Non-Aqueous Electrolyte Secondary Battery and Method of Manufacturing the Same

Abstract

A non-aqueous electrolyte secondary battery has an electrode plate assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte including a lithium salt and a non-aqueous solvent; and a gas absorbing element that absorbs gas produced in the secondary battery, wetting of the gas absorbing element with the non-aqueous solvent is controlled.

1 - 7 . (canceled)  
   
   
       8 . A method of manufacturing a non-aqueous electrolyte secondary battery, comprising the steps of: 
 (1) heating a carbon powder in an inert atmosphere at 600 to 1300° C. for 10 to 120 minutes to prepare a gas absorbent comprising a simple substance of carbon, said gas absorbent capable of selectively absorbing at least one selected from the group consisting of carbon dioxide and methane;    (2) preparing an electrode material mixture including said gas absorbent and an electrode active material and applying said electrode material mixture on a collector to obtain an electrode; and    (3) assembling said electrode, a separator, and a non-aqueous electrolyte to a non-aqueous electrolyte secondary battery.    
   
   
       9 . The method of manufacturing a non-aqueous electrolyte secondary battery in accordance with  claim 8 , wherein said powdery carbon material is at least one selected from the group consisting of carbon black and active carbon.  
   
   
       10 . The method of manufacturing a non-aqueous electrolyte secondary battery in accordance with  claim 8 , wherein said powdery carbon material has a specific surface area of 50 to 1500 m 2 /g.