FUEL CELL AND METHOD FOR MANUFACTURING THE SAME, ENZYME-IMMOBILIZED ELECTRODE AND METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC APPARATUS

• US 20110039165A1
• Filed: 03/10/2009
• Published: 02/17/2011
• Est. Priority Date: 03/12/2008
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tokita, Yuichi, Sugiyama, Taiki, Sakai, Hideki
• Application Number:
  US12/922,332
• Publication Number:
  US 20110039165A1
• Time in Patent Office: Days
• US Class Current: 429/401
• CPC Class Codes: C12Q 1/006 for glucose
• CPC Class Codes: H01M 4/90 Selection of catalytic material
• CPC Class Codes: H01M 8/16 Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

There is provided a fuel cell whose current density and maintenance ratio can be improved when at least glucose dehydrogenase and diaphorase are immobilized on an anode using an immobilizing material composed of poly-L-lysine and glutaraldehyde. The fuel cell has a structure in which a cathode 2 and an anode 1 face each other with an electrolyte layer 3 therebetween, the anode 1 being obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, wherein the mass ratio of the poly-L-lysine to the glutaraldehyde in an immobilizing material is 5:1 to 80:1, the mass ratio of the glucose dehydrogenase to the diaphorase is 1:3 to 200:1, and the average molecular weight of the poly-L-lysine is 21500 or more.

Claims

1. A fuel cell comprising a structure in which a cathode and an anode face each other with a proton conductor therebetween,

wherein the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the mass ratio of the poly-L-lysine to the glutaraldehyde is 5:

1 to 80;

1.

2. The fuel cell according to claim 1, wherein the electrode is composed of carbon.

3. The fuel cell according to claim 2, wherein the carbon is porous carbon.

4. The fuel cell according to claim 3, wherein the proton conductor is composed of an electrolyte containing a compound having an imidazole ring as a buffer substance.

5. The fuel cell according to claim 4, wherein at least one acid selected from the group consisting of hydrochloric acid, acetic acid, phosphoric acid, and sulfuric acid is added to the compound having an imidazole ring.

6. A method for manufacturing a fuel cell, wherein when a fuel cell having a structure in which a cathode and an anode face each other with a proton conductor therebetween, the anode being obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, is manufactured, the mass ratio of the poly-L-lysine to the glutaraldehyde is set to 5:

1 to 80;

1.

7. An electronic apparatus comprising:

one or more fuel cells,

wherein at least one of the fuel cells has a structure in which a cathode and an anode face each other with a proton conductor therebetween;

the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde; and

the mass ratio of the poly-L-lysine to the glutaraldehyde is 5;

1 to 80;

1.

8. An enzyme-immobilized electrode,

wherein at least glucose dehydrogenase and diaphorase are immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the mass ratio of the poly-L-lysine to the glutaraldehyde is 5:

1 to 80;

1.

9. A method for manufacturing an enzyme-immobilized electrode, wherein when an enzyme-immobilized electrode including at least glucose dehydrogenase and diaphorase immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde is manufactured, the mass ratio of the poly-L-lysine to the glutaraldehyde is set to 5:

1 to 80;

1.

10. A fuel cell comprising a structure in which a cathode and an anode face each other with a proton conductor therebetween,

wherein the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the average molecular weight of the poly-L-lysine is 21500 or more.

11. A method for manufacturing a fuel cell, wherein when a fuel cell having a structure in which a cathode and an anode face each other with a proton conductor therebetween, the anode being obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, is manufactured, the average molecular weight of the poly-L-lysine is set to 21500 or more.

12. An electronic apparatus comprising:

one or more fuel cells,

wherein at least one of the fuel cells has a structure in which a cathode and an anode face each other with a proton conductor therebetween;

the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde; and

the average molecular weight of the poly-L-lysine is 21500 or more.

13. An enzyme-immobilized electrode,

wherein at least glucose dehydrogenase and diaphorase are immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the average molecular weight of the poly-L-lysine is 21500 or more.

14. A method for manufacturing an enzyme-immobilized electrode, wherein when an enzyme-immobilized electrode including at least glucose dehydrogenase and diaphorase immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde is manufactured, the average molecular weight of the poly-L-lysine is set to 21500 or more.

15. A fuel cell comprising a structure in which a cathode and an anode face each other with a proton conductor therebetween,

wherein the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the mass ratio of the glucose dehydrogenase to the diaphorase is 1:

3 to 200;

1.

16. A method for manufacturing a fuel cell, wherein when a fuel cell having a structure in which a cathode and an anode face each other with a proton conductor therebetween, the anode being obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, is manufactured, the mass ratio of the glucose dehydrogenase to the diaphorase is set to 1:

3 to 200;

1.

17. An electronic apparatus comprising:

one or more fuel cells,

wherein at least one of the fuel cells has a structure in which a cathode and an anode face each other with a proton conductor therebetween;

the anode is obtained by immobilizing at least glucose dehydrogenase and diaphorase on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde; and

the mass ratio of the glucose dehydrogenase to the diaphorase is 1;

3 to 200;

1.

18. An enzyme-immobilized electrode,

wherein at least glucose dehydrogenase and diaphorase are immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde, and

the mass ratio of the glucose dehydrogenase to the diaphorase is 1:

3 to 200;

1.

19. A method for manufacturing an enzyme-immobilized electrode, wherein when an enzyme-immobilized electrode including at least glucose dehydrogenase and diaphorase immobilized on an electrode using an immobilizing material composed of poly-L-lysine and glutaraldehyde is manufactured, the mass ratio of the glucose dehydrogenase to the diaphorase is set to 1:

3 to 200;

1.