METHOD OF DISPOSING OF LITHIUM BATTERY

Title:

METHOD OF DISPOSING OF LITHIUM BATTERY

Document Type and Number:

WIPO Patent Application WO/2005/124921

Kind Code:

A1

Abstract:

A method of recovering valuable materials from lithium batteries wherein a lithium/transition metal composite oxide is used as a positive electrode active material. In this disposal method, a sheeted positive electrode having a positive electrode active material disposed on a positive electrode collector is immersed in an oxalic acid solution. By virtue of this oxalic acid treatment (step 240), any lithium component contained in the positive electrode active material can be leached into the oxalic acid solution. Using oxygen gas produced by a reaction between the positive electrode active material and oxalic acid, attachments, such as the positive electrode active material, can be self-detached from the positive electrode collector. The transition metal component contained in the positive electrode active material is converted by the oxalic acid treatment to insoluble transition metal compounds (oxalate, oxide, etc.). Thus, through simple means such as filtration (step 244), the leached lithium component can be easily separated from the insoluble transition metal component.

Inventors:

UCHIDA YOSHIMASA (JP)
HIRATA YOSHIMI (JP)
ARIMURA KAZUTAKA (JP)
YAMASAKI HIROSHI (JP)

Application Number:

PCT/JP2005/011209

Publication Date:

December 29, 2005

Filing Date:

June 14, 2005

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
UCHIDA YOSHIMASA (JP)
HIRATA YOSHIMI (JP)
ARIMURA KAZUTAKA (JP)
YAMASAKI HIROSHI (JP)

International Classes:

C22B3/16; C22B3/44; C22B7/00; C22B23/00; C22B26/12; H01M6/52; H01M10/54; H01M10/38; (IPC1-7): H01M10/54; C22B3/44; H01M6/52

Foreign References:

JPH11293356A	1999-10-26
JPH10255862A	1998-09-25
JPH1197076A	1999-04-09
JPH09111360A	1997-04-28
JPH09195071A	1997-07-29
JP2002198103A	2002-07-12
JPH0116020A

Other References: