公开(公告)号：US20150325855A1

公开(公告)日：2015-11-12

申请号：US14704508

申请日：2015-05-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Tatsuya IKENUMA ,  Teruaki OCHIAI ,  Shunhei YOSHITOMI ,  Mako MOTOYOSHI ,  Hiroyuki MIYAKE ,  Yohei MOMMA ,  Takuya HIROHASHI ,  Satoshi SEO

IPC: H01M4/485 ,  H01M4/48 ,  G06F1/16 ,  H01M4/62 ,  H01M4/583 ,  H01M10/052 ,  H01M4/36

CPC classification number: H01M4/485 ,  G04C10/00 ,  G04G21/00 ,  G06F1/16 ,  G06F1/1626 ,  G06F1/163 ,  G06F1/1635 ,  G06F1/1652 ,  H01M4/366 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/623 ,  H01M4/625 ,  H01M10/052 ,  H01M2220/30

Abstract: A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with improved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.

Abstract translation: 提供高容量的锂离子二次电池。 或者，提供具有改善的循环特性的锂离子二次电池。 为了实现这一点，提供了包括具有解理面的粒子和包含至少部分解理面的碳的活性物质。 具有解理面的粒子含有锂，锰，镍和氧。 含碳层优选含有石墨烯。 当使用包括具有解理面的电极的电极制造锂离子二次电池时，其中至少一部分被包含碳作为活性材料的层被覆盖，可以提高放电容量并提高循环特性。