Alkaline cell having a cathode including a tin dioxide additive

• US 5,501,924 A
• Filed: 06/07/1995
• Issued: 03/26/1996
• Est. Priority Date: 06/07/1995
• Status: Expired due to Fees

• Current Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Original Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Inventors: Nardi, John C., Swierbut, Wendi M.
• Primary Examiner(s): Willis, Jr., Prince
• Assistant Examiner(s): LILLEY, RICHARD
• Application Number:
  US08/479,590
• Time in Patent Office: 293 Days
• Field of Search: 429/224
• US Class Current: 429/224
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 2300/0014 Alkaline electrolytes
• CPC Class Codes: H01M 4/50 of manganese
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

Abstract

A cathode for use in an electrochemical cell having an anode and an electrolyte. The cathode includes a manganese dioxide active material and an additive which includes SnO₂. The cathode of the present invention is particularly adapted for use in an electrochemical cell having a zinc anode and an alkaline electrolyte.

Claims

1. An electrochemical cell having an anode, a cathode, and an electrolyte, said cathode comprising a manganese dioxide active material and an additive comprising SnO₂.

2. The electrochemical cell as defined in claim 1, wherein said anode includes zinc and said electrolyte is an alkaline electrolyte.

3. The electrochemical cell as defined in claim 1, wherein said additive constitutes between about 0.1 to 10 weight percent of said cathode.

4. The electrochemical cell as defined in claim 3, wherein said additive constitutes between about 1 to 5 weight percent of said cathode.

5. The electrochemical cell as defined in claim 4, wherein said additive constitutes between 1 to 2 weight percent of said cathode.