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    Method for predicting discharge capacity and operating voltage of lithium rechargeable battery using lithium manganese spinel cathode material
    6.
    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.

    LITHIUM SULFIDE-CARBON COMPLEX, PROCESS FOR PRODUCING THE COMPLEX, AND LITHIUM ION SECONDARY BATTERY UTILIZING THE COMPLEX
    7.
    发明申请
    LITHIUM SULFIDE-CARBON COMPLEX, PROCESS FOR PRODUCING THE COMPLEX, AND LITHIUM ION SECONDARY BATTERY UTILIZING THE COMPLEX 有权
    复合硫酸锂复合物，复合物的制造方法以及利用复合物的锂离子二次电池

    公开(公告)号：US20110171537A1

    公开(公告)日：2011-07-14

    申请号：US13120237

    申请日：2009-08-24

    申请人： Tomonari Takeuchi ,  Hikari Sakaebe ,  Tetsuo Sakai ,  Kuniaki Tatsumi ,  Hiroshi Senoh ,  Hiroyuki Kageyama ,  Mitsuharu Tabuchi

    发明人： Tomonari Takeuchi ,  Hikari Sakaebe ,  Tetsuo Sakai ,  Kuniaki Tatsumi ,  Hiroshi Senoh ,  Hiroyuki Kageyama ,  Mitsuharu Tabuchi

    IPC分类号： H01M10/0562 ,  H01M4/86 ,  H05B6/02

    CPC分类号： H01M4/136 ,  C01B17/22 ,  C01B32/00 ,  C01P2002/72 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/043 ,  H01M4/0438 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/1397 ,  H01M4/581 ,  H01M4/587 ,  Y02P70/54

    摘要： The present invention provides a process for producing a lithium sulfide-carbon composite, the process comprising placing a mixture of lithium sulfide and a carbon material having a specific surface area of 60 m2/g or more in an electrically-conductive mold in a non-oxidizing atmosphere, and applying a pulsed direct current to the mold while pressurizing the mixture in a non-oxidizing atmosphere, thereby subjecting the lithium sulfide and the carbon material to heating reaction; and a lithium sulfide-carbon composite obtained by this process, the composite having a carbon content of 15 to 70 weight %, and a tap density of 0.4 g/cm3 or more when the carbon content is 30 weight % or more, or a tap density of 0.5 g/cm3 or more when the carbon content is less than 30 weight %. The present invention can improve the electronic conductivity of lithium sulfide, which is expected to be put into practical use as a high-capacity positive electrode active material, so as to further enhance the performance of lithium sulfide as a positive electrode active material for lithium ion secondary batteries.

    摘要翻译： 本发明提供一种硫化锂 - 碳复合材料的制造方法，其特征在于，在非导电性模具中将硫化锂和比表面积为60m 2 / g以上的碳材料的混合物， 氧化气氛，并且在非氧化性气氛中对混合物加压的同时向模具施加脉冲直流电流，从而使硫化锂和碳材料进行加热反应; 和通过该方法获得的硫化锂 - 碳复合材料，当碳含量为30重量％以上时，复合材料的碳含量为15〜70重量％，振实密度为0.4g / cm 3以上， 当碳含量小于30重量％时，密度为0.5g / cm 3以上。 本发明可以提高预期作为大容量正极活性物质实际使用的硫化锂的电子导电性，从而进一步提高作为锂离子的正极活性物质的硫化锂的性能 二次电池