公开(公告)号：US20150086868A1

公开(公告)日：2015-03-26

申请号：US14494898

申请日：2014-09-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Naoki KURIHARA ,  Junpei MOMO

IPC: H01M4/134 ,  H01M4/36 ,  H01M4/62

Abstract: An object of one embodiment of the present invention is to provide a secondary battery in which deterioration of charge-discharge cycle characteristics is suppressed, to suppress generation of defects caused by expansion and contraction of an active material in a negative electrode, or to prevent deterioration caused by deformation of a secondary battery. To prevent deterioration, a material that can be alloyed with lithium and fluidified easily is used for a negative electrode. To hold a negative electrode active material over a surface of a current collector, a covering layer that covers the negative electrode active material is provided. Furthermore, a portion where the current collector and the negative electrode active material are in contact with each other is alloyed. In other words, an alloy that is in contact with both the current collector and the negative electrode active material is provided in the negative electrode.

Abstract translation: 本发明的一个实施方案的目的是提供一种其中抑制充放电循环特性恶化的二次电池，以抑制由负极中的活性物质的膨胀和收缩引起的缺陷的产生，或防止劣化 由二次电池的变形造成的。 为了防止劣化，可以使用能够与锂合金化并容易流动的材料用于负极。 为了将负极活性物质保持在集电体的表面上，设置覆盖负极活性物质的覆盖层。 此外，集电体和负极活性物质彼此接触的部分合金化。 换句话说，在负极中设置与集电体和负极活性物质两者接触的合金。

公开(公告)号：US20200168892A1

公开(公告)日：2020-05-28

申请号：US16774296

申请日：2020-01-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Naoki KURIHARA ,  Junpei MOMO

IPC: H01M4/134 ,  H01M4/62 ,  H01M4/66 ,  H01M10/052 ,  H01M4/38

Abstract: An object of one embodiment of the present invention is to provide a secondary battery in which deterioration of charge-discharge cycle characteristics is suppressed, to suppress generation of defects caused by expansion and contraction of an active material in a negative electrode, or to prevent deterioration caused by deformation of a secondary battery. To prevent deterioration, a material that can be alloyed with lithium and fluidified easily is used for a negative electrode. To hold a negative electrode active material over a surface of a current collector, a covering layer that covers the negative electrode active material is provided. Furthermore, a portion where the current collector and the negative electrode active material are in contact with each other is alloyed. In other words, an alloy that is in contact with both the current collector and the negative electrode active material is provided in the negative electrode.

公开(公告)号：US20150132648A1

公开(公告)日：2015-05-14

申请号：US14528579

申请日：2014-10-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Naoki KURIHARA ,  Junpei MOMO

IPC: H01M4/80 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/38 ,  H01M4/66

CPC classification number: H01M4/80 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/387 ,  H01M4/661 ,  H01M4/668 ,  H01M2220/30

Abstract: To inhibit degradation of charge and discharge cycle characteristics of a secondary battery. To suppress generation of defects due to expansion and contraction of an active material in a negative electrode. To inhibit deterioration of an electrode due to changes in its form. An electrode member including a current collector, an active material, and a porous body is used. The porous body is in contact with one surface of the current collector and includes a plurality of spaces. The active material is located in the space in the porous body. The space has a larger size than the active material.

Abstract translation: 为了抑制二次电池的充放电循环特性的劣化。 抑制由负极中的活性物质的膨胀和收缩导致的缺陷的产生。 为了抑制由于其形状的变化引起的电极的劣化。 使用包括集电体，活性物质和多孔体的电极构件。 多孔体与集电体的一个表面接触并且包括多个空间。 活性物质位于多孔体的空间中。 该空间的尺寸比活性材料大。

公开(公告)号：US20170133660A1

公开(公告)日：2017-05-11

申请号：US15127290

申请日：2015-03-12

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Naoki KURIHARA ,  Junpei MOMO ,  Ryota TAJIMA

IPC: H01M4/04 ,  H01M4/58 ,  H01M10/0568 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M4/0445 ,  H01M2/14 ,  H01M4/13 ,  H01M4/582 ,  H01M4/661 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2220/30

Abstract: A lithium-ion secondary battery with no negative electrode active material is provided. One embodiment of the present invention is a lithium-ion secondary battery including a positive electrode, a negative electrode, an electrolyte solution, and a separator between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector which includes a region in direct contact with at least one of the electrolyte solution and the separator. The electrolyte solution contains fluorine. The negative electrode current collector has a function of making a deposit containing lithium to be deposited on a surface in charging. Furthermore, a spacer may be provided between the separator and the negative electrode. The electrolyte solution may contain an organic compound containing fluorine. Supply of fluorine from the electrolyte solution to lithium deposited on the surface of the negative electrode can suppress deposition of lithium dendrites (whiskers) in further deposition.

公开(公告)号：US20140370379A1

公开(公告)日：2014-12-18

申请号：US14294481

申请日：2014-06-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Junpei MOMO ,  Ryota TAJIMA ,  Naoki KURIHARA

IPC: H01M4/36

CPC classification number: H01M4/134 ,  H01M4/0416 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/623 ,  H01M4/80 ,  H01M10/052

Abstract: To increase the capacity and energy density of a secondary battery by using a novel material as a material for a negative electrode in order to increase the amount of lithium ions transferred in charge and discharge. In the case where the negative electrode includes a current collector and a negative electrode active material layer, gallium is used as the negative electrode active material, and the negative electrode active material layer contains resin at 2 wt % or more, preferably 10 wt % or more, adhesion between the current collector and the negative electrode active material can be increased. This inhibits separation between the current collector and the negative electrode active material due repeated expansion and contraction, resulting in longer lifetime of the secondary battery.

Abstract translation: 为了通过使用新型材料作为负极材料来增加二次电池的容量和能量密度，以增加在充电和放电中转移的锂离子的量。 在负极包括集电体和负极活性物质层的情况下，使用镓作为负极活性物质，负极活性物质层含有2重量％以上，优选为10重量％以上的树脂，或者 此外，可以提高集电体与负极活性物质的粘附性。 由于反复的膨胀和收缩，这抑制了集电体和负极活性物质的分离，导致二次电池的寿命更长。