In the core shell spinel cathode active material for lithium secondary batteries according to the present invention, the core portion is made of a spinel manganese containing material substituted with fluorine or sulfur, having the 4V grade potential and showing low cost and high output characteristics, and the shell portion, which comes into contact with {HEAD ~ an electrolyte}, is made of a spinel transition metal containing material, having excellent thermal stability and {TAIL ~ cycle life characteristics} and showing low reactivity with the electrolyte 
In the core shell spinel cathode active material for lithium secondary batteries according to the present invention , the core portion is made of a spinel manganese containing material substituted with fluorine or sulfur , having the 4V grade potential and showing low cost and high output characteristics , and the shell portion , which comes into contact with { HEAD ~ an electrolyte } , is made of a spinel transition metal containing material , having excellent thermal stability and { TAIL ~ cycle life characteristics } and showing low reactivity with the electrolyte
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