Non-aqueous electrochemical cells

• US 7,927,739 B2
• Filed: 06/11/2008
• Issued: 04/19/2011
• Est. Priority Date: 12/14/2001
• Status: Expired due to Fees

• Current Assignee: Duracell U.S. Operations, Inc. (Berkshire Hathaway Incorporated)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: Issaev, Nikolai N., Pozin, Michael
• Primary Examiner(s): Cantelmo; Gregg
• Assistant Examiner(s): Wang; Eugenia
• Application Number:
  US12/137,100
• Publication Number:
  US 20080261110A1
• Time in Patent Office: 1,042 Days
• Field of Search: 429/188, 429/199, 429/211, 429/221, 429/224, 429/245
• US Class Current: 429/199
• 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 cathode current collector including stainless steel, and an electrolyte containing a perchlorate salt and a second salt.

Claims

1. A primary electrochemical cell, comprising:

a cylindrical housing having a positive end cap comprising aluminum at an end of the cylindrical housing;

an anode comprising lithium;

a cathode comprising manganese dioxide and/or iron disulfide;

an electrolyte comprising a perchlorate salt, wherein the electrolyte includes between 300 ppm and 20,000 ppm of the perchlorate salt;

a cathode current collector comprising a first aluminum alloy; and

a positive lead, centrally located in the cylindrical housing, comprising a second aluminum alloy different from the first aluminum alloy connected to and in electrical contact with the cathode current collector and extending from the cathode current collector to the positive end cap.

2. The cell of claim 1, wherein the cathode comprises manganese dioxide.

3. The cell of claim 1, wherein the cathode comprises iron disulfide.

4. The cell of claim 1, wherein the anode comprises a lithium alloy.

5. The cell of claim 1, wherein the electrolyte includes between 500 ppm and 20,000 ppm of the perchlorate salt.

6. The cell of claim 1, wherein the electrolyte includes between 300 ppm and 10,000 ppm of the perchlorate salt.