公开(公告)号：US20090008237A1

公开(公告)日：2009-01-08

申请号：US12216372

申请日：2008-07-02

申请人： Toshikazu Yoshida ,  Tetsuyuki Murata ,  Shigeki Matsuta ,  Yasunobu Iwami ,  Yoshinori Kida ,  Hiroyuki Akita ,  Koji Hasumi

发明人： Toshikazu Yoshida ,  Tetsuyuki Murata ,  Shigeki Matsuta ,  Yasunobu Iwami ,  Yoshinori Kida ,  Hiroyuki Akita ,  Koji Hasumi

IPC分类号： C01B25/00 ,  B01J19/08

CPC分类号： H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/052

摘要： Provided is a method for producing an active material for a lithium secondary battery to enable efficient removal of iron impurities, which would become a problem in production of an active material for a lithium secondary battery, and attain a high quality. The method includes removing iron impurities in an active material for a lithium secondary battery by means of magnetic force. With this method, use of a magnetic force-generating device within a recess portion, which composes at least one part of the recess portion, enables efficient removal of only iron impurities. Thus, it is expected that a voltage drop caused by dissolution of iron compounds, i.e. impurities in a positive electrode, and their migration to a negative electrode in a battery, and decreases in charge and discharge efficiencies and a voltage drop owing to precipitation of lithium can be suppressed.

摘要翻译： 本发明提供一种锂二次电池用活性物质的制造方法，能够有效地去除铁质杂质，这在生产锂二次电池用活性物质时将成为问题，达到高质量。 该方法包括通过磁力去除锂二次电池用活性物质中的铁杂质。 利用这种方法，在构成凹部的至少一部分的凹部内使用磁力产生装置能够有效地除去铁杂质。 因此，预期由铁化合物的溶解（即正极中的杂质）及其在电池中的负极迁移引起的电压降，以及由于锂的沉淀导致的电荷和放电效率的降低以及电压降 可以抑制。

公开(公告)号：US20070212609A1

公开(公告)日：2007-09-13

申请号：US11714866

申请日：2007-03-07

申请人： Yasunobu Iwami

发明人： Yasunobu Iwami

IPC分类号： H01M4/52

CPC分类号： H01M4/131 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0587 ,  H01M2004/028

摘要： A nonaqueous electrolyte secondary battery according to an embodiment of the present invention includes, as generating elements, a positive electrode 11 which comprises, as a positive electrode, lithium nickel-cobalt-manganese oxide (LiNixCoyMnzO2) which can intercalate and deintercalate lithium ions or the mixture of lithium nickel-cobalt-manganese oxide (LiNixCoyMnzO2) and lithium manganese oxide whose amount is 0 to 50% by mass relative to the whole amount of the positive electrode active material, a negative electrode 12 which comprises a negative electrode active material which can intercalate and deintercalate lithium ions, and a nonaqueous electrolyte are provided. To the positive electrode 11, 5 to 20% by mass of lithium cobalt oxide relative to the whole amount of the positive electrode active material is added. Consequently, a nonaqueous electrolyte secondary battery with excellent level of safety is provided by adding an additive which enhances thermal stability, even if lithium nickel-cobalt-manganese oxide is used as a positive electrode active material.

摘要翻译： 根据本发明实施方式的非水电解质二次电池包括作为发电元件的正极11，其包括作为正极的锂镍钴锰氧化物锂（LiNi x Co x Co x Co 其可以插入和脱嵌锂离子或锂镍钴锰氧化物（LiNi x x O 2）的混合物 相对于全部量，其量为0〜50质量％的锂锰氧化物，和/或其中， 正极活性物质的负极12，其包含可插入和脱嵌锂离子的负极活性物质和非水电解质。 向正极11添加相对于正极活性物质的总量的5〜20质量％的钴酸锂。 因此，即使使用锂镍钴锰氧化物作为正极活性物质，也可以通过添加提高热稳定性的添加剂来提供安全性优异的非水电解质二次电池。

公开(公告)号：US20100248022A1

公开(公告)日：2010-09-30

申请号：US12721928

申请日：2010-03-11

申请人： Hironori Shirakata ,  Yasunobu Iwami ,  Masato Iwanaga

发明人： Hironori Shirakata ,  Yasunobu Iwami ,  Masato Iwanaga

IPC分类号： H01M6/14

CPC分类号： H01M10/0525 ,  H01M4/133 ,  H01M4/136 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0567 ,  Y02T10/7011

摘要： The nonaqueous electrolyte secondary battery having high output characteristics and excellent safety when overcharging as well as excellent charge and discharge cycle characteristics according to an aspect of the invention includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a separator, and a nonaqueous electrolyte. The positive electrode active material includes lithium iron phosphate having an olivine crystal structure represented by General Formula LixFePO4 (where x is 0

摘要翻译： 根据本发明的一个方面，当过充电以及充放电循环特性优异时，具有高输出特性和优异安全性的非水电解质二次电池包括具有正极活性材料的正极，具有负极活性物质的负极 ，隔膜和非水电解质。 正极活性物质包括具有由通式LixFePO4（其中x为0