MnO2 nanowires as precursor synthesis of lithium-rich cathode material with enhanced electrochemical performances

Abstract

Lithium-rich cathode material Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion battery has been successfully synthesized through combination of co-precipitation and α-MnO2 nanowires as precursor. The X-ray diffraction (XRD) results reveal that the as-obtained material can exhibit well-layered structure and crystallization. The as-prepared sample has been investigated by the scanning electron microscope (SEM) and transmission electron microscopy (TEM). The possible reason for the formation of polyhedron has been presented. The results of electrochemical performance reveal that the as-prepared sample with combination of two methods can provide an initial discharge specific capacity of 247.5 mAh g−1 at 0.2 C within a potential range of 2.0–4.8 V, and this material can also deliver a discharge specific capacity of 181.8 mAh g−1 at 2 C with 97.8% capacity retention after 100 cycles. Hence, it is proposed that combination of two methods might be a promising strategy to prepare electrode cathode materials with improved performance.