Study on synthesis of spinel LiNi 0 . 5 Mn 1 . 5 O 4 cathode material and its electrochemical properties by two‐stage roasting

LiNi0.5Mn1.5O4 (LNMO) cathode material is burnt in two-stage roasting process for lithium battery. Carried out X-ray diffraction (XRD), scanner transmission electron microscope (SEM), laser grain fineness distribution and precise measurement of photoelectric catalysis, and qualitatively analyzed the LNMO cathode material. The SEM image shows that the LNMO battery cathode material is combined with μm-level particles (10 μm in diameter). The XRD pattern shows that the structure of the prepared LNMO cathode material belongs to the Fd3m space group. After being burned at 650°C for 8 hours and refrigerated milling, it is burned again at 1000°C for 8 hours. At this time, the LNMO cathode material prepared by quenching has the best photocatalytic properties. In the range of 3.5 to 5.1 V, the original charge-discharge volume of the prepared battery cathode material is shown as 130.3 mAh g−1 at a speed of 1.0 C. After 100 cycles, the sample saves 96.7% (1.0 C) of the original volume. At 1025°C, at different speeds in the discontinuance voltage range of 3.5 to 5.1 V, the charge and discharge quantity of the negative electrode raw materials obtained by individuals can be maintained at about 133.6 (0.2 C), 129.9 (1.0 C), 129 (2.0 C), respectively.