P
USRE37935EExpiredUtilityPatentIndex 59

Cadmium non-sintered negative electrode for an alkaline storage cell and its manufacturing method

Assignee: SANYO ELECTRIC COPriority: Jan 17, 1989Filed: Jul 31, 2000Granted: Dec 10, 2002
Est. expiryJan 17, 2009(expired)· nominal 20-yr term from priority
Inventors:TAKEMURA MASAKAZUHONDA HIRONORITERASAKA MASAYUKI
H01M 4/246H01M 4/742H01M 4/621H01M 4/62H01M 4/0404H01M 4/38H01M 4/624H01M 4/36H01M 2004/021Y02E60/10
59
PatentIndex Score
2
Cited by
5
References
21
Claims

Abstract

A cadmium non-sintered negative electrode for use in an alkaline storage cell comprising a main active material comprising at least one of powdered cadmium oxide and powdered cadmium hydroxide; a reserve charging substance comprising powdered metal cadmium; and an additive comprising powdered nickel hydroxide whose grain shape is substantially globe and/or whose average grain size is 1.5 to 200 mum.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. A cadmium non-sintered negative electrode for use in an alkaline storage cell, comprising: 
       a main active material comprising at least one of powdered cadmium oxide and powdered cadmium hydroxide; a reserve charging substance comprising powdered metal cadmium; and  
       an additive comprising powdered nickel hydroxide whose grain shape is substantially globe.  
     
     
       2. A negative electrode of  claim 1 , wherein the nickel hydroxide is added in a weight ratio of 0.5 wt. % to 3.0 wt. %. 
     
     
       3. A negative electrode of  claim 1 , wherein the powdered nickel hydroxide has an average grain size of 1.5 to 200 μm. 
     
     
       4. A negative electrode of  claim 1 , wherein the powdered metal cadmium is formed of fine grains. 
     
     
       5. A negative electrode of  claim 1 , wherein the powdered metal cadmium has an average grain size of 1.0 to 2.4 μm. 
     
     
       6. A cadmium non-sintered negative electrode for use in an alkaline storage cell, comprising: 
       a main active material comprising at least one of powdered cadmium oxide and powdered cadmium hydroxide;  
       a reserve charging substance comprising powdered metal cadmium; and  
       an additive comprising powdered nickel hydroxide formed of substantially globe grains whose average grain size is 1.5 to 200 μm.  
     
     
       7. A negative electrode of  claim 6 , wherein the nickel hydroxide is added in a weight ratio of 0.5 wt. % to 3.0 wt. %. 
     
     
       8. A negative electrode of  claim 6 , wherein the powdered metal cadmium is formed of fine grains. 
     
     
       9. A negative electrode of  claim 6 , wherein the powdered metal cadmium has an average grain size of 1.0 to 2.4 μm. 
     
     
       10. An alkaline storage cell comprising the cadmium non- sintered negative electrode of    claim 1   , an alkaline electrolyte and a positive nickel electrode.   
     
     
       11. An alkaline storage cell comprising the cadmium non- sintered negative electrode of    claim 6   , an alkaline electrolyte and a positive nickel electrode.   
     
     
       12. An alkaline storage cell comprising: 
         a cadmium non - sintered negative electrode comprising:    
       
         a main active material comprising at least one of powdered cadmium oxide and powdered cadmium hydroxide;  
       
       
         a reserve charging substance comprising powdered metal cadmium; and  
       
       
         an additive comprising powdered nickel hydroxide whose grain shape is substantially globe;  
       
       
         an alkaline electrolyte; and  
       
       
         a positive nickel electrode. 
       
     
     
       13. The alkaline storage cell of  claim 12 , wherein the powdered nickel hydroxide is added in a weight ratio of  0 . 5  wt. %  to  3 . 0  wt.  % .   
     
     
       14. The alkaline storage cell of  claim 12 , wherein the powdered nickel hydroxide has an average grain size of  1 . 5  to  200  μm. 
     
     
       15. The alkaline storage cell of  claim 12 , wherein the powdered metal cadmium has an average grain size of  1 . 0  to  2 . 4  μm. 
     
     
       16. An alkaline storage cell formed by combining the cadmium non- sintered negative electrode of    claim 1   , an alkaline electrolyte and a positive nickel electrode.   
     
     
       17. An alkaline storage cell formed by combining the cadmium non- sintered negative electrode of    claim 6   , an alkaline electrolyte and a positive nickel electrode.   
     
     
       18. An alkaline storage cell comprising: 
         a cadmium non - sintered negative electrode formed by combining an electrode composition comprising:    
       
         a main active material comprising at least one of powdered cadmium oxide and powdered cadmium hydroxide;  
       
       
         a reserve charging substance comprising powdered metal cadmium; and  
       
       
         an additive comprising powdered nickel hydroxide whose grain shape is substantially globe;  
       
       
         an alkaline electrolyte; and  
       
       
         a positive nickel electrode. 
       
     
     
       19. The alkaline storage cell of  claim 18 , wherein the powdered nickel hydroxide is added in a weight ratio of  0 . 5  wt. %  to  3 . 0  wt.  % .   
     
     
       20. The alkaline storage cell of  claim 18 , wherein the powdered nickel hydroxide has an average grain size of  1 . 5  to  200  μm. 
     
     
       21. The alkaline storage cell of  claim 18 , wherein the powdered metal cadmium has an average grain size of  1 . 0  to  2 . 4  μm.

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