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US 8,026,016 B2Granted
Polymer electrolyte membrane and fuel cell employing the same
AssigneeSamsung SDI Co., Ltd.
InventorsMyung-dong Cho, Hee-young Sun, Myung-jin Lee
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Abstract
The present invention relates to a polymer electrolyte membrane that includes a porous polymer matrix and an ion conducting polymer coating membrane formed in the outer surface of single fibers in the porous polymer matrix. The polymer electrolyte membrane can provide excellent mechanical strength, is not deteriorated by heat even at a temperature higher than 100°C., can provide excellent ion conductivity even at non-humidified state. Thus it is suitable for use in a fuel cell that is operated at high temperatures.
Claims20
A polymer electrolyte membrane, comprising:
- a porous polymer matrix;
- and
- a polymer coating that conducts ions, the polymer coating formed on the outer face of a single fiber in the porous polymer matrix,
- wherein the polymer coating is obtained by polymerizing an ion conducting polymeric compound using a crosslinking agent, wherein the polymer electrolyte membrane is obtained by vacuum deposition of a micro particle coating of the ion conducting polymer on individual fibers of a porous polymer matrix to obtain a polymer electrolyte wherein the membrane sterically surrounds the circumference of the individual fibers in the polymer matrix,
- wherein pores of the polymer electrolyte membrane are present after coating,
- wherein the ion conducting polymeric compound is a sulfonyl acrylate, a monomer, or an oligomer, and
- wherein the monomer and the oligomer comprise at least one functional group selected from a group consisting of an imide group, a sulfonimide group, a sulfonamide group, and a hydroxyl group at its terminal end.
4 more elements
A fuel cell, comprising:
- a cathode;
- an anode;
- and
- a polymer electrolyte membrane,
- wherein the polymer electrolyte membrane comprises a porous polymer matrix and a polymer coating that conducts ions, the polymer coating formed in the outer face of a single fiber in the porous polymer matrix,
- wherein the polymer coating is obtained by polymerizing an ion conducting polymeric compound using a crosslinking agent,
- wherein the polymer electrolyte membrane is obtained by vacuum deposition of a micro particle coating of the ion conducting polymer on individual fibers of a porous polymer matrix to obtain a polymer electrolyte wherein the membrane sterically surrounds the circumference of the individual fibers in the polymer matrix,
- wherein pores of the polymer electrolyte membrane are present after coating,
- wherein the ion conducting polymeric compound is a sulfonyl acrylate, a monomer, or an oligomer, and
- wherein the monomer and the oligomer comprise at least one functional group selected from a group consisting of an imide group, a sulfonimide group, a sulfonamide group, and a hydroxyl group at its terminal end.
7 more elements
A polymer electrolyte membrane, comprising:
- a porous polymer matrix;
- and
- a polymer coating that conducts ions, the polymer coating formed on the outer face of a single fiber in the porous polymer matrix, wherein the polymer coating is obtained by polymerizing an ion conducting polymeric compound using a crosslinking agent, wherein the pores of the polymer electrolyte membrane are present after coating,
- wherein the polymer coating is coated on a fiber of the porous polymer matrix from about 1 μm to about 3 μm thick,
- wherein the ion conducting polymeric compound is a sulfonyl acrylate, a monomer, or an oligomer, and
- wherein the monomer and the oligomer comprise at least one functional group selected from a group consisting of an imide group, a sulfonimide group, a sulfonamide group, and a hydroxyl group at its terminal end.
3 more elements
A fuel cell, comprising:
- a cathode;
- an anode;
- and
- a polymer electrolyte membrane,
- wherein the polymer electrolyte membrane comprises a porous polymer matrix and a polymer coating that conducts ions, the polymer coating formed in the outer face of a single fiber in the porous polymer matrix, wherein the polymer coating is obtained by polymerizing an ion conducting polymeric compound using a crosslinking agent, wherein the pores of the polymer electrolyte membrane are present after coating,
- wherein the polymer coating is coated on a fiber of the porous polymer matrix from about 1 μm to about 3 μm thick,
- wherein the ion conducting polymeric compound is a sulfonyl acrylate, a monomer, or an oliqomer, and
- wherein the monomer and the oligomer comprise at least one functional group selected from a group consisting of an imide group, a sulfonimide group, a sulfonamide group, and a hydroxyl group at its terminal end.
5 more elements
Dependencies are inferred from the claim text.