Spherical lithium-rich layered Li1.13[Mn0.534Ni0.233Co0.233]0.87O2 with concentration-gradient outer layer as high-performance cathodes for lithium ion batteries

► Spherical Li1.13[Mn0.534Ni0.233Co0.233]0.87O2 was synthesized by co-precipitation. ► The material comprised a core encapsulated with concentration-gradient outer layer. ► The concentration of Mn increased gradually within the outer layer of the material. ► The material showed high performance due to its concentration-gradient architecture.