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Title:
LITHIUM ION SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2003/049216
Kind Code:
A1
Abstract:
A lithium ion secondary cell having a positive electrode, a negative electrode and a nonaqueous electrolyte, wherein the positive electrode contains a positive electrode active material and a binder, and the positive electrode active material comprises a lithium−containing composite oxide represented by a chemical formula: Lia(Co1−x−yMg x My)bOc , wherein M represents at least one selected from among Ni, Mn and Al, 0 ≤ a ≤ 1.05, 0.005 ≤ x ≤ 0.025, 0 ≤ y ≤ 0.25, 0.85 ≤ b ≤ 1.1, and 1.8 ≤ c ≤ 2.1.

Inventors:
OKOCHI MASAYA (JP)
KAWATATE YUTAKA (JP)
TANAKA RYOICHI (JP)
INOUE KAORU (JP)
Application Number:
PCT/JP2002/012283
Publication Date:
June 12, 2003
Filing Date:
November 25, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OKOCHI MASAYA (JP)
KAWATATE YUTAKA (JP)
TANAKA RYOICHI (JP)
INOUE KAORU (JP)
International Classes:
H01M10/05; C01G51/00; C01G53/00; H01M4/131; H01M4/36; H01M4/505; H01M4/525; H01M4/587; H01M10/0525; H01M10/0569; (IPC1-7): H01M4/58; H01M4/02; H01M4/62; H01M10/40
Foreign References:
JP2001319652A2001-11-16
EP0997960A22000-05-03
JPH05307959A1993-11-19
JPH05217604A1993-08-27
JPH05121066A1993-05-18
JP2002270176A2002-09-20
JP2002231246A2002-08-16
JP2002198051A2002-07-12
JPH101316A1998-01-06
JPH05242891A1993-09-21
JPH06168722A1994-06-14
Attorney, Agent or Firm:
Ishii, Kazuo (Kitahama 2-chome Chuo-ku Osaka-shi, Osaka, JP)
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