Proton permselective solid-state member and apparatus utilizing said permselective member

• US 4,024,036 A
• Filed: 01/28/1976
• Issued: 05/17/1977
• Est. Priority Date: 02/03/1975
• Status: Expired due to Term

• Current Assignee: Agency of Industrial Science & Technology (Government of Japan)
• Original Assignee: Agency of Industrial Science & Technology (Government of Japan)
• Inventors: Nakamura, Osamu, Ogino, Isao, Kodama, Teruo, Miyake, Yoshizo
• Primary Examiner(s): Mack, John H.
• Assistant Examiner(s): Feeley, H. A.
• Application Number:
  US05/653,219
• Time in Patent Office: 475 Days
• Field of Search: 136/86 F, 204/129, 204/295, 429/33, 429/193
• US Class Current: 204/266
• CPC Class Codes: C25B 13/04 characterised by the material
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 8/10 Fuel cells with solid electrolytes
• CPC Class Codes: H01M 8/1004 characterised by membrane-electrode assemblies [MEA] H01M8/12 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

Disclosed is a proton permselective solid-state member which is formed of a heteropoly acid represented by the generic formula, H_m [X_x.sup.. Y_y.sup.. O_z ].sup.. nH₂ O, or a salt thereof. Said permselective member can be used as an electrolyte in the fuel cell and as a permselective membrane in the hydrogen gas refining system.

Claims

1. A proton permselective solid-state member, formed by shaping at least one member selected from the group consisting of heteropoly acids represented by the generic formula:

space="preserve" listing-type="equation">H.sub.m [X.sub.x Y.sub.y O.sub.z ].sup.. nH.sub.2 O

wherein, X stands for at least one member selected from the group consisting of boron, aluminum, gallium, silicon, germanium, tin, phosphorus, arsenic, antimony, bismuth, selenium, tellurium, iodine and transition metals belonging to the fourth, fifth and sixth periods of the Periodic Table, Y is at least one member selected from transition metals belonging to the fourth, fifth, and sixth periods of the Periodic Table, and wherein m has a value of from 2 to 10, y has a value of from 1 to 12, n has a value of from 3 to 100 all based on X taken as 1 and z has a positive numerical value and salts of said acids.

2. The permselective member according to claim 1, wherein different transition metals are used as the substituents X and Y of the formula.

3. The permselective member according to claim 1, wherein said shaping of a heteropoly acid or salt thereof is carried out under a pressure of not less than 100 kg/cm².

4. The permselective member according to claim 3, wherein said shaping under pressure is carried out after a fluorine resin has been incorporated into the heteropoly acid or salt thereof.

5. The permselective member according to claim 4, wherein said fluorine resin is incorporated in the amount of 0.5% by weight.

6. An apparatus having an anode chamber and a cathode chamber separated from each other by a partition wall provided with catalysts and leading wires on the surfaces thereof facing said anode and cathod chambers, said partition wall being an article obtained by shaping at least one member selected from the group consisting of heteropoly acids represented by the generic formula:

space="preserve" listing-type="equation">H.sub.m [X.sub.x Y.sub.y O.sub.z ].sup.. nH.sub.2 O

wherein, X stands for at least one member selected from the group consisting of boron, aluminum, gallium, silicon, germanium, tin, phosphorus, arsenic, antimony, bismuth, selenium, tellurium, iodine and transition metals belonging to the fourth, fifth and sixth periods of the Periodic Table, Y for at least one member selected from transition metals belonging to the fourth, fifth and sixth periods of the Periodic Table, and wherein m has a value of from 2 to 10, y has a value of from 1 to 12, n has a value of from 3 to 100, all based on X as taken 1 and z has a positive numerical value and salts of said acids.

7. The apparatus according to claim 6, further comprising means for supplying hydrogen gas to said anode chamber and oxygen gas to said cathode chamber, whereby electromotive force is detected through said leading wires.

8. The apparatus according to claim 6, further comprising means for supplying steam to said anode chamber and hydrogen gas to said cathode chamber and means for applying DC voltage to said partition wall for the purpose of electrolyzing said steam, whereby hydrogen is recovered.

9. The apparatus according to claim 6, further comprising means for supplying hydrogen-containing gas to said anode chamber and hydrogen gas to said cathode chamber and means for applying DC voltage to said partition wall for the purpose of causing proton alone in said anode chamber to penetrate into said cathode chamber, whereby hydrogen is purified.

10. The apparatus according to claim 6, further comprising means for supplying hydrogen gas to said anode chamber and oxygen-containing gas to said cathode chamber and a voltmeter connected to said leading wires, whereby existence of oxygen is detected.

11. The apparatus according to claim 6, further comprising means for supplying oxygen gas to said anode chamber and hydrogen-containing gas to said cathode chamber and a voltmeter connected to said leading wires, whereby existence of hydrogen is detected.

12. The apparatus according to claim 10, whereby the partial pressure of the oxygen is measured by the electromotive force indicated in said voltmeter.

13. The apparatus according to claim 11, whereby the partial pressure of the hydrogen is measured by the electromotive force indicated in said voltmeter.