohol barrier film and the electrolyte film is weak, and it is easy to peel off after long-term operation, and the performance of the electrode is poor under low temperature conditions

Method used

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  • Proton exchange membrane of direct alcohol fuel cell and method for preparing membrane electrode
  • Proton exchange membrane of direct alcohol fuel cell and method for preparing membrane electrode
  • Proton exchange membrane of direct alcohol fuel cell and method for preparing membrane electrode

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Experimental program
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Effect test

preparation example Construction

[0048] 2. Preparation of the alcohol barrier film: take the treated Nafion film and plate a palladium (Pd) film with a thickness of 0.05-50 on its surface by means of electroless plating.

[0049] 3. Treatment of Pd / Nafion composite membrane: use 0.5M H for the Pd / Nafion composite membrane 2 SO 4 The solution is treated at a temperature of 40-100° C. for 2-12 hours, and then treated with deionized water for 2-12 hours (twice). Treat with 0.5M NaOH for 2 to 12 hours, and then treat with deionized water for 2 to 12 hours (twice).

[0050] 4. Catalyst layer preparation: The cathode and anode catalyst layers are respectively covered on both sides of the Pd / Nafion composite membrane by direct spraying or pressure transfer method. The position of the alcohol barrier palladium (Pd) membrane can be placed on the cathode side or the anode side according to specific requirements, or pressed between two Nafion electrolyte membranes

[0051] 5. Activation of the multilayer film electro...

Embodiment 1

[0053] Configure 1N PdCl 2 solution, 10 mL of 1N HCl solution was added. The processed 4×4cm 2 The Nafion 115 membrane was soaked in the prepared solution, kept at 30°C for 5 minutes, taken out and rinsed with deionized water, then placed in 1N hydrazine solution for 6 minutes, and repeated 5 times to treat the membrane. Immerse the activated and sensitized Nafion 115 membrane into the plating solution, the composition of the plating solution is: PdCl 2 6g / L, EDTA 67g / L, NH 3 ·H 2 O 350mL / L, N 2 NNH 2 , 0.5ml / L, surfactant: 1% volume, + sodium ethanesulfonate. The plating solution was stirred with a magnetic stirring bar, and a Pd film was chemically deposited on one side of the Nafion 115 film under the condition of 30°C, and the thickness of the Pd film was about 5 μm. The Pt / Ru black and Pt black catalysts were directly sprayed on both sides of the Pd / Nafion 115 membrane respectively. 2 , Nafion content is 15wt.%. The cathode catalyst is a Pt black catalyst with a...

Embodiment 2

[0056] Electrodes were prepared according to the steps in Example 1. The anode catalyst is Pt / Ru black, and the catalyst loading is 3.7mg / cm 2 , Nafion content is 15%. The cathode catalyst is Pt black, and the catalyst loading is 3.0mg / cm 2 , Nafion content is 5%. After activation, measure the performance of the single cell. The experimental conditions are as follows: the anode feed is 1M methanol aqueous solution at 1ml / min, the cathode feed is oxygen, the flow rate is 4.0ml / s, and the operating temperature is 30°C. Battery performance curve see image 3 .

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Abstract

The invention an alcohol-proof film and a film electrode, which can be directed, used in alcohol fuel battery and their preparing method, relating to the technique of fuel battery. Said alcohol-proof film is palladium film or palladium-base alloy film whose thickness of film is 0.05-50 micrometer, and the palladium amount of film is 70-100%. The structure of film electrode formed by alcohol-proof film is multi-layer, comprises anode diffuse layer, cathode diffuse layer, anode catalytic layer, cathode catalytic, electrolytic film and the alcohol-proof film, while the alcohol-proof film is arranged on the side of anode or the cathode, or be arranged between two Nafion electrolytic films. Said prepared film electrode has better property when charge-in at low temperature and high concentration, so it has much ascendant in the application for the self-contained portable breathing power at the indoor temperature. The electrode also can be used in sensor device and electrochemical device.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to the preparation of an alcohol barrier membrane and a membrane electrode for direct alcohol fuel cells. Background technique [0002] The invention relates to a membrane electrode structure for a proton exchange membrane fuel cell and its preparation technology. In recent years, with the rapid development of multi-functional portable electronic products, the battery consumption has increased sharply. At present, the power density of various primary or secondary batteries commercialized is low, and the volume and weight of batteries need to be greatly increased to meet the power consumption of electronic products. need. Moreover, the primary or secondary battery has the problem of environmental pollution. Direct methanol fuel cell is a type of power generation device that directly uses methanol as fuel to convert chemical energy into electrical energy. Due to the rich source ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M4/86H01M4/88H01M8/10H01M8/1004
CPCY02E60/522Y02E60/50
Inventor 孙公权孙海王素力刘建国汪国雄樊小颖赵新生徐恒泳侯守福辛勤
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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