Preparation method of Nafion/mesoporous silicon dioxide composite proton exchange film
A technology of mesoporous silica and proton exchange membrane, which is applied in the fields of final product manufacturing, electrochemical generator, sustainable manufacturing/processing, etc., and can solve problems such as poor modification effect, low proton conductivity, and high methanol permeation , to achieve the effects of easy scale-up preparation, simple and easy method, and mild reaction conditions
Active Publication Date: 2008-12-10
中科应化(长春)科技有限公司
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Abstract
The invention provides a method for production of Nafion/mesoporous silicon dioxide composite proton exchange film. By using the method of dip-coating in situ, silica sol comprising a surfactant is coated on the surface of Nafion film by pulling to obtain the Nafion/mesoporous silicon dioxide composite proton exchange film. Alcohol-resisting performance of a hybridized film and the proton conducting performance are controlled by varying type and concentration of the surfactant, speed rate and times of the dip-coating pulling, and the interval time among several dip-coating pulling. The surface of the obtain composite film includes a nanometer network structure of the mesoporous silicon dioxide, which can efficiently block methanol from penetration, meanwhile, on account of hydrophilic property of the mesoporous silicon dioxide, the proton conducting rate of the composite film still remains as equivalent as that of the Nafion film or even higher than that of the Nafion film. The above characteristics endow the composite film with a quite extensive prospect in applying to direct methanol fuel battery.
Application Domain
Final product manufactureCell component details +1
Technology Topic
ChemistryElectrical resistivity and conductivity +12
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