초록 ▼

A fuel cell, having improved sealing against leakage, includes a fuel cell component having a cured sealant, wherein the cured sealant includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator. The fuel cell component may be a cat

A fuel cell, having improved sealing against leakage, includes a fuel cell component having a cured sealant, wherein the cured sealant includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator. The fuel cell component may be a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. A method for forming such a fuel cell includes the steps of providing a fuel cell component including a substrate; providing a mold having a cavity; positioning the mold so that the cavity is in fluid communication with the substrate; applying a curable liquid sealant composition into the cavity, wherein the curable sealant composition includes a telechelic-functional polyisobutylene, an organhydrogenosilane crosslinker, a platinum catalyst and a photoinitiator; and curing the composition with actinic radiation.

대표청구항 ▼

1. A method for forming a fuel cell including: providing a fuel cell component including a substrate;providing a mold having a cavity;positioning the mold so that the cavity is in fluid communication with the substrate;applying a curable liquid sealant composition into the cavity, wherein the curabl

1. A method for forming a fuel cell including: providing a fuel cell component including a substrate;providing a mold having a cavity;positioning the mold so that the cavity is in fluid communication with the substrate;applying a curable liquid sealant composition into the cavity, wherein the curable sealant composition comprises a (meth)acryloyl terminated material and a photoinitiator; andcuring the composition with actinic radiation. 2. The method of claim 1, wherein the composition further comprises a (meth)acryloyl-terminated compound having at least two (meth)acryloyl pendant groups selected from the group consisting of (meth)acryloyl-terminated polyether, a (meth)acryloyl-terminated polyolefin, (meth)acryloyl-terminated polyurethane, a (meth)acryloyl-terminated polyester, a (meth)acryloyl-terminated silicone, copolymers thereof; a monofunctional (meth)acrylate; and combinations thereof. 3. The method of claim 1, wherein the fuel cell component is selected from the group consisting of a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. 4. The method of claim 1, wherein the mold is transmissive to actinic radiation. 5. A method for forming a fuel cell including: providing a fuel cell component including a substrate;providing a mold having a cavity;positioning the mold so that the cavity is in fluid communication with the substrate;applying a curable liquid sealant composition into the cavity, wherein the curable sealant composition comprises actinic radiation curable material selected from the group consisting of a (meth)acryloyl terminated material having at least two (meth)acryloyl pendant groups, (meth)acryloyl-terminated urethane, (meth)acryloyl-terminated polyether, (meth)acryloyl-terminated polyolefin, (meth)acryloyl-terminated polyester, copolymers thereof and combinations thereof; andcuring the composition with actinic radiation. 6. The method of claim 5, wherein the curable composition further comprises a monofunctional (meth)acrylate having the general structure CH2═C(R)COOR2 where R is H, CH3, C2H5 or halogen, and R2 is C1-8 mono- or bicycloalkyl, a 3 to 8-membered heterocyclic radial with a maximum of two oxygen atoms in the heterocycle, H, alkyl, hydroxyalkyl or aminoalkyl where the alkyl portion is C1-8 straight or branched carbon atom chain. 7. The method of claim 5, wherein the fuel cell component is selected from the group consisting of a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. 8. A method for forming a fuel cell including: providing a first fuel cell component including a substrate and a second fuel cell component including a substrate;providing an actinic radiation curable liquid sealant comprising a (meth)acryloyl terminated materialapplying the sealant to the substrate of the first fuel cell component;juxtapositingly aligning the substrates of the first and second fuel cell components; andcuring the sealant with actinic radiation. 9. The method of claim 8, wherein the curable sealant further comprises a (meth)acryloyl-terminated compound having at least two (meth)acryloyl pendant groups selected from the group consisting of (meth)acryloyl-terminated polyether, a (meth)acryloyl-terminated polyolefin, (meth)acryloyl-terminated polyurethane, a (meth)acryloyl-terminated polyester, a (meth)acryloyl-terminated silicone, copolymers thereof; a monofunctional (meth)acrylate; and combinations thereof. 10. The method of claim 8, wherein the first or second fuel cell component is selected from the group consisting of a cathode flow field plate, an anode flow field plate, a resin frame, a gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, a membrane electrolyte, a membrane-electrode-assembly frame, and combinations thereof. 11. The method of claim 8, wherein the step of applying the sealant includes: providing a mold having a cavity; andpositioning the mold so that the cavity is in fluid communication with the substrate of the first fuel cell component.