Proton exchange composite membranes, composite solutions, and method for manufacturing and fuel cell using the same
AssigneeKorea Institute of Science and Technology
InventorsJongok Won, Yong Soo Kang, In-Hwan Oh, Heung Yong Ha, Sangwook Choi, Jee Won Choun, Bum-Suk Jung
Life of this patent
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Abstract
An ion exchange composition membrane is made up of dispersed natural clay and/or organized clay in ion conducting polymeric film as a methanol barrier material. The membrane exhibits low methanol crossover, high proton conductivity and is thus suitable for use in direct methanol fuel cells with low costal advantage.
Claims16
An ion exchange membrane comprising clays dispersed in ion-conducting polymeric film, said clays including a modified organic clay organized by at least one agent selected from the group consisting of CH3NH3+Cl−, CH3(CH2)2NH2, CH3(CH2)3NH2, CH3(CH2)7NH2, CH3(CH2)9NH2, CH3(CH2)11NH2, CH3(CH2)15NH2, CH3 (CH2)17NH2, HOOC(CH2)5NH2, HOOC(CH2)11NH2, (CH3)4N+Cl−, CH3(CH2)17NH(CH3), CH3(CH2)17N+(CH3)Br−, CH3(CH2)11N+(CH3)Br−, (CH3(CH2)17N+(CH3)Br−, CH3(CH2)17N+(C6H5) CH2(CH3)2Br−, CH3(CH2)17N+(HOCH2CH2)CH3Cl−, CH3(CH2)14CH2(C5H5N+)Br−, H2N(CH2)6NH2 and H2N(CH2)12NH2 as a barrier material.
A method of preparing an ion exchange membrane comprising dispersed clay in ion-conducting polymeric film as a barrier material, said method comprising steps of:
- (a) soaking so as to swell a prepared film membrane into a solvent;
- (b) soaking the swelled film membrane into a suspension containing said clay, said clay is selected from the group consisting of natural clay and/or organic clay;
- and
- (c) soaking the swelled membrane into an ion conducting polymeric solution, to form a self assembly membrane.
A method of preparing an ion exchange membrane comprising dispersed clay in ion-conducting polymeric film as a barrier material, said method comprising steps of:
- (a) dispersing said clay to an ion conducting polymeric solution to form a composite solution, said clay including a modified organic clay organized by at least one agent selected from the group consisting of CH3NH3+Cl−, CH3(CH2)2NH2, CH3(CH2)3NH2, CH3(CH2)7NH2, CH3(CH2)9NH2, CH3(CH2)11NH2, CH3(CH2)15NH2, CH3(CH2)17NH2, HOOC(CH2)5NH2, HOOC(CH2)11NH2, (CH3)4N+Cl−, CH3(CH2)17NH(CH3), CH3(CH2)17N+(CH3)Br−, CH3(CH2)11N+(CH3)Br−, (CH3(CH2)17)2N+(CH3)Br−, CH3(CH2)17N+(C6H5)CH2(CH3)2Br−, CH3(CH217N+(HOCH2CH2)CH3Cl−, CH3(CH2)14CH2(C5H5N+)Br−, H2N(CH2)6NH2 and H2N(CH2)12NH2;
- and
- (b) casting the composite solution to form the ion conducting polymeric film followed by drying over the solvent.
A method of preparing an ion exchange membrane comprising dispersed clay in ion-conducting polymeric film as a barrier material, said method comprising steps of:
- (a) dispersing clay to an ion conducting solution, to form a composite solution, said clay including a modified organic clay organized by at least one agent selected from the group consisting of CH3NH3+Cl−, CH3(CH2)2NH2, CH3(CH2)3NH2, CH3(CH2)7NH2, CH3(CH2)9NH2, CH3(CH2)11NH2, CH3(CH2)15NH2, CH3(CH2)17NH2, HOOC(CH2)5NH2, HOOC(CH2)11NH2, (CH3)4N+Cl−, CH3(CH2)17NH(CH3), CH3(CH2)17N+(CH3)Br−, CH3(CH2)11N+(CH3)Br−, (CH3(CH2)17)2N+(CH3)Br−, CH3(CH2)17N+(C6H5)CH2(CH3)2Br−, CH3(CH2)17N+(HOCH2CH2)CH3Cl−, CH3(CH2)14CH2(C5H5N+)Br−, H2N(CH2)6NH2 and H2N(CH2)12NH2;
- and
- (b) spray coating the composite solution onto the surface of an ion exchange film membrane.
A fuel cell comprising:
- (a) an anode compartment having an anode;
- (b) a cathode compartment having an cathode;
- and
- (c) an ion exchange composite membrane, serving as a separator and electrolyte, with dispersed clay as a barrier material, positioned between the anode and cathode.
A composite solution dispersing clay in an ion conducting polymeric solution, wherein said clay includes a modified organic clay organized by at least one agent selected from the group consisting of CH3NH3+Cl−, CH3(CH2)2NH2, CH3(CH2)3NH2, CH3(CH2)7NH2, CH3(CH2)9NH2, CH3(CH2)11NH2, CH3(CH2)15NH2, CH3(CH2)17NH2, HOOC(CH2)5NH2, HOOC(CH2)11NH2, (CH3)4N+Cl−, CH3(CH2)17NH(CH3), CH3(CH2)17N+(CH3)Br−, CH3(CH2)11N+(CH3)Br−, (CH3(CH2)17)2N+(CH3)Br−, CH3(CH2)17N+(C6H5)CH2(CH3)2Br−, CH3(CH2)17N+(HOCH2CH2)CH3Cl−, CH3(CH2)14CH2(C5H5N+)Br−, H2N(CH2)6NH2 and H2N(CH2)12NH2.
Dependencies are inferred from the claim text.