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    Method for predicting discharge capacity and operating voltage of lithium rechargeable battery using lithium manganese spinel cathode material
    1.
    发明授权
    Method for predicting discharge capacity and operating voltage of lithium rechargeable battery using lithium manganese spinel cathode material 失效

    公开(公告)号：US6033798A

    公开(公告)日：2000-03-07

    申请号：US769526

    申请日：1996-12-19

    申请人： Mitsuharu Tabuchi ,  Kazuaki Ado ,  Hiroyuki Kageyama ,  Osamu Nakamura

    发明人： Mitsuharu Tabuchi ,  Kazuaki Ado ,  Hiroyuki Kageyama ,  Osamu Nakamura

    IPC分类号： G01R31/36 ,  C01G45/00 ,  C01G45/12 ,  G01N27/72 ,  H01M4/505 ,  H01M10/05 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

    CPC分类号： H01M10/42 ,  C01G45/1242 ,  C01G45/1292 ,  G01N27/72 ,  C01P2002/32 ,  C01P2006/40 ,  C01P2006/42

    摘要： A method of determining the charge and/or discharge capacities of non-aqueous batteries with an operating voltage of about 4 volts, is provided including determining an inverse molar susceptibility value at each of a plurality of different temperatures for a plurality of lithium manganese spinel oxide cathode materials having different respective Mn valencies; plotting the inverse molar susceptibility values against temperatures for each of the plurality of lithium manganese spinel oxide cathode materials; determining values of at least one of two paramagnetic parameters, Weiss temperature and effective magnetic moment, by obtaining the temperature dependence of the above inverse molar susceptibility from a plot derived from the Curie-Weiss law, the Weiss temperature corresponding to a temperature value extrapolated to a zero point of the inverse molar susceptibility and the effective magnetic moment being obtainable from the gradient value of the plot; producing plural rechargeable lithium batteries in which lithium manganese spinel oxides with well-defined Mn valencies are used as cathode materials, and finding at least one of the charge or discharge capacities around 4V for each of the batteries; providing at least one correlation curve between the above-found charge and/or discharge capacities and the above-found at least one paramagnetic parameter value; and obtaining charge and/or discharge capacities for a rechargeable lithium battery containing a lithium manganese spinel oxide whose charge and/or discharge capacities are being sought from the at lest one determined paramagnetic parameter value using the at least one correlation curve. A method of determining the charge and/or discharge capacities of non-aqueous batteries with an operating voltage of about 4 volts, is also provided which includes determining a spontaneous magnetization value for each of a plurality of lithium manganese spinel oxide cathode materials having a different respective Mn valency by determining a magnetization value of each of a plurality of magnetic fields at a constant temperature to obtain and thereafter use a correlation curve.