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Title:
正極活物質の製造方法及び非水電解質電池の製造方法
Document Type and Number:
Japanese Patent JP4491946
Kind Code:
B2
Abstract:
A LiFePO4 carbon composite material is to be synthesized in a single phase satisfactorily to achieve superior cell characteristics. In preparing a cathode active material, a starting material for synthesis of a compound represented by the general formula LixFePO4, where 0 < x ≤ 1, is mixed, milled and sintered and a carbon material is added to the resulting mass at an optional time point in the course of mixing, milling and sintering. Li3PO4, Fe3(PO4)2 or its hydrates Fe3(PO4)2 .nH2O, where n denotes the number of hydrates, are used as the starting material for synthesis of LixFePO4. The particle size distribution of particles of the starting material for synthesis following the milling with the particle size not less than 3 mu m is set to 2.2% or less in terms of the volumetric integration frequency.

Inventors:
Hosoya Mamoru
Kimio Takahashi
Fukushima string
Application Number:
JP2000301403A
Publication Date:
June 30, 2010
Filing Date:
September 29, 2000
Export Citation:
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Assignee:
ソニー株式会社
International Classes:
C01B25/45; H01M4/58; C01B31/02; H01M10/05; H01M10/052; H01M10/0565; H01M10/0566
Domestic Patent References:
JP2003520405A
JP2004509447A
JP2002015735A
JP2001250555A
JP2001196059A
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga