LITHIUM-MANGANESE COMPOSITE OXIDE AND SECONDARY BATTERY

摘要

To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics.

主权项

1. An active material particle comprising:
a first region; and a second region, wherein each of the first region and the second region comprises lithium manganese oxide, wherein a valence number of manganese in the first region is lower than a valence number of manganese in the second region, wherein the valence number of manganese in the first region is higher than or equal to 1.5 and lower than or equal to 5, wherein the valence number of manganese in the second region is higher than or equal to 2, and wherein each of the valence number of manganese in the first region and the valence number of manganese in the second region is obtained by electron energy loss spectroscopy.