METHOD OF PRODUCTION OF LiM3+O2 OR LiMn2O4 AND LiNi3+O2 AS POSITIVE POLE MATERIAL OF SECONDARY CELL

Title:

METHOD OF PRODUCTION OF LiM3+O2 OR LiMn2O4 AND LiNi3+O2 AS POSITIVE POLE MATERIAL OF SECONDARY CELL

Document Type and Number:

WIPO Patent Application WO/1994/022767

Kind Code:

A1

Abstract:

A basic metal salt expressed by the general formula given below and an alkaline water-soluble lithium compound are reacted in an aqueous medium at a molar ratio of Li/M2+ of from 0.3 to 1.3: M2+(OH)2-nx(An-1)x m H2O where M2+ is at least one member selected from Ni2+, Co2+ and Mn2+, An-1 is an anion having n valence (n = 1 to 3) such as NO3-, Cl-, CH3COO-, and CO32-, and x and m are positive numbers satisfying the relation 0.03 x 0.3 and 0 m 2. The resulting slurry is dried and is then sintered at not lower than about 500 �C in an oxidizing atmosphere. This invention can mass-produce industrially LiM3+O2 or LiMn2O4 having high purity and high crystallinity. LiNi3+O2 thus produced exhibits excellent charge/discharge characteristics as a positive pole active material of a secondary cell.

Inventors:

UEDA MASAMI (JP)
MURAKAMI TATSUO (JP)

Application Number:

PCT/JP1994/000530

Publication Date:

October 13, 1994

Filing Date:

March 31, 1994

Export Citation:

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Assignee:

FUJI CHEM IND CO LTD (JP)
UEDA MASAMI (JP)
MURAKAMI TATSUO (JP)

International Classes:

C01D15/02; C01G45/00; C01G51/00; C01G53/00; C01G53/04; H01M4/505; H01M4/525; H01M10/05; (IPC1-7): C01G53/00

Foreign References:

JPS63210028A	1988-08-31
JPS6359507B2	1988-11-18
JPH0367464A	1991-03-22

Other References: