METHOD OF MANUFACTURING CHEMICAL MANGANESE DIOXIDE FROM TERNARY SYSTEM CATHODE ACTIVE MATERIAL, CHEMICAL MANGANESE DIOXIDE MANUFACTURED BY THIS METHOD, AND SECONDARY BATTERY INCLUDING CHEMICAL MANGANESE DIOXIDE

Title:

Document Type and Number:

Japanese Patent JP2012204343

Kind Code:

A

Abstract:

To provide a method of manufacturing chemical manganese dioxide by selectively precipitating only Mn by use of oxidant from a sulfur reducing leaching solution, for selectively separating the Mn from a ternary system cathode active material (Li(Ni_1/3Mn_1/3Co_1/3)O₂) as a cathode active material of a lithium ion battery to be used for a mobile phone or an electric car.

The method of manufacturing chemical manganese dioxide from a ternary system cathode active material of the present invention includes: (a) a first leaching step of leaching ternary system cathode active material powder with a mixture of sulfur and a reducing agent; (b) a second leaching step of successively leaching the first leaching solution; and (c) a step of adding Na₂S₂O₈ to the second leaching solution, and selectively precipitating Mn to manufacture chemical manganese dioxide.

Inventors:

SHIN NOBUAKI
KANG JIN-GU
SHU SEIKO
CHANG HAN-KWON

Application Number:

JP2012064061A

Publication Date:

October 22, 2012

Filing Date:

March 21, 2012

Export Citation:

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Assignee:

KOREA INST GEOSCIENCE & MINERA

International Classes:

H01M4/50; C01G45/02; H01M6/52; H01M10/54

Domestic Patent References:

JPH1154159A	1999-02-26
JPH03254065A	1991-11-13
JPH08503918A	1996-04-30
JP2007519210A	2007-07-12
JPH1154159A	1999-02-26
JPH03254065A	1991-11-13

Foreign References:

KR101011260B1	2011-01-26
KR101011260B1	2011-01-26

Attorney, Agent or Firm:

Sakaki Morishita

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