At the same time, the obtained positive electrode material P1 was subjected to extreme water washing, as well as SEM and XRD testing. The results were shown in FIG. 1 and FIG. 2, respectively.
FIG. 1 was a schematic view showing SEM images of the positive electrode material P1 obtained in Example 1-1 before and after the extreme water washing, wherein A was the SEM image before the extreme water washing and B was the SEM image after the extreme water washing. As shown in FIG. 1, there was little difference in the SEM images of the positive electrode material P1 in Example 1-1 before and after extreme water washing, indicating that the extreme water washing did not have a significant impact on the structure of the positive electrode material P1 in Example 1-1.
FIG. 2 was a schematic view showing XRD patterns of the positive electrode material P1 obtained in Example 1-1 before and after the extreme water washing, wherein A was the XRD pattern before the extreme water washing and B was the XRD pattern after the extreme water washing. As shown in FIG. 2, the XRD patterns of the positive electrode material P1 obtained in Example 1-1 before and after extreme water washing were basically the same, indicating that the extreme water washing did not have a significant impact on the structure of the positive electrode material P1 in Example 1-1. It was consistent with the results obtained from SEM images.
