US2007120091A1PendingUtilityA1

Performance enhancing additive material for the nickel hydroxide positive electrode in rechargeable alkaline cells

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Individually held — no corporate assignee on recordPriority: Mar 3, 2003Filed: Jan 25, 2007Published: May 31, 2007
Est. expiryMar 3, 2023(expired)· nominal 20-yr term from priority
Inventors:Stanford R. OvshinskyBoyko AladjovSrinivasan VenkatesanBora TekkanatMeera VijanHong WangSubhash Dhar
H01M 4/62H01M 4/52H01M 4/50H01M 10/345H01M 4/364H01M 10/4235H01M 4/32H01M 4/48Y02E60/10
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Claims

Abstract

A conductive additive for the positive nickel electrode for electrochemical cells which provides increased performance by suppressing an oxygen evolution reaction occurring parallel to the oxidation of nickel hydroxide, increasing conductivity of the electrode and/or consuming oxygen produced as a result of the oxygen evolution reaction.

Claims

exact text as granted — not AI-modified
1 . An active material composition for a nickel positive electrode comprising: 
 a nickel hydroxide material; and    an additive material comprising a solid solution, said solid solution comprising two or more metals.    
   
   
       2 . The active material composition according to  claim 1 , wherein said solid solution additive lacks nickel.  
   
   
       3 . The active material composition according to  claim 1 , wherein said solid solution additive includes two or more metals having an oxidation state of +2 or higher.  
   
   
       4 . The active material composition according to  claim 1 , wherein said solid solution additive includes two or more metals having an oxidation state of +3 or higher.  
   
   
       5 . The active material composition according to  claim 1 , wherein said solid solution additive is a metal oxide, said metal oxide incorporating said two or more metals.  
   
   
       6 . The active material composition according to  claim 1 , wherein said solid solution additive does not form a solid solution with said nickel hydroxide material.  
   
   
       7 . The active material composition according to  claim 1 , wherein the structure of said solid solution additive differs from the structure of said nickel hydroxide material.  
   
   
       8 . The active material composition according to  claim 1 , wherein said solid solution additive comprises cerium.  
   
   
       9 . The active material composition according to  claim 1 , wherein said solid solution additive comprises three or more metals.  
   
   
       10 . The active material composition according to  claim 1 , wherein said nickel hydroxide material further comprises Co.

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