| 摘要 |
To provide trimanganese tetraoxide which has high reactivity with a lithium compound and is excellent in the handling efficiency, and which is suitable as a manganese material of a lithium manganese oxide, and its production process. Trimanganese tetraoxide particles comprising trimanganese tetraoxide primary particles having an average primary particle size of at most 2 µm agglomerated, the pore volume of pores being at least 0.4 mL/g. The most frequent pores are preferably pores having a diameter of at most 5 µm. The trimanganese tetraoxide particles can be obtained by a process for producing trimanganese tetraoxide particles, which comprises a crystallization step of directly crystallizing trimanganese tetraoxide from a manganese salt aqueous solution, wherein in the crystallization step, the manganese salt aqueous solution and an alkali aqueous solution are mixed so that the oxidation-reduction potential is at least 0 mV and OH - /Mn 2+ (mol/mol) is at most 0.55, to obtain a slurry, and the solid content concentration of the slurry is adjusted to be at most 2 wt%. |
