Hydrogen generators for fuel cells

• US 8,071,242 B2
• Filed: 05/23/2006
• Issued: 12/06/2011
• Est. Priority Date: 11/13/2001
• Status: Active Grant

• Current Assignee: Zn2h2 Incorporated
• Original Assignee: Eldat Communication, Ltd. (Pricer AB)
• Inventors: Rosenfeld, Oren, Goldstein, Jonathan Russell
• Primary Examiner(s): Kalafut, Stephen J.
• Application Number:
  US11/438,923
• Publication Number:
  US 20060210847A1
• Time in Patent Office: 2,023 Days
• Field of Search: 429/19, 429/21, 429/421, 423/657, 423/658, 205/639, 455/572, 446/484, 48/61, 406/420.1
• US Class Current: 429/421
• CPC Class Codes: C01B 3/08 with metals
• CPC Class Codes: H01M 8/065 by dissolution of metals or alloys; by dehydriding metallic substances
• CPC Class Codes: Y02E 60/36 Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

A hydrogen generator, operative to provide molecular hydrogen to an anode of a fuel cell, including a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum and a method for electrical power generation using a fuel cell and a hydrogen generator.

Claims

1. A hydrogen generator operative to provide molecular hydrogen to an anode of a fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum,

wherein the extent of availability of said catalyst is controllable.

2. A hydrogen generator according to claim 1 and wherein said catalyst includes at least one of a metal belonging to the platinum metal group, a metal belonging to the transition metal group, a metal oxide belonging to the platinum metal group and a metal oxide belonging to the transition metal group.

3. A hydrogen generator according to claim 2 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

4. A hydrogen generator according to claim 1 and wherein said base includes at least one of hydroxide of potassium, sodium and lithium.

5. A hydrogen generator according to claim 4 and wherein said at least one of hydroxide of potassium, sodium and lithium is provided in solution in water.

6. A hydrogen generator according to claim 1 and wherein said acid includes at least one of sulfuric acid and citric acid.

7. A hydrogen generator according to claim 6 and wherein said at least one of sulfuric acid and citric acid is provided in solution in water.

8. A hydrogen generator according to claim 1 and said water-based fuel includes zinc and said catalyst comprises an impurity in said zinc.

9. A hydrogen generator according to claim 8 and wherein said impurity comprises a transition metal.

10. A hydrogen generator according to claim 8 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

11. A hydrogen generator according to claim 1 and said water-based fuel includes aluminum and said catalyst comprises an impurity in said aluminum.

12. A hydrogen generator according to claim 9 and wherein said impurity comprises a transition metal.

13. A hydrogen generator according to claim 11 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

14. A hydrogen generator according to claim 1 and said water-based fuel includes magnesium and said catalyst comprises an impurity in said magnesium.

15. A hydrogen generator according to claim 14 and wherein said impurity comprises a transition metal.

16. A hydrogen generator according to claim 14 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

17. A hydrogen generator according to claim 1 and wherein said catalyst is formed onto an element which is selectably introducible into said fuel.

18. A hydrogen generator according to claim 17 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

19. A hydrogen generator according to claim 1 and wherein said catalyst is selectably introducible into said fuel.

20. A hydrogen generator according to claim 19 and also comprising a catalyst displacer which is operative to selectably mechanically introduce said catalyst into said fuel.

21. A hydrogen generator according to claim 20 and also comprising a catalyst displacement controller which is operative to control the extent of introduction of said catalyst into said fuel.

22. A hydrogen generator according to claim 21 and wherein said catalyst displacement controller employs feedback functionality.

23. A hydrogen generator according to claim 19 wherein said catalyst is selectably introduced into said fuel in liquid form.

24. A hydrogen generator according to claim 23 and also comprising a liquid catalyst introduction controller which is operative to control the extent of introduction of said catalyst into said fuel.

25. A hydrogen generator according to claim 24 and wherein said liquid catalyst introduction controller employs feedback functionality.

26. A hydrogen generator according to claim 19 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, chromate, stannate, perchlorate acid, salts and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

27. A hydrogen generator according to claim 1 and wherein:

said catalyst defines a hydrogen generator cathode;

said at least one of zinc, magnesium, iron and aluminum defines a hydrogen generator anode; and

said hydrogen generator anode and said hydrogen generator cathode are electrically interconnected across a resistor.

28. A hydrogen generator according to claim 27 and wherein said hydrogen generator produces electrical power.

29. A hydrogen generator according to claim 1 and wherein:

said catalyst defines a hydrogen generator cathode;

said at least one of zinc, magnesium, iron and aluminum defines a hydrogen generator anode; and

said hydrogen generator anode and said hydrogen generator cathode are electrically interconnected across a variable resistor.

30. A hydrogen generator according to claim 1 and wherein:

said catalyst defines a hydrogen generator cathode;

said at least one of zinc, magnesium, iron and aluminum defines a hydrogen generator anode; and

said hydrogen generator anode and said hydrogen generator cathode are electrically interconnected across a current controller.

31. A hydrogen generator according to claim 30 and wherein said current controller is a variable resistance and wherein varying the resistance varies the output of said hydrogen generator.

32. A hydrogen generator according to claim 1 and wherein said salt is selected from a group consisting of halides, trihalides, acetates, sulfates, nitrates, borates, acid salts, chromate, stannate, perchlorate and basic salts of Group I metals, ammonium, Group II metals and Group III metals.

33. A hydrogen generator according to claim 1 and wherein the extent of availability of said water-based fuel is controllable.

34. A hydrogen generator according to claim 33 and wherein availability of said water-based fuel is controllable by selectable introduction of water to a matrix comprising:

at least one of salts, bases and acids;

at least one of zinc, magnesium, iron and aluminum and alloys thereof; and

said catalyst.

35. An electric power generator according to claim 1 and wherein said electric power generator is fitted inside at least one of mobile electronic apparatus and portable electronic apparatus.

36. A method for electrical power generation comprising:

employing a fuel cell;

powering said fuel cell by employing a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum; and

controlling an extent of availability of said catalyst.

37. A method according to claim 36 and wherein said catalyst is selectably introducible into said fuel.

38. A method according to claim 37 and also comprising selectably mechanically introducing said catalyst into said fuel.

39. A method according to claim 38 and also comprising controlling the extent of introduction of said catalyst into said fuel.

40. A method according to claim 39 and wherein said controlling employs feedback functionality.

41. A method according to claim 36 wherein said catalyst is selectably introduced into said fuel in liquid form.

42. A method according to claim 41 and also comprising controlling the extent of introduction of said catalyst into said fuel.

43. A method according to claim 42 and wherein said liquid catalyst introduction controlling employs feedback functionality.

44. A method according to claim 36 and also comprising employing said hydrogen generator to produce electrical power which is supplied together with electrical power from said fuel cell.

45. A method according to claim 36 and also comprising controlling an extent of availability of said water-based fuel.

46. A method according to claim 45 and wherein said controlling is effected by selectable introduction of water to a matrix comprising:

at least one of salts, bases and acids;

at least one of zinc, magnesium, iron, aluminum, tin, calcium, sodium, lithium, metal hydrides based on nickel, titanium, rare earth metals and alloys thereof; and

said catalyst.

47. A method according to claim 36 and wherein said base includes at least one of hydroxide of potassium, sodium and lithium.

48. A method according to claim 47 and wherein said at least one of hydroxide of potassium, sodium and lithium is provided in solution in water.

49. A method according to claim 36 and wherein said acid includes at least one of sulfuric acid and citric acid.

50. A method according to claim 49 and wherein said at least one of sulfuric acid and citric acid is provided in solution in water.

51. A method according to claim 36 and also comprising fitting said fuel cell and said hydrogen generator inside at least one of mobile electronic apparatus and portable electronic apparatus.

52. A method of operating an electronic shelf label including a display, said method comprising:

employing a fuel cell including;

powering said fuel cell by employing a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum; and

controlling an extent of availability of said catalyst.

53. A method according to claim 52 and wherein said catalyst is selectably introducible into said fuel.

54. A method according to claim 53 and also comprising selectably mechanically introducing said catalyst into said fuel.

55. A method according to claim 54 and also comprising controlling the extent of introduction of said catalyst into said fuel.

56. A method according to claim 55 and wherein said controlling employs feedback functionality.

57. A method according to claim 52 wherein said catalyst is selectably introduced into said fuel in liquid form.

58. A method according to claim 57 and also comprising controlling the extent of introduction of said catalyst into said fuel.

59. A method according to claim 58 and wherein said liquid catalyst introduction controlling employs feedback functionality.

60. A method according to claim 52 and also comprising employing said hydrogen generator to produce electrical power which is supplied together with electrical power from said fuel cell.

61. A method according to claim 52 and also comprising controlling an extent of availability of said water-based fuel.

62. A method according to claim 61 and wherein said controlling is effected by selectable introduction of water to a matrix comprising:

at least one of salts, bases and acids;

at least one of zinc, magnesium, iron, aluminum, tin, calcium, sodium, lithium, metal hydrides based on at least one of nickel, titanium, rare earth metals and alloys thereof; and

said catalyst.

63. A method according to claim 52 and wherein said base includes at least one of hydroxide of potassium, sodium and lithium.

64. A method according to claim 63 and wherein said at least one of hydroxide of potassium, sodium and lithium is provided in solution in water.

65. A method according to claim 52 and wherein said acid includes at least one of sulfuric acid and citric acid.

66. A method according to claim 65 and wherein said at least one of sulfuric acid and citric acid is provided in solution in water.

67. An electronic computing system comprising:

at least one of a processor and a microprocessor; and

an electrical power generator for said at least one of a processor and a microprocessor, said electrical power generator comprising;

a fuel cell; and

a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell,

said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum,

wherein the extent of availability of said catalyst is controllable.

68. A method of operating an electronic computing system including at least one of a processor and a microprocessor, the method comprising:

employing a fuel cell to power said at least one of a processor and a microprocessor; and

powering said fuel cell by employing a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum,

wherein the extent of availability of said catalyst is controllable.

69. An electronic mobile communication device comprising:

at least one of a transmitter and a receiver; and

an electrical power generator to provide electrical power to said at least one of a transmitter and a receiver, said electrical power generator comprising;

a fuel cell; and

a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell,

said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum,

wherein the extent of availability of said catalyst is controllable.

70. A method of operating an electronic mobile communication device including at least one of a processor and a microprocessor, the method comprising:

employing a fuel cell to power said at least one of a processor and a microprocessor;

powering said fuel cell by employing a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum; and

controlling an extent of availability of said catalyst.

71. An electrically operated toy comprising:

a toy;

an electrically operated element; and

an electrical power generator to provide electrical power to said electrically operated element, said electrical power generator comprising;

a fuel cell; and

a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell,

said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum,

wherein the extent of availability of said catalyst is controllable.

72. A method of operating an electrically operated toy, the method comprising:

providing a toy;

providing an electrically operated element inside said toy;

employing a fuel cell to power said electrically operated element;

powering said fuel cell by employing a hydrogen generator operative to provide molecular hydrogen to an anode of said fuel cell, said hydrogen generator comprising a catalyst and employing a water-based fuel including one of salts, bases and acids, as well as at least one of zinc, magnesium, iron and aluminum; and

controlling an extent of availability of said catalyst.