Electrospun Li2MnO3-modified Li1.2NixCo0.1Mn0.9-xO2 nanofibers: Synthesis and enhanced electrochemical performance for lithium-ion batteries

The Li 2 MnO 3 -modified Li 1.2 Ni x Co 0.1 Mn 0.9-x O 2 (x = 0.2, 0.45, 0.7) as cathode materials for lithium-ion batteries have been successfully synthesized by a simple electrospinning process. The structure, morphology and electrochemical performances of the resulting products are studied systematically. The as-prepared Li 2 MnO 3 -modified Li 1.2 Ni x Co 0.1 Mn 0.9-x O 2 (x = 0.2, 0.45, 0.7) with a diameter of 200-300 nm has an initial discharge capacity of 168.740 mAh·g −1 , coulombic efficiency of 99.6% and a reversible capacity as high as 139.016 mAh·g −1 after 200 cycles at a current rate of 0.2 C. The excellent electrochemical performances of which are attributed to the stabilization of Li 2 MnO 3 structure, the role of Li 2 MnO 3 is contribute extra lithium to the reversible capacity and to facilitate Li + transport through the structure.