Method of forming a fuel cell stack
First Claim
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1. A method of making a cylindrical fuel cell stack comprising:
- forming an anode electrode layer comprising an anode electrode portion and a non-electrode portion;
forming an anode double sided adhesive layer having a non-adhesive gas diffusion layer therein, said double sided adhesive layer adhered on one side to the anode electrode layer such that a portion of the anode electrode is in contact with the anode gas diffusion layer;
forming an ion exchange membrane layer having an ion exchange membrane in an opening therein, said ion exchange membrane aligned with the non-adhesive anode gas diffusion layer in the opening in the anode double sided adhesive layer, said ion exchange membrane layer adhered on a first side to the side of the double sided adhesive layer opposite the anode electrode layer;
forming a cathode double sided adhesive layer having a non-adhesive cathode gas diffusion layer in an opening therein, said cathode has diffusion layer aligned with the ion exchange membrane, said double sided adhesive layer adhered on one side to a second side of the ion exchange membrane;
forming a cathode electrode layer comprising a cathode electrode portion and a non-electrode portion adhered to the cathode double sided adhesive layer and having a non-adhesive cathode gas diffusion layer in an opening therein, on the side opposite the ion exchange membrane;
pressing the formed layers together as parallel adjacent planes rolled to form a flexible fuel cell stack, the parallel adjacent planes sufficiently flexible to be conformed into a cylindrical shape;
conforming the flexible fuel cell stack to a cylindrical shape to form a cylindrical fuel cell stack; and
adhering the cylindrical fuel cell stack around a rigid cylindrical anode support.
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Abstract
A method of forming a fuel cell stack, wherein the stack includes an anode electrode layer, an adhesive and anode gas diffusion layer coupled to the anode electrode layer, an ion exchange membrane coupled on a first side to the gas diffusion layer opposite the anode electrode layer, an adhesive and cathode gas diffusion layer coupled to a second side of the ion exchange membrane, and a cathode electrode layer coupled to the adhesive and cathode gas diffusion layer opposite the ion exchange membrane. The fuel cell stack may be flexible.
46 Citations
9 Claims
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1. A method of making a cylindrical fuel cell stack comprising:
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forming an anode electrode layer comprising an anode electrode portion and a non-electrode portion; forming an anode double sided adhesive layer having a non-adhesive gas diffusion layer therein, said double sided adhesive layer adhered on one side to the anode electrode layer such that a portion of the anode electrode is in contact with the anode gas diffusion layer; forming an ion exchange membrane layer having an ion exchange membrane in an opening therein, said ion exchange membrane aligned with the non-adhesive anode gas diffusion layer in the opening in the anode double sided adhesive layer, said ion exchange membrane layer adhered on a first side to the side of the double sided adhesive layer opposite the anode electrode layer; forming a cathode double sided adhesive layer having a non-adhesive cathode gas diffusion layer in an opening therein, said cathode has diffusion layer aligned with the ion exchange membrane, said double sided adhesive layer adhered on one side to a second side of the ion exchange membrane; forming a cathode electrode layer comprising a cathode electrode portion and a non-electrode portion adhered to the cathode double sided adhesive layer and having a non-adhesive cathode gas diffusion layer in an opening therein, on the side opposite the ion exchange membrane; pressing the formed layers together as parallel adjacent planes rolled to form a flexible fuel cell stack, the parallel adjacent planes sufficiently flexible to be conformed into a cylindrical shape; conforming the flexible fuel cell stack to a cylindrical shape to form a cylindrical fuel cell stack; and adhering the cylindrical fuel cell stack around a rigid cylindrical anode support. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification