METHOD FOR PREPARING LITHIUM METAL PHOSPHOR OXIDE

Title:

METHOD FOR PREPARING LITHIUM METAL PHOSPHOR OXIDE

Document Type and Number:

WIPO Patent Application WO/2014/025125

Kind Code:

A1

Abstract:

The present invention relates to a method for preparing a lithium metal phosphor oxide, the method comprising the steps of: mixing an iron salt solution and a phosphate solution in a reactor; applying a shearing force to the mixed solution inside the reactor during the mixing step, and thus forming a suspension containing nano-sized iron phosphate precipitate particles; obtaining nano-sized iron phosphate particles from the suspension; and mixing the iron phosphate with a lithium raw material, and firing, wherein the lithium metal phosphor oxide according to the present invention has the formula of LiMn FePO4, where M is selected from the group consisting of Ni, Co, Mn, Cr, Zr, Nb, Cu, V, Ti, Zn, Al, Ga, and Mg, and n is in the range of 0 to 1. According to the present invention, calcination is conducted at a lower temperature compared to other existing methods, thereby reducing processing costs, and the lithium metal phosphor oxide prepared by the method according to the present invention has an olivine structure.

Inventors:

SONG HYUN A (KR)
CHANG DONG GYU (KR)
YANG WOO YOUNG (KR)

Application Number:

PCT/KR2013/004162

Publication Date:

February 13, 2014

Filing Date:

May 10, 2013

Export Citation:

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Assignee:

SAMSUNG FINE CHEMICALS CO LTD (KR)

International Classes:

C01D15/00; B01J6/00; B01J19/24; C01G49/00

Domestic Patent References:

WO2011035235A1

2011-03-24

Foreign References:

KR20100117895A	2010-11-04
KR20080100031A	2008-11-14
KR20100139084A	2010-12-31
KR20080017289A	2008-02-26
US20110017947A1	2011-01-27

Other References: