Process for manufacturing lithium titanium oxides
US9966599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2014 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Nov 21, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is lithium titanate that is readily pulverized, and readily dispersed in a binding agent. The lithium titanate is characterized in that the value of a degree of pulverization Zd representing the ratio of the 50% cumulative diameter pre- and post-pulverization is 2 or greater. The lithium titanate is produced by the following steps (1)-(3). (1) a step in which titanyl sulfate or titanium sulfate is thermally hydrolyzed to produce metatitanic acid; (2) a step in which a slurry containing the metatitanic acid is prepared, and the slurry, subsequent to neutralization to bring the pH to 6.0-9.0, undergoes solid-liquid separation, to produce a metatitanic acid-containing titanium starting material having a BET specific surface area of 100-400 m2/g, and in which the sulfuric acid (SO4) content is 0.01-2.0 mass % with respect to the amount of metatitanic acid, on a TiO2-converted basis; and (3) a step in which the titanium starting material and a lithium compound are mixed and baked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.