US 9,755,234 B2 · Method for preparing lithium iron phosphate nanopowder

Abstract

The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a triethanolamine solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 bar to 100 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method and a supercritical hydrothermal synthesis method, a reaction may be performed under a relatively lower pressure. When compared to a common glycothermal synthesis method, a lithium iron phosphate nanopowder having effectively controlled particle size and particle size distribution may be easily prepared.

Claims12

Dependent claims

A glycothermal method for preparing a lithium iron phosphate nanopowder, comprising the steps of:

(a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a solvent;
and
(b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 bar to 100 bar,
wherein the solvent is non-aqueous, and the solvent is triethanolamine.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/510,472Filed 9 Oct 2014 · continuation

Priority

KR 10-2013-000303210 Jan 2013

Published

US 2015/0024271 A122 Jan 2015

Granted

5 Sep 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

H01M 4/5825
Of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures,…:…
B82Y 30/00
Nanotechnology for materials or surface science
C01B 25/45
Phosphates: containing plural metal, or metal and ammonium
C01G 49/009
Compounds of iron: compounds containing iron, with or without oxygen or hydrogen, and containing two or more other elements

Method for preparing lithium iron phosphate nanopowder

Life of this patent

Method for preparing lithium iron phosphate nanopowder

Life of this patent

Abstract

Claims12