Improvement of the rate property of LiMn1.45Ni0.45Cr0.1O4 cathode for Li-ion batteries

Abstract MnO 2 nanowires were used to synthesize the spinel-type LiMn 1.45 Ni 0.45 Cr 0.1 O 4 (Cr–LMN) materials by solid-state impregnation. Structural analyses revealed that the final product consisted of sub-micrometric Cr–LMN particles of octahedral shape well-crystallized in the cation-disordered phase. This powder delivered a specific capacity ~ 127 mAh g − 1 up to 2C rate. At 5C rate, the capacity was still 115 mAh g − 1 without significant capacity loss in 25 cycles. The remarkable improvement in electrochemical properties with respect to prior works suggests that the sub-micrometric Cr–LMN prepared by this synthesis process is a promising cathode material for high power and long-cycle lithium-ion batteries.