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