Electrolyte additive for non-aqueous electrochemical cells

• US 20050089760A1
• Filed: 11/17/2004
• Published: 04/28/2005
• Est. Priority Date: 12/14/2001
• Status: Abandoned Application

• Current Assignee: Gillette Company (The Procter & Gamble Company)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: Blasi, Jane A., Issaev, Nikolai N., Pozin, Michael
• Application Number:
  US10/990,379
• Publication Number:
  US 20050089760A1
• Time in Patent Office: Days
• US Class Current: 429/245
• CPC Class Codes: H01M 4/502 for non-aqueous cells H01M4/505 takes precedence
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/145 for protecting against corrosion
• CPC Class Codes: H01M 6/166 by the solute
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49108 Electric battery cell making

Abstract

An electrochemical secondary cell is disclosed. The cell includes a cathode, an anode, a current collector including aluminum, and an electrolyte containing a perchlorate salt and a second salt. The electrolyte is essentially free of LiPF₆.

Claims

1-42. -42. (canceled)

43. A method of inhibiting aluminum corrosion in an electrochemical cell, the method comprising:

(a) adding a lithium perchlorate salt and a lithium salt selected from the group consisting of LiTFS, LiTFSI, and LiPF₆ to an electrolyte; and

(b) placing the electrolyte, an anode, a cathode, and an aluminum current collector into a cell case to form the cell, wherein the cell is a primary electrochemical cell.

48. The method of claim 43, wherein the anode contains lithium.

49. The method of claim 43, wherein the cathode contains MnO₂.

50. The method of claim 43, wherein the method comprises adding at least 500 ppm by weight of the lithium perchlorate to the electrolyte.

51. The method of claim 43, wherein the method comprises adding at least 1000 ppm by weight of the lithium perchlorate to the electrolyte.

52. The method of claim 43, wherein the method comprises adding at least 1500 ppm by weight of the lithium perchlorate to the electrolyte.

53. The method of claim 43, wherein the method comprises adding at least 2500 ppm by weight of the lithium perchlorate to the electrolyte.

54. The method of claim 43, wherein the method comprises adding less than 20,000 ppm by weight of the lithium perchlorate to the electrolyte.

55. The method of claim 43, wherein the cell case comprises aluminum.

56. The method of claim 55, wherein the cell case consists essentially of aluminum.

57. The method of claim 43, wherein the method comprises adding at least 5000 ppm by weight of LiPF₆ to the electrolyte.

58. The method of claim 43, wherein the method comprises adding at least 10,000 ppm by weight of LiPF₆ to the electrolyte.

59. The method of claim 43, wherein the method does not comprise adding LiPF₆ to the electrolyte, and the electrolyte is essentially free of LiPF₆.

44-47. -47. (canceled)