Trimanganese tetraoxide and its production process
US9487883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Apr 17, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Trimanganese tetraoxide has high reactivity with a lithium compound, is excellent in handling efficiency, and is suitable as a manganese material of a lithium manganese oxide, and its production process. Trimanganese tetraoxide particles including 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 producing trimanganese tetraoxide particles, which includes directly crystallizing trimanganese tetraoxide from a manganese salt aqueous solution, wherein 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−/Mn2+ (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 %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.