Fluorine-containing proton exchange membrane for fuel cell prepared by using functional fluororesin
A proton exchange membrane and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of difficulty in providing membrane dimensional stability and proton conductivity at the same time, and achieve the effect of improving mechanical properties
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Embodiment 1
[0034] Convert the repeating unit to
[0035]
[0036] Ion-exchange capacity is that the perfluorosulfonic acid resin of 1.1mmol / g is dissolved in ethylene glycol, forms the resin solution of 25wt%; And has the functional fluororesin of following (I) structural formula to be dissolved in ethanol, forms the 20wt% Functional fluororesin solution. Mix the two resin solutions uniformly at high speed to prepare a film-forming solution A, in which the content of perfluorosulfonic acid resin is 27 wt%.
[0037]
[0038] Among them, f=2; a=6, b=8, c=d=1; M=M'=Ce
[0039] The fluorine-containing proton exchange membrane of the present invention with a thickness of 30 micrometers was prepared by a solution cast membrane forming method at 190° C. for 30 minutes. The performance test experiment was carried out on the prepared electrolyte membrane, and its proton conductivity at 100°C was measured to be 59mS / cm; the tensile strength was 35MPa; the hydrogen permeation current was 0....
Embodiment 2
[0041] Convert the repeating unit to
[0042]
[0043]Ion exchange capacity is that the perfluorosulfonic acid resin of 1mmol / g is dissolved in the dimethyl sulfoxide, forms the perfluorosulfonic acid resin solution of 10wt%; With the functional fluororesin solution with (I) structural formula among the embodiment 1 In ethanol, form a 30% functional fluororesin solution, wherein f=2; a=8, b=7, c=d=1; M=M'=Mn. Mix the two resin solutions uniformly at high speed to prepare film-forming solution A, in which the content of perfluorosulfonic acid resin is 60 wt%. The fluorine-containing proton exchange membrane of the present invention with a thickness of 30 micrometers was prepared by a solution cast membrane forming method at 190° C. for 30 minutes. The performance test experiment was carried out on the prepared electrolyte membrane, and its proton conductivity at 100°C was measured to be 58mS / cm; the tensile strength was 38MPa; the hydrogen permeation current was 0.85mA / cm ...
Embodiment 3
[0045] Convert the repeating unit to
[0046]
[0047] Ion-exchange capacity is that the perfluorosulfonic acid resin of 0.9mmol / g is dissolved in methylformamide, forms the perfluorosulfonic acid resin solution of 15wt%; With the functional fluororesin solution of (I) structural formula among the embodiment 1 In propanol, form a 25% functional fluororesin solution, wherein f=3; a=10, b=8, c=d=1; M=M'=La. Mix the two resin solutions uniformly at high speed to prepare a film-forming solution A, in which the content of the perfluorosulfonic acid resin is 40 wt%. The fluorine-containing proton exchange membrane of the present invention with a thickness of 30 micrometers was prepared by a solution cast membrane forming method at 190° C. for 30 minutes. The performance test experiment was carried out on the prepared electrolyte membrane, and its proton conductivity at 100°C was measured to be 58mS / cm; the tensile strength was 40MPa; the hydrogen permeation current was 0.81mA / cm...
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Abstract
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