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|1. (WO2017150504) SPINEL-TYPE LITHIUM-MANGANESE-CONTAINING COMPLEX OXIDE|
|Applicants:||MITSUI MINING & SMELTING CO.,LTD.
|Title:||SPINEL-TYPE LITHIUM-MANGANESE-CONTAINING COMPLEX OXIDE|
Provided is a spinel-type lithium-manganese-containing complex oxide that is related to a 5V-class spinel, and with which output characteristics and longevity characteristics can be improved while suppressing the production of gas. Proposed is a spinel-type lithium-manganese-containing complex oxide comprising at least Li, Mn, O, and at least two types of elements other than the above, and having an operating potential of at least 4.5 V with respect to a metal Li reference potential, wherein: D50 is from 0.5 µm to 9 µm; the value of (|mode diameter - D50|/mode diameter) × 100 is from 0 to 25%; the value of (|mode diameter - D10|/mode diameter) × 100 is from 20 to 58%; the ratio of the average primary particle diameter to said D50, as calculated from the average primary particle diameter calculated from a SEM image and said D50, is from 0.20 to 0.99; and the primary particles are polycrystalline.