Nano layered-spinel 0.8Li2MnO3 · 0.2LiMn2O4 as high-performance cathode for Li-ion batteries

Abstract

Abstract The nano layered-spinel 0.8Li2MnO3·0.2LiMn2O4 cathode material has been synthesized by a simple solvothermal method. X-ray diffraction studies show that the as-prepared material has two compositions, including Li2MnO3 and LiMn2O4. Moreover, the surface morphology of the precursor and cathode material were characterized by scanning electron microscopy. Meanwhile, the EDS graph reflects homogeneous mixing of the two compositions due to the novel precursor synthesizing method. Consequently, as a cathode material for LIBs, the resulting nano layered-spinel 0.8Li2MnO3·0.2LiMn2O4 achieves a high discharge capacity of 248 mA h g−1 at 25 mA g−1 and 162 mA h g−1 even at 1250 mA g−1. In addition, the cathode material shows a high reversible capability with 180 mA h g−1 after 50 cycles, which delivers medium cycling performance.