| abstract |
To provide a thick sintered body of lithium complex oxide capable of exhibiting excellent performance such as rapid charge performance when incorporated as a positive electrode in a lithium secondary battery while having high energy density. provide. The sintered lithium composite oxide plate of the present invention has a structure in which a plurality of primary particles having a layered rock salt structure are combined, and the porosity is 3 to 40%, and the average air content is 3 to 40%. The primary particle diameter is 15 μm or less, the open pore ratio is 70% or more, the thickness is 15 to 200 μm, and the average primary particle diameter of the plurality of primary particles is 20 μm or less, and the plurality of primary particles The average inclination angle is more than 0 ° and not more than 30 °, and the average inclination angle is an average value of angles formed by the (003) planes of the plurality of primary particles and the plate surface of the lithium complex oxide sintered plate. [Selected figure] Figure 1 |