Methods for the colloidal synthesis of lithium iron phosphate
US9401507B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2013 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Aug 7, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods for producing lithium iron phosphate or lithium manganese phosphate or lithium iron manganese phosphate, by colloidal synthesis are provided. Such methods include the operation of reacting a lithium salt, an iron(II) halide (and/or a manganese(II) halide) and a phosphorus compound, which, under the reaction conditions, is capable of releasing the phosphate ion, in the presence of an organic surfactant or a mixture of organic surfactants including an alkylamine or alkenylamine, in which the surfactant or mixture of surfactants is capable of dissolving the lithium salt and the iron halide (and/or the manganese halide), where used, in an organic solvent, which is liquid at room temperature, in which the surfactant or mixture of surfactants is soluble, the reaction being performed at a temperature not lower than 250° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.