Nano-Crystalline Li_1.2Mn_0.6Ni_0.2O₂ Prepared via Amorphous Complex Precursor and Its Electrochemical Performances as Cathode Material for Lithium-Ion Batteries.

ABSTRACT: An amorphous complex precursor with uniform Mn/Ni cation distribution is attempted for preparing a nano-structured layered Li-rich oxide (Li_1.2Mn_0.6Ni_0.2O₂)cathode material, using diethylenetriaminepentaacetic acid (DTPA) as a chelating agent. The materials are characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical tests. The crystal structure of Li-rich materials is found to be closely related to synthesis temperature. As-obtained nano materials sintered at 850 °C for 10 h show an average size of 200 nm with a single crystal phase and good crystallinity. At a current density of 20 mA·g^-1, the specific discharge capacity reaches 221 mAh·g^-1 for th

SUBMITTER: He X 

PROVIDER: S-EPMC5509272 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature