US2003113623A1PendingUtilityA1

Oxazoline surfactant anode additive for alkaline electrochemical cells

45
Priority: Dec 14, 2001Filed: Dec 14, 2001Published: Jun 19, 2003
Est. expiryDec 14, 2021(expired)· nominal 20-yr term from priority
Inventors:Ernest Ndzebet
H01M 4/62H01M 4/02H01M 4/628H01M 12/06H01M 2300/0014H01M 4/06H01M 4/42
45
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Claims

Abstract

According to the present invention an alkaline electrochemical cell can contain an anode having an anode active material, an alkaline electrolyte, a gelling agent and an oxazoline surfactant additive. The invention relates to an anode mix, to an anode containing the mix, and to an electrochemical cell containing the anode and to methods for making the anode mix, the anode and the cell. Performance improvements can be realized when the oxazoline surfactant is provided in the anode, which can include increased operating voltage, good high rate pulse capability, elimination of initial potential dip, good shelf life and reduced sensitivity to open circuit rest.

Claims

exact text as granted — not AI-modified
I claim:  
     
         1 . An anode mix comprising an alkaline electrolyte, an anode active material, a gelling agent and an oxazoline surfactant.  
     
     
         2 . The anode mix of  claim 1  wherein the oxazoline surfactant comprises a fatty side chain.  
     
     
         3 . The anode mix of  claim 2  wherein the oxazoline surfactant is ethanol, 2,2′-[(2-heptadecyl-4(5H)-oxazolydine) bis (methyleneoxy-2,1 -ethanedyloxy]bis.  
     
     
         4 . The anode mix of  claim 2  wherein the oxazoline surfactant comprising the fatty side chain is Alkaterge T-IV.  
     
     
         5 . The anode mix of  claim 1 , wherein the alkaline electrolyte is potassium hydroxide.  
     
     
         6 . The anode mix of  claim 1 , wherein the anode active material is particulate zinc powder.  
     
     
         7 . The anode mix of  claim 1 , wherein the surfactant coats at least a portion of the anode active material.  
     
     
         8 . An anode for use in an electrochemical cell, the anode comprising the anode mix of any of claims  1 - 7 .  
     
     
         9 . An alkaline electrochemical cell comprising a cathode, an anode, and an alkaline electrolyte in electrical contact with the anode and the cathode, the anode comprising an anode active material, a gelling agent and an oxazoline surfactant.  
     
     
         10 . The alkaline electrochemical cell of  claim 9  wherein the oxazoline surfactant comprises a fatty side chain.  
     
     
         11 . The alkaline electrochemical cell of  claim 10  wherein the oxazoline surfactant is ethanol, 2,2′-[(2-heptadecyl-4(5H)-oxazolydine) bis (methyleneoxy-2,1-ethanedyloxy]bis.  
     
     
         12 . The alkaline electrochemical cell of  claim 10  wherein the oxazoline surfactant comprising the fatty side chain is Alkaterge T-IV.  
     
     
         13 . The alkaline electrochemical cell of  claim 9  wherein the alkaline electrolyte is potassium hydroxide.  
     
     
         14 . The alkaline electrochemical cell of  claim 9  wherein the anode active material is particulate zinc powder.  
     
     
         15 . The alkaline electrochemical cell of  claim 9  wherein the surfactant coats at least a portion of the anode active material.

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