strengthened electrolyte membrane
An electrolyte membrane and proton conduction technology, applied in electrolytes, solid electrolytes, non-aqueous electrolytes, etc., can solve the problems of fuel cells not using combustion
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[0083] Item 1: An electrolyte membrane comprising:
[0084] The first proton-conducting polymer reinforced with nanofibrous mats;
[0085] wherein said nanofibrous mat is made of nanofibers comprising a fibrous material selected from polymers and polymer blends;
[0086] wherein said fibrous material has fibrous material proton conductivity;
[0087] wherein the first proton conducting polymer has a first proton conducting polymer conductivity; and
[0088] Wherein the proton conductivity of the fiber material is lower than that of the first proton conductive polymer.
[0089] Item 2: The electrolyte membrane of Item 1, wherein the fibrous material is selected from the group consisting of highly fluorinated polymers, perfluorinated polymers, hydrocarbon polymers, blends and combinations thereof.
[0090] Item 3: The electrolyte membrane according to item 1, wherein the fibrous material comprises a polymer suitable for electrospinning selected from the group consisting of PV...
example
[0127] testing method
[0128] The diameter of the nanofibers was determined by field emission scanning electron microscopy (FE-SEM) using a Jeol JSM-6701F scanning electron microscope (3-5 kV, magnification 5,000-10,000 times). The average fiber diameter values in Table 1 are calculated based on a sample of 100 fibers.
[0129] The basis weight of the nanofiber mat was determined by cutting a 10 cm x 10 cm nanofiber mat and weighing it on a balance. The average basis weight values in Table 1 are calculated based on 5-6 sheet samples.
[0130] The porosity of the nanofiber mat is estimated semi-empirically according to the following formula, using a sample that has been folded in half and extruded extremely small to reduce measurement errors, cutting out a section of known area, measuring the thickness and weight of the section, and using the material intrinsic density.
[0131] Porosity (%)=(1-(weight / (intrinsic density×area×thickness)))×100
[0132] The thickness o...
example 1
[0150] working example 1 : Electrolyte membrane reinforced with PVDF nanofiber mat.
[0151] A sample of 825EW perfluorosulfonic acid ionomer of the type described in Published U.S. Patent Application No. 2006 / 0014887 was dissolved at about 20% by weight solids in a mixture of n-propanol / water (50 / 50 by weight) in the mixture. The ionomer solution was coated at a constant flow rate onto a polyester (PET) liner with a target dry thickness of 8 microns using a coating die and a line speed of about 2 meters per minute, using Hirano, Nara, Japan. A pilot coater manufactured by Hirano Entec Ltd. (Nara, Japan), which has four sequentially arranged in the longitudinal direction of the fiber web and set at 50°C, 100°C, 120°C and 145°C drying area. Immediately after the ionomer solution was coated onto the polyester liner and before it entered the first drying zone, a small piece (20 cm x 20 cm) of PVDF nanofiber mat of PE-1 was laid by hand on the coating solution, and then Pass ...
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