CARBON MATERIALS COMPRISING AN ELECTROCHEMICAL MODIFIER

• US 20110159375A1
• Filed: 12/10/2010
• Published: 06/30/2011
• Est. Priority Date: 12/11/2009
• Status: Abandoned Application

• Current Assignee: BASF SE
• Original Assignee: EnerG2, Inc.
• Inventors: Geramita, Katharine, Maroon, Matthew J., Chang, Alan Tzu-Yang, Feaver, Aaron M., Costantino, Henry R.
• Application Number:
  US12/965,709
• Publication Number:
  US 20110159375A1
• Time in Patent Office: Days
• US Class Current: 429/302
• CPC Class Codes: C01B 32/05 Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
• CPC Class Codes: H01G 11/24 characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
• CPC Class Codes: H01G 11/34 characterised by carbonisation or activation of carbon
• CPC Class Codes: H01G 11/46 Metal oxides
• CPC Class Codes: H01M 10/06 Lead-acid accumulators semi-lead accumulators H01M10/20
• CPC Class Codes: H01M 4/583 Carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

The present application is directed to carbon materials comprising an electrochemical modifier. The carbon materials find utility in any number of electrical devices, for example, in lead acid batteries. Methods for making the disclosed carbon materials are also disclosed.

Claims

1. A carbon material comprising at least 1,000 ppm of an electrochemical modifier, wherein the electrochemical modifier comprises lead, tin, antimony, bismuth, arsenic, tungsten, silver, zinc, cadmium, indium, sulfur, silicon or combinations thereof, and wherein the carbon material comprises a total of less than 500 ppm of all other elements having atomic numbers ranging from 11 to 92, as measured by proton induced x-ray emission.

2. The carbon material of claim 1, wherein the carbon material comprises a total of less than 200 ppm of all other elements having atomic numbers ranging from 11 to 92 as measured by proton induced x-ray emission.

3. The carbon material of claim 1, wherein the electrochemical modifier is in elemental form or is in an oxidized form.

4. The carbon material of claim 3, wherein the electrochemical modifier is in the form of a metal oxide.

5. The carbon material of claim 1, wherein the carbon material comprises at least 0.5% (wt/wt) of the electrochemical modifier.

6. The carbon material of claim 5, wherein the carbon material comprises at least 50% (wt/wt) of the electrochemical modifier.

7. The carbon material of claim 6, wherein the carbon material comprises at least 90% (wt/wt) of the electrochemical modifier.

8. The carbon material of claim 1, wherein the electrochemical modifier comprises lead.

9. The carbon material of claim 8, wherein the lead is in the form of elemental lead, lead (II) oxide, lead (IV) oxide, lead sulfate or combinations thereof.

10. The carbon material of claim 8, wherein the lead is in the form of lead acetate, lead carbonate, lead sulfate, lead orthoarsenate, lead pyroarsenate, lead bromide, lead caprate, lead carproate, lead caprylate, lead chlorate, lead chloride, lead fluoride, lead nitrate, lead oxychloride, lead orthophosphate sulfate, lead sulfide, lead tungstate or combinations thereof.

11. The carbon material of claim 1, wherein the electrochemical modifier comprises tin.

12. The carbon material of claim 11, wherein the tin is in oxidized form.

13. The carbon material of claim 1, wherein the electrochemical modifier comprises antimony.

14. The carbon material of claim 13, wherein the antimony is in oxidized form.

15. The carbon material of claim 1, wherein the electrochemical modifier comprises bismuth.

16. The carbon material of claim 15, wherein the bismuth is in oxidized form.

17. The carbon material of claim 1, wherein the ash content of the carbon material, excluding the ash associated with the electrochemical modifier, is less than 0.03% as calculated from proton induced x-ray emission data.

18. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm iron as measured by proton induced x-ray emission.

19. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm nickel as measured by proton induced x-ray emission.

20. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm cobalt as measured by proton induced x-ray emission.

21. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm titanium as measured by proton induced x-ray emission.

22. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm chromium as measured by proton induced x-ray emission.

23. The carbon material of claim 1, wherein the carbon material comprises less than 5 ppm copper as measured by proton induced x-ray emission.

24. The carbon material of claim 1, wherein the carbon material comprises less than 100 ppm sodium, less than 300 ppm silicon, less than 100 ppm potassium, less than 100 ppm calcium, less than 20 ppm iron, less than 10 ppm nickel, less than 140 ppm copper, less than 50 ppm aluminum and less than 5 ppm chromium as measured by proton induced x-ray emission.

25. The carbon material of claim 24, wherein the carbon material comprises less than 50 ppm sodium, less than 50 ppm silicon, less than 30 ppm potassium, less than 10 ppm calcium, less than 2 ppm iron, less than 1 ppm nickel, less than 1 ppm copper, less than 10 ppm aluminum and less than 1 ppm chromium as measured by proton induced x-ray emission.

26. The carbon material of claim 1, wherein the carbon material comprises a pyrolyzed polymer cryogel.

27. The carbon material of claim 1, wherein the carbon material comprises an activated polymer cryogel.

28. The carbon material of claim 1, wherein the carbon material comprises a BET specific surface area of at least 500 m²/g.

29. The carbon material of claim 1, wherein the carbon material comprises a BET specific surface area of at least 1000 m²/g.

30. The carbon material of claim 1, wherein the carbon material comprises a BET specific surface area of at least 1500 m²/g.

31. The carbon material of claim 1, wherein the carbon material comprises a BET specific surface area of at least 2000 m²/g.

32. The carbon material of claim 1, wherein the carbon material comprises a total pore volume of at least 2.0 cc/g.

33. The carbon material of claim 1, wherein the carbon material comprises a total pore volume of at least 1.0 cc/g.

34. The carbon material of claim 1, wherein the carbon material comprises a pore volume of at least 0.25 cc/g for pores less than 20 angstroms.

35. The carbon material of claim 1, wherein the carbon material comprises a pore volume of at least 0.75 cc/g for pores greater than 20 angstroms.

36. The carbon material of claim 1, wherein the carbon material comprises a pore volume of at least 1.50 cc/g for pores greater than 20 angstroms.

37. An electrical energy storage device comprising a carbon material comprising at least 1,000 ppm of an electrochemical modifier, wherein the electrochemical modifier comprises lead, tin, antimony, bismuth, arsenic, tungsten, silver, zinc, cadmium, indium, sulfur, silicon or combinations thereof, and wherein the carbon material comprises a total of less than 500 ppm of all other elements having atomic numbers ranging from 11 to 92, as measured by proton induced x-ray emission.

38. The device of claim 37, wherein the device is a battery comprising:

a) at least one positive electrode comprising a first active material in electrical contact with a first current collector;

b) at least one negative electrode comprising a second active material in electrical contact with a second current collector; and

c) an electrolyte;

wherein the positive electrode and the negative electrode are separated by an inert porous separator, and wherein at least one of the first or second active materials comprises the carbon material.

39. The device of claim 38, wherein both the first and second active materials comprise the carbon material.

40. The device of claim 38, wherein the first or second current collector comprises lead.

41. The device of claim 38, wherein the electrolyte comprises sulfuric acid and water.

42. The device of claim 38, wherein the electrolyte comprises silica gel.

43. The device of claim 37, wherein the electrochemical modifier is lead.

44. The device of claim 43, wherein the lead is in the form of elemental lead, lead (II) oxide, lead (IV) oxide or combinations thereof.

45. The device of claim 43, wherein the lead is in the form of lead acetate, lead carbonate, lead sulfate, lead orthoarsenate, lead pyroarsenate, lead bromide, lead caprate, lead carproate, lead caprylate, lead chlorate, lead chloride, lead fluoride, lead nitrate, lead oxychloride, lead orthophosphate sulfate, lead sulfide, lead tungstate or combinations thereof

46. An electrode comprising a binder and a carbon material comprising at least 1,000 ppm of an electrochemical modifier, wherein the electrochemical modifier comprises lead, tin, antimony, bismuth, arsenic, tungsten, silver, zinc, cadmium, indium, sulfur, silicon or combinations thereof, and wherein the carbon material comprises a total of less than 500 ppm of all other elements having atomic numbers ranging from 11 to 92, as measured by proton induced x-ray emission.

47. The electrode of claim 46, wherein the electrochemical modifier is lead.

48. The electrode of claim 47, wherein the lead is in the form of elemental lead, lead (II) oxide, lead (IV) oxide or combinations thereof

49. The electrode of claim 47, wherein the lead is in the form of lead acetate, lead carbonate, lead sulfate, lead orthoarsenate, lead pyroarsenate, lead bromide, lead caprate, lead carproate, lead caprylate, lead chlorate, lead chloride, lead fluoride, lead nitrate, lead oxychloride, lead orthophosphate sulfate, lead sulfide, lead tungstate or combinations thereof.

50. A method for making a carbon material comprising an electrochemical modifier, the method comprising:

(a) reacting one or more polymer precursors to obtain a polymer gel;

(b) freeze drying the polymer gel to obtain a polymer cryogel;

(c) pyrolyzing the polymer cryogel to obtain a pyrolyzed polymer cryogel; and

(c) activating the pyrolyzed cryogel to obtain an activated carbon material, the method further comprising the step of contacting the one or more polymer precursors, the polymer gel, the polymer cryogel, the pyrolyzed polymer cryogel or the activated carbon material with the electrochemical modifier, and wherein the electrochemical modifier comprises lead, tin, antimony, bismuth, arsenic, tungsten, silver, zinc, cadmium, indium, sulfur, silicon or combinations thereof.

51. The method of claim 50, wherein the electrochemical modifier comprises lead.

52. The method of claim 51, further comprising reacting the one or more polymer precursors in a solvent comprising acetic acid and water.

53. The method of claim 50, wherein the volatile basic catalyst comprises ammonium carbonate, ammonium bicarbonate, ammonium acetate, ammonium hydroxide, or combinations thereof.

54. The method of claim 50, wherein the one or more polymer precursors comprise a phenolic compound and an aldehyde.

55. The method of claim 54, wherein the phenolic compound comprises resorcinol and the aldehyde comprises formaldehyde.