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    12.
    发明专利
    未知

    公开(公告)号：DE69205542D1

    公开(公告)日：1995-11-23

    申请号：DE69205542

    申请日：1992-04-24

    Applicant: SONY CORP

    Inventor： YAMAMOTO YOSHIKATSU ,  FUJITA SHIGERU ,  KATO HISAYUKI

    IPC: H01M2/34 ,  H01M4/52 ,  H01M4/525 ,  H01M10/052 ,  H01M10/36 ,  H01M10/42 ,  H01M10/40 ,  H01M4/58

    Abstract: A nonaqueous electrolyte secondary battery in which, using Li x MO (where M is at least one of transition metals, preferably Co or Ni, and 0.05 & X & 1.10) as a positive electrode active material, the charge and discharge of the battery are performed by doping and dedoping lithium. The battery is provided with a means for shutting off current, which operates with the increase of the pressure of the inside of the battery. The means for shutting off current is operated surely by adding lithium carbonate to the positive electrode active material and by covering a part of the surface of the positive electrode with lithium carbonate. The quantity of lithium carbonate is 0.5-15 wt %, and the specific surface area is preferably 0.1 m /g or more.

    Positive electrode active material and nonaqueous electrolyte secondary battery
    18.
    发明专利
    Positive electrode active material and nonaqueous electrolyte secondary battery 审中-公开

    公开(公告)号：JP2004111076A

    公开(公告)日：2004-04-08

    申请号：JP2002268357

    申请日：2002-09-13

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： SATO TAKASHI ,  YAMAMOTO YOSHIKATSU ,  HOSOYA YOSUKE

    IPC: H01M10/05 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/02 ,  H01M10/40

    CPC classification number: Y02E60/122

    Abstract: PROBLEM TO BE SOLVED: To provide a positive electrode activve material by which a nonaqueous electrolyte lithium ion secondary battery with high capacity and excellent cycle property can be manufactured, and to provide a nonaqueous electrolyte lithium ion secondary battery using the same.
    SOLUTION: The positive electrode active material contains a lithium compound oxide having electron conductivity σ satisfying the relation; 10
    -4 ≤σ≤10
    -1 S/cm, expressed by general formula; Li
    x Ni
    (1-Y-Z) Co
    Y Mn
    Z A
    a O
    2 (1) (in the formula, A represents an element like Fe, V, Cr, Mn, Ti, Mg, Al, B, or Ca, and X, Y, Z satisfy the relations 0.05≤X≤1.10, 0.10≤Y+Z≤0.70, 0.05≤Z≤0.40, 0≤a≤0.1 respectively). The nonaqueous electrolyte lithium ion secondary battery comprises a positive electrode and a negative electrode containing positive electrode active material and negative electrode active material respectively which can dope and dedope lithium ions and a nonaqueous electrolyte with an electrolyte dispersed in a nouaqueous medium, of which, the positive electrode active material contains the lithium compound oxide.
    COPYRIGHT: (C)2004,JPO

    Nonaqueous electrolyte liquid secondary battery
    19.
    发明专利
    Nonaqueous electrolyte liquid secondary battery 审中-公开

    公开(公告)号：JP2004031131A

    公开(公告)日：2004-01-29

    申请号：JP2002185952

    申请日：2002-06-26

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： HATAKE SHINJI ,  OKAE KATSUYA ,  YAMAMOTO YOSHIKATSU

    IPC: H01M10/05 ,  H01M4/58 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/40 ,  H01M4/02

    CPC classification number: Y02P70/54

    Abstract: PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte liquid secondary battery with a large capacity and excellent high-temperature stability, keeping a capacity recovering property even after preservation at a high temperature.
    SOLUTION: The nonaqueous electrolyte liquid secondary battery 1 comprises a positive electrode 2 having a positive electrode activator made of a compound expressed by a general formula; Li
    x Fe
    1-y M
    y PO
    4 , on condition that M represents at least one or more of elements chosen from Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca, Sr, 0.9 1 SO
    2 )(R
    2 SO
    2 )NLi, on condition that R
    1 represents C
    m F
    2m+1 , R
    2 represents C
    n F2
    n+1 , m and n are integer of 1 to 4.
    COPYRIGHT: (C)2004,JPO

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