The invention discloses preparation methods of an
antioxidant, a water-retaining agent, a mixture and a modified fuel
cell membrane
electrode. The invention discloses a preparation method of the modified fuel
cell membrane
electrode, which comprises the following steps: a) preparing an
antioxidant, or a water-retaining agent, or a mixture with
antioxidant and water-retaining functions, and preserving the
mixed solution for later use; b)
coating two sides of a microporous reinforced membrane with the
mixed solution obtained in the step a) by using a
coating device, and
drying the membrane to obtain a modified
perfluorosulfonic acid proton exchange membrane; c)
processing the modified PEM membrane to prepare the fuel
cell membrane
electrode. The invention further discloses a formula and a preparation method of the antioxidant, a formula and a preparation method of the water-retaining agent, a formula and a preparation method of the mixture with antioxidant and water-retaining functions, and applications of all the products hereinabove in the fields of membrane electrodes and
fuel cells. According to the invention, the
chemical structure degradation phenomenon of the
proton exchange membrane caused by free radicals is effectively relieved, the lasting
water retention performance of the
proton exchange membrane is improved, the proton
conductivity is improved, and the
mechanical property of the membrane electrode is improved by adopting the enhanced microporous membrane, so that the stability of the membrane electrode is enhanced, and the service life of the membrane electrode is prolonged.