Electrochemical properties of niobium and phosphate doped spherical Li-rich spinel LiMn2O4 synthesized by ion implantation method

Spherical Li-rich lithium manganese oxide spinel material was synthesized by an ion implanted method assisted by polyalcohol doped with Niobium and Phosphate simultaneously. The prepared Li1.09Mn1.87Nb0.031O3.99(PO4)0.021 delivers a discharge capacity of 119 mAh g−1 at 0.2 C (1 C = 148 mA g−1) and 112.8 mAh g−1 at 10 C, the discharge capacity retention reaches 98% at 1 °C after 50 cycles at 25 °C and 94% at 55 °C.