Sulfonation phenylphosphonic acid zirconium doping proton exchanging film and method of producing the same

Abstract

The invention relates to a proton exchange membrane adulterated with sulfonation zirconium phenylphosphonate which is characterized in that: the film-making material thereof consists of a sulfonation high molecular material and sulfonation zirconium phenylphosphonate; wherein, the sulfonation degree choice of the sulfonation high molecular material is 20 percent to 85 percent which accounts for 60 percent to 95 percent of the mass percent of the film-making material; and the sulfonation degree choice of the sulfonation zirconium phenylphosphonate is 30 percent to 90 percent which accounts for 5 percent to 40 percent of the mass percent of the film-making material. Besides, a porous supporting material can be added to the film so as to improve the strength of the film and reduce the deformability thereof. The film-making material fills the holes of the porous supporting material and forms a layer of thin film on the outer surface of the porous supporting material. The proton exchange membrane is applicable to intermediate temperature direct methanol fuel cells so as to improve the application temperature of the proton exchange membrane and the property of the fuel cells.

Description

technical field [0001] The invention relates to a proton exchange membrane doped with zirconium sulfonated phenylphosphonate and a preparation method thereof. Background technique [0002] The proton exchange membrane is the core component of the proton exchange fuel cell (PEMFC), which plays a dual role in the fuel cell. On the one hand, it acts as an electrolyte for proton transfer; on the other hand, it acts as a material for separating the two poles of the separator material. At present, proton exchange membrane fuel cells mainly use the perfluorosulfonic acid membrane Nafion membrane of DuPont Company of the United States. This type of membrane has excellent performance, but when the temperature is higher than 90°C, the conductivity of the membrane will drop significantly due to water loss. In addition, due to the high permeability of Nafion membrane to methanol, the cathode generates a mixed potential, causing the performance of the cathode to attenuate, which will g...

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Problems solved by technology

In order to reduce the swelling degree of SPPESK film and improve its alcohol resistance, Su Y.H. et al [J.PowerSources, 2006, 155(2): 111-117] prepared SPPEK / SiO 2 Composite film, nano-SiO 2 The particles are evenly distributed on the polymer matrix, which improves the swelling behavior, improves the thermal stability and mechanical properties, and the methanol penetration is improved to a certain extent, but the proton conductivity is reduced to a certain extent

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