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    • 17. 发明授权
    • Positive electrode active material and its manufacturing method, positive electrode for lithium secondary cell using same, and lithium secondary cell
    • 正极活性物质及其制造方法,使用其的锂二次电池用正极和锂二次电池
    • US08153295B2
    • 2012-04-10
    • US10564742
    • 2004-07-13
    • Daisuke EndoAkihiro FujiiRyuji ShiozakiTokuo InamasuHiroe NakagawaToshiyuki Nukuda
    • Daisuke EndoAkihiro FujiiRyuji ShiozakiTokuo InamasuHiroe NakagawaToshiyuki Nukuda
    • H01M4/13
    • H01M4/525H01M4/485H01M4/505
    • A positive active material is provided which can inhibit side reactions between the positive electrode and an electrolyte even at a high potential and which, when applied to a battery, can improve charge/discharge cycle performance without impairing battery performances even in storage in a charged state. Also provided are: a process for producing the active material; a positive electrode for lithium secondary batteries which employs the active material; and a lithium secondary battery which has improved charge/discharge cycle performance while retaining intact battery performances even after storage in a charged state and which can exhibit excellent charge/discharge cycle performance even when used at a high upper-limit voltage. The positive active material comprises: base particles able to dope and release lithium ions; and an element in Group 3 of the periodic table present on at least part of that part of the base particles which is able to come into contact with an electrolyte. It is produced by, e.g., a process which comprises: producing base particles containing lithium and able to dope and release lithium ions; and then imparting an element in Group 3 of the periodic table to the base particles so that the element can be present on at least part of that part of the base particles which is able to come into contact with an electrolyte.
    • 提供一种正极活性物质,即使在高电位下也可以抑制正电极和电解质之间的副反应,并且当应用于电池时,即使在带电状态下的存储中也可以改善充电/放电循环性能而不损害电池性能 。 还提供了:生产活性材料的方法; 使用活性物质的锂二次电池用正极; 以及锂二次电池,即使在充电状态下保存后也能够保持完整的电池性能而具有改善的充放电循环性能,并且即使在高上限电压下使用也能表现出优异的充放电循环性能。 正极活性物质包括:能够掺杂和释放锂离子的基础颗粒; 并且周期表的组3中的元素存在于能够与电解质接触的基础颗粒的该部分的至少一部分上。 它通过例如包括:生产含锂的碱性颗粒并能够掺杂和释放锂离子的方法生产; 然后将元素在元素周期表的第3组中赋予基础颗粒,使得元素可以存在于能够与电解质接触的基础颗粒的那部分的至少一部分上。
    • 19. 发明申请
    • Positive electrode active material and its manufacturing method, positive electrode for lithium secondary cell using same, and lithium secondary cell
    • 正极活性物质及其制造方法,使用其的锂二次电池用正极和锂二次电池
    • US20060177739A1
    • 2006-08-10
    • US10564742
    • 2004-07-13
    • Daisuke EndoAkihiro FujiiRyuji ShiozakiTokuo InamasuHiroe NakagawaToshiyuki Nukuda
    • Daisuke EndoAkihiro FujiiRyuji ShiozakiTokuo InamasuHiroe NakagawaToshiyuki Nukuda
    • H01M4/58H01M4/52H01M4/50
    • H01M4/525H01M4/485H01M4/505
    • A positive active material is provided which can inhibit side reactions between the positive electrode and an electrolyte even at a high potential and which, when applied to a battery, can improve charge/discharge cycle performance without impairing battery performances even in storage in a charged state. Also provided are: a process for producing the active material; a positive electrode for lithium secondary batteries which employs the active material; and a lithium secondary battery which has improved charge/discharge cycle performance while retaining intact battery performances even after storage in a charged state and which can exhibit excellent charge/discharge cycle performance even when used at a high upper-limit voltage. The positive active material comprises: base particles able to dope and release lithium ions; and an element in Group 3 of the periodic table present on at least part of that part of the base particles which is able to come into contact with an electrolyte. It is produced by, e.g., a process which comprises: producing base particles containing lithium and able to dope and release lithium ions; and then imparting an element in Group 3 of the periodic table to the base particles so that the element can be present on at least part of that part of the base particles which is able to come into contact with an electrolyte.
    • 提供一种正极活性物质,即使在高电位下也可以抑制正电极和电解质之间的副反应,并且当应用于电池时,即使在带电状态下的存储中也可以改善充电/放电循环性能而不损害电池性能 。 还提供了:生产活性材料的方法; 使用活性物质的锂二次电池用正极; 以及锂二次电池,即使在充电状态下保存后也能够保持完整的电池性能而具有改善的充放电循环性能,并且即使在高上限电压下使用也能表现出优异的充放电循环性能。 正极活性物质包括:能够掺杂和释放锂离子的基础颗粒; 并且周期表的组3中的元素存在于能够与电解质接触的基础颗粒的该部分的至少一部分上。 它通过例如包括:生产含锂的碱性颗粒并能够掺杂和释放锂离子的方法生产; 然后将元素在元素周期表的第3组中赋予基础颗粒,使得元素可以存在于能够与电解质接触的基础颗粒的那部分的至少一部分上。