| abstract |
Provide: For 5V class spinel, spinel-type lithium-manganese-containing composite oxide can suppress gas generation and improve power characteristics and life characteristics. A spinel-type lithium-containing manganese composite oxide is proposed, which contains at least Li, Mn, O, and two or more elements other than these, and has a potential of 4.5 V or more when metal Li is used as a standard potential A spinel-type lithium-manganese-containing composite oxide with a high working potential, D50 is 0.5 μm to 9 μm, (|mode particle size-D50|/mode particle size)×100 is 0 to 25%, (|moderate particle size The value of number particle diameter-D10|/mode particle diameter)×100 is 20 to 58%, and the average primary particle diameter/D50 calculated from the average primary particle diameter calculated from the SEM image and the aforementioned D50 is 0.20 to 0.99, the primary The particles are polycrystalline. |