Method for preparing positive electrode active material precursor and positive electrode material for lithium secondary battery having concentration-gradient layer using batch reactor, and positive electrode active material precursor and positive electrode material for lithium secondary battery prepared by the method
US9923190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jan 19, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for preparing a positive electrode active material precursor and a positive electrode material for a lithium secondary battery having a concentration-gradient layer using a batch reactor, and to a positive electrode active material precursor and a positive electrode material for a lithium secondary battery prepared by the method. The method for preparing a positive electrode active material precursor and a positive electrode active material for a lithium secondary battery having a concentration-gradient layer using a batch reactor involves supplying a predetermined amount of a chelating agent into the batch reactor, and simultaneously supplying transition metals while continuously adjusting the concentration of the transition metals such that the concentration-gradient layer can be formed from a core to a shell of the positive electrode active material in a more economically advantageous and stable manner, and at the same time a positive electrode active material having an elongated lifespan and improved thermal stability can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.