Alcohol-rejection proton conducting composite film and preparation method thereof

A proton-conducting membrane and proton-conducting technology, applied in chemical instruments and methods, circuits, fuel cells, etc., can solve the problems of large resistance, complicated methods, high cost, etc., and achieve the effect of small resistance and improved alcohol resistance performance

Inactive Publication Date: 2013-10-23
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the currently known polymer proton conducting membranes with thin film interlayers, the polymer proton conducting membranes using palladium foil as interlayers have the best effect on preventing fuel penetration, but in this case the resistance of protons passing through the palladiu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Commercial Nafion perfluorosulfonic acid polymer solution evaporates to dryness, weigh 0.8g perfluorosulfonic acid polymer, and then dissolve it with 7.2g dimethylformamide to make a 10wt% Nafion / dimethylformamide membrane Solution

[0043] (2) Take a piece of 4cm*4cm copper-based chemical vapor deposition graphene, flatten it with the graphene layer side facing upwards, drop the membrane solution on the surface, and volatilize the solvent for 12h at 60℃ to form a polymer proton conductivity membrane;

[0044] (3) The copper-based chemical vapor deposition graphene layer cast with Nafion film obtained in step (2) is in the concentration of 0.1M Fe 3+ Soak in the solution for 14 days, after the copper base is completely etched away, wash with deionized water and dry to obtain the alcohol-blocking proton conductive composite film with the graphene layer attached to the side of the Nafion membrane;

[0045] (4) Add 10wt% Nafion / dimethylformamide membrane solution dropwise to...

Embodiment 2

[0050] (1) Commercial Nafion perfluorosulfonic acid polymer solution evaporates to dryness, weigh 0.8g perfluorosulfonic acid polymer, and then dissolve it with 15.2g dimethylacetamide to make 5wt% Nafion / dimethylacetamide membrane Solution

[0051] (2) Take a piece of 4cm*4cm copper-based chemical vapor deposition graphene, flatten it with the graphene layer side up, and drop the membrane solution on the surface, and volatilize the solvent at 100℃ for 10h to form a polymer proton conductivity membrane;

[0052] (3) The copper-based chemical vapor deposition graphene layer cast with Nafion film obtained in step (2) is placed in Fe with a concentration of 1.5M 3+ Soak in the solution for 7 days, after the copper base is completely etched away, wash with deionized water, and dry to obtain the alcohol-blocking proton conductive composite membrane with the graphene layer attached to the side of the Nafion membrane;

[0053] (4) Add 5wt% Nafion / dimethylacetamide membrane solution dropwis...

Embodiment 3

[0058] (1) The commercial Nafion perfluorosulfonic acid polymer solution evaporates to dryness, weigh 0.8g perfluorosulfonic acid polymer, and then dissolve it with 9.87g dimethyl sulfoxide to make 7.5wt% Nafion / dimethyl sulfoxide Membrane solution

[0059] (2) Take a piece of 4cm*4cm copper-based chemical vapor deposition graphene, flatten it with the graphene layer side facing upwards, drop the membrane solution on the surface, and volatilize the solvent for 8 hours at 120℃ to form a polymer proton conductivity membrane;

[0060] (3) Put the copper-based chemical vapor deposition graphene layer cast with Nafion film obtained in step (2) in a concentration of 2.5M Fe 3+ Soak in the solution for 1 day, after the copper base is completely etched away, wash with deionized water and dry to obtain the alcohol-blocking proton conductive composite film with the graphene layer attached to the side of the Nafion membrane;

[0061] (4) Drop the 7.5wt% Nafion / dimethyl sulfoxide membrane solut...

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PUM

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Abstract

The invention discloses an alcohol-rejection proton conducting composite film and a preparation method thereof. The alcohol-rejection proton conductive composite film is characterized in that a grapheme layer is composited in parallel with polymer proton conducting films and is adhered to one sides of the polymer proton conducting films or clamped between the two polymer proton conducting films. The preparation method comprises the following steps of: attaching the grapheme layer to one sides of the polymer proton conducting films by developing copper-base chemical vapor deposition grapheme or rotatably spraying grapheme aqueous dispersion/oxidized grapheme water solution, and further clamping the grapheme layer between the two polymer proton conducting films by utilizing a hot-pressing process. According to the alcohol-rejection proton conducting composite film, the alcohol-rejection performance of the film can be remarkably improved on the premise that the electric conductivity of protons of a polymer proton conducting film body is not influenced; the alcohol-rejection proton conducting composite film can be obtained by utilizing diversified methods; the preparation process is simple, and most areas of the grapheme layer are single-layered, so that the resistance caused to the proton conduction in the film body is relatively low.

Description

Technical field [0001] The invention relates to the technical field of ion-conducting polymer membranes, in particular to a composite proton-conducting membrane in which a graphene layer (Graphene, G) is combined with a polymer electrolyte and a preparation method thereof. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of a substance into electrical energy. Compared with internal combustion engines, fuel cells are not restricted by the Carnot cycle, so the efficiency of material chemical energy utilization can reach a very high level. Compared with the battery, the fuel cell is a device for energy conversion rather than energy storage. As long as the fuel is continuously replenished, it can continue to generate electricity, which has the advantage of not requiring charging. In addition, fuel cells also have the characteristics of high energy density and high power density, and they produce less pollution than int...

Claims

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Application Information

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IPC IPC(8): H01M8/02B32B27/00H01M8/1053
CPCY02E60/50
Inventor 王宇新刘征安德
Owner TIANJIN UNIV
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