LITHIUM AND MANGANESE RICH POSITIVE ACTIVE MATERIAL COMPOSITIONS

A positive electrode active material for lithium-ion batteries may include a compound represented by the general formula LiMnNiNMO, wherein a ranges from 1.02 to 1.08, b ranges from 0.51 to 0.53, c ranges from 0.40 to 0.47, x ranges from 0 to 0.1, a+b ranges from 0 to 0.05, N=Co, Cr, or a combination thereof, and M=W, Ta, V, or a combination thereof.