SECONDARY-BATTERY CURRENT COLLECTOR, SECONDARY-BATTERY CATHODE, SECONDARY-BATTERY ANODE, SECONDARY BATTERY AND PRODUCTION METHOD THEREOF

• US 20090029255A1
• Filed: 02/10/2006
• Published: 01/29/2009
• Est. Priority Date: 02/10/2005
• Status: Active Grant

• Current Assignee: Shohoku Laminate Co., Ltd.
• Original Assignee: Showa Denko K K
• Inventors: Ohmori, Masahiro
• Granted Patent: US 8,663,845 B2
• Time in Patent Office: Days
• US Class Current: 429/231.100
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/1391 of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/80 Porous plates, e.g. sintered carriers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A secondary-battery current collector comprising an aluminum foil and a film containing an ion-permeable compound and carbon fine particles formed thereon or a secondary-battery current collector comprising an aluminum foil, a film containing an ion-permeable compound and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer, a production method of the same, and a secondary battery having the current collector are provided.

Claims

1. A secondary-battery current collector, comprising an aluminum or copper foil and a film formed thereon containing an ion-permeable compound and carbon fine particles.

21. The secondary-battery current collector as recited in any one of claims 1 to 4, wherein the carbon fine particles are spicular or rod in shape.

52. The secondary-battery current collector as recited in any one of claims 1 to 4, wherein the compound is a crosslinked polysaccharide polymer.

57. The secondary-battery current collector as recited in any one of claims 1 to 4, wherein the number average molecular weight of the compound is 50,000 or less.

2. A secondary-battery current collector, comprising an aluminum or copper foil and a film formed thereon containing a compound non-swelling in organic solvent and carbon fine particles.

3. A secondary-battery current collector, comprising an aluminum or copper foil and a film formed thereon containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles.

4. A secondary-battery current collector, comprising an aluminum or copper foil and a film formed thereon containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles.

5. A secondary-battery cathode, comprising an aluminum foil, a film containing an ion-permeable compound and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer.

6. A secondary-battery cathode, comprising an aluminum foil, a film containing a compound non-swelling in organic solvent and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer.

7. A secondary-battery cathode, comprising an aluminum foil, a film containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer.

8. A secondary-battery cathode, comprising an aluminum foil, a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer.

9. A secondary-battery anode, comprising a copper foil, a film containing a ion-permeable compound and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and an anodic electroactive material formed thereon as the upper layer.

10. A secondary-battery anode, comprising a copper foil, a film containing a compound non-swelling in organic solvent and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and an anodic electroactive material formed thereon as the upper layer.

23. The secondary-battery anode as recited in any one of claims 9 to 12 and 17 to 20, wherein the carbon fine particles are spicular or rod in shape.

46. A method of producing a secondary battery, comprising impregnating a layer which comprises a cathode, a separator and an anode piled up in that order with an organic electrolyte solution, wherein the anode used is the anode as recited in any one of claims 9 to 12 and 17 to 20.

47. A secondary battery comprising a layer which comprises a cathode, a separator and an anode piled up in that order and is impregnated with an organic electrolyte solution, wherein the anode used is the anode as recited in any one of claims 9 to 12 and 17 to 20.

11. A secondary-battery anode, comprising a copper f oil, a film containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and an anodic electroactive material formed thereon as the upper layer.

12. A secondary-battery anode, comprising a copper foil, a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and an anodic electroactive material formed thereon as the upper layer.

13. A secondary-battery cathode, comprising an aluminum foil and a film containing an ion-permeable compound, carbon fine particles and a cathodic electroactive material formed thereon.

22. The secondary-battery cathode as recited in any one of claims 5 to 8 and 13 to 16, wherein the carbon fine particles are spicular or rod in shape.

44. A method of producing a secondary battery, comprising impregnating a layer which comprises a cathode, a separator and an anode piled up in that order with an organic electrolyte solution, wherein the cathode used is the cathode as recited in any one of claims 5 to 8 and 13 to 16.

45. A secondary battery comprising a layer which comprises a cathode, a separator and an anode piled up in that order and is impregnated with an organic electrolyte solution, wherein the cathode used is the cathode as recited in any one of claims 5 to 8 and 13 to 16.

48. The secondary-battery cathode as recited in any one of claims 5 to 8 and 13 to 16, wherein the cathodic electroactive material contains any one or more of lithium cobaltate (LiCoO₂), lithium manganate (LiMn₂O₄), lithium nickelate (LiNiO₂), ternary lithium compounds of Co, Mn, and Ni [Li(Co_xMn_yNi_z)O₂], sulfur compounds (TiS₂), and olivine compounds (LiFePO₄, LiMnPO₄).

50. The secondary battery as recited in claim 45 or 47, wherein the cathodic electroactive material contains any one or more of lithium cobaltate (LiCoO₂), lithium manganate (LiMn₂O₄), lithium nickelate (LiNiO₂), ternary lithium compounds of Co, Mn, and Ni [Li(Co_xMn_yNi_z)O₂], sulfur compounds (TiS₂), and olivine compounds (LiFePO₄, LiMnPO₄).

51. The secondary battery as recited in claim 45 or 47, wherein the anodic electroactive material contains graphite.

54. The secondary battery as recited in claim 45 or 47, wherein the compound is a crosslinked polysaccharide polymer.

55. The secondary battery as recited in claim 54, wherein the compound is a crosslinked compound of a polysaccharide polymer crosslinked with any one of acrylamide, acrylonitrile, chitosan pyrrolidone carboxylate salts, hydroxypropylchitosan, and acid anhydrides such as phthalic anhydride, maleic anhydride, trimellitic anhydride, and pyromellitic anhydride.

56. The secondary battery as recited in claim 45 or 47, wherein the lithium- or fluorine-ion conductivity of the compound is 1×

10<sup>−

2</sup> S/cm or more.

58. The secondary-battery as recited in claim 45 or 47, wherein the number average molecular weight of the compound is 50,000 or less.

59. A mobile unit and an electric power tool, carrying the secondary battery as recited in any one of claims 45, 47, 50, 51, to 56 and 58.

14. A secondary-battery cathode, comprising an aluminum foil and a film containing a compound non-swelling in organic solvent, carbon fine particles and a cathodic electroactive material formed thereon.

15. A secondary-battery cathode, comprising an aluminum foil and a film containing a compound resistant to exfoliation in the peeling test with organic solvent, carbon fine particles and a cathodic electroactive material formed thereon.

16. A secondary-battery cathode, comprising an aluminum foil and a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988), carbon fine particles and a cathodic electroactive material formed thereon.

17. A secondary-battery anode, comprising a copper foil and a film containing an ion-permeable compound, carbon fine particles and an anodic electroactive material formed thereon.

18. A secondary-battery anode, comprising a copper foil and a film containing a compound non-swelling in organic solvent, carbon fine particles and an anodic electroactive material formed thereon.

19. A secondary-battery anode, comprising a copper foil and a film containing a compound resistant to exfoliation in the peeling test with organic solvent, carbon fine particles and an anodic electroactive material formed thereon.

20. A secondary-battery anode, comprising a copper foil and a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988), carbon fine particles and an anodic electroactive material.

24. A method of producing a secondary-battery current collector, comprising forming a film containing an ion-permeable compound and carbon fine particles on an aluminum or copper foil by application.

53. The method of producing a secondary-battery current collector as recited in any one of claims 24 to 27, wherein the compound is a crosslinked polysaccharide polymer.

25. A method of producing a secondary-battery current collector, comprising forming a film containing a compound non-swelling in organic solvent and carbon fine particles on an aluminum or copper foil by application.

26. A method of producing a secondary-battery current collector, comprising forming a film containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles on an aluminum or copper foil by application.

27. A method of producing a secondary-battery current collector, comprising forming a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles on an aluminum or copper foil by application.

28. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by applying a film containing an ion-permeable compound and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and a cathodic electroactive material in a solvent thereon.

49. The method of producing a secondary-battery cathode as recited in any one of claims 28 to 31 and 36 to 39, wherein the cathodic electroactive material contains any one or more of lithium cobaltate (LiCoO₂), lithium manganate (LiMn₂O₄), lithium nickelate (LiNiO₂), ternary lithium compounds of Co, Mn, and Ni [Li(Co_xMn_yNi_z)O₂], sulfur compounds (TiS₂), and olivine compounds (LiFePO₄, LiMnPO₄).

29. A method of producing a secondary-battery cathode, comprising forming a film on aluminum foil by applying a film containing a compound non-swelling in organic solvent and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and a cathodic electroactive material in a solvent thereon.

30. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by applying a film containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and a cathodic electroactive material in a solvent thereon.

31. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by applying a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and a cathodic electroactive material in a solvent thereon.

32. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by applying a film containing an ion-permeable compound and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and an anodic electroactive material in a solvent thereon.

33. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by applying a film containing a compound non-swelling in organic solvent and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and an anodic electroactive material in a solvent thereon.

34. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by applying a film containing a compound resistant to exfoliation in a peeling test with organic solvent and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and an anodic electroactive material in a solvent thereon.

35. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by applying a film containing a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988) and carbon fine particles and additionally coating a dispersion of a binder, carbon fine particles and an anodic electroactive material in a solvent thereon.

36. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by coating and drying a dispersion of an ion-permeable compound, carbon fine particles and a cathodic electroactive material in a solvent thereon.

37. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by coating and drying a dispersion of a compound non-swelling in organic solvent, carbon fine particles and a cathodic electroactive material in a solvent thereon.

38. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by coating and drying a dispersion of a compound resistant to exfoliation in the peeling test with organic solvent, carbon fine particles and a cathodic electroactive material in a solvent thereon.

39. A method of producing a secondary-battery cathode, comprising forming a film on an aluminum foil by coating and drying a dispersion of a compound resistant to exfoliation in the tape-peeling test (JIS D0202-1988), carbon fine particles and a cathodic electroactive material in a solvent thereon.

40. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by coating and drying a dispersion of an ion-permeable compound, carbon fine particles and an anodic electroactive material in a solvent thereon.

41. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by coating and drying a dispersion of a compound non-swelling in organic solvent, carbon fine particles and an anodic electroactive material in a solvent thereon.

42. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by coating and drying a dispersion of a compound resistant to exfoliation in the peeling test with organic solvent, carbon fine particles and an anodic electroactive material in a solvent thereon.

43. A method of producing a secondary-battery anode, comprising forming a film on a copper foil by coating and drying a dispersion of a compound resistant to exfoliation in a tape-peeling test (JIS D0202-1988), carbon fine particles and anodic electroactive material in a solvent thereon.