公开(公告)号：US20200295364A1

公开(公告)日：2020-09-17

申请号：US16765203

申请日：2018-11-21

Applicant: GS Yuasa International Ltd.

Inventor： Sumio MORI ,  Tomonori KAKO ,  Akihiko MIYAZAKI ,  Masashi TAKANO ,  Ukyo HARINAGA

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

Abstract: The present embodiment provides a lithium ion secondary battery including a positive electrode containing LiaNixCoyMzO2 (0.9≤a≤1.2, 0.3≤x≤0.8, 0.2≤y+z≤0.7, where M is a metal element other than Li, Ni, and Co) as a positive active material, and a negative electrode containing non-graphitic carbon as a negative active material. In this lithium ion secondary battery, at a portion where the positive electrode and the negative electrode face each other, a basis weight (P) of the positive active material and a basis weight (N) of the negative active material satisfy a relational expression of 0.65≤P/N≤1.05.

公开(公告)号：US20190221833A1

公开(公告)日：2019-07-18

申请号：US16330483

申请日：2017-09-06

Applicant: GS Yuasa International Ltd.

Inventor： Ryosuke SHIMOKAWA ,  Tomonori KAKO ,  Shota ITO ,  Kazuki KAWAGUCHI

IPC: H01M4/139 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/139 ,  H01G11/24 ,  H01G11/86 ,  H01M4/13 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/621 ,  H01M10/0525 ,  H01M2004/021 ,  Y02E60/13

Abstract: An energy storage device is provided that has improved power performance at low temperature. In the present embodiment, an energy storage device is provided that includes an electrode having an active material layer, the active material layer contains at least active material particles, the particles contained in the active material layer gives a volume-based particle size frequency distribution that has a first peak and a second peak appearing in a particle size larger than a particle size of the first peak, and particles having particle sizes equal to or smaller than a particle size Dx have a volume proportion of 49% or more and 62% or less in a volume of whole particles contained in the active material layer, with the particle size Dx defined as a particle size at a local minimum frequency between the first peak and the second peak in the particle size frequency distribution.

公开(公告)号：US20160248065A1

公开(公告)日：2016-08-25

申请号：US15052330

申请日：2016-02-24

Applicant: GS Yuasa International Ltd.

Inventor： Akihiko MIYAZAKI ,  Kenta NAKAI ,  Tomonori KAKO ,  Sumio MORI

IPC: H01M2/16 ,  H01M4/583 ,  H01G11/26 ,  H01G11/42 ,  H01G11/52 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M2/1673 ,  H01G11/26 ,  H01G11/42 ,  H01G11/52 ,  H01M2/166 ,  H01M2/1686 ,  H01M4/133 ,  H01M4/364 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M4/62 ,  H01M4/622 ,  H01M10/0525 ,  H01M2004/021

Abstract: An energy storage device includes a positive electrode, a negative electrode, and an insulating layer arranged between these electrodes to electrically insulate these electrodes. The negative electrode includes a composite layer containing active material particles. The composite layer of the negative electrode, and the positive electrode are arranged to face each other across the insulating layer. The insulating layer contains electrically insulating particles, and is made porous by a gap between these particles. The composite layer of the negative electrode is made porous by a gap between the active material particles, and “−0.8≦Log B−Log A≦1.0” is satisfied in which in a pore distribution of the composite layer, a pore peak diameter is represented by A (μm), and in a pore distribution of the insulating layer, a peak diameter is represented by B (μm).

Abstract translation: 能量存储装置包括正电极，负电极和布置在这些电极之间的绝缘层，以使这些电极电绝缘。 负极包括含有活性物质粒子的复合层。 负极的复合层和正极配置成在绝缘层上彼此面对。 绝缘层包含电绝缘的颗粒，并且由这些颗粒之间的间隙制成多孔的。 通过活性物质粒子之间的间隙使负极的复合层多孔化，并且满足“-0.8≤LogB-LogA≤1.0”，其中在复合层的孔分布中，孔峰直径为 由A（μm）表示，并且在绝缘层的孔分布中，峰值直径由B（μm）表示。

公开(公告)号：US20150340737A1

公开(公告)日：2015-11-26

申请号：US14716119

申请日：2015-05-19

Applicant: GS Yuasa International Ltd.

Inventor： Tomonori KAKO ,  Sumio MORI ,  Akihiko MIYAZAKI ,  Kenta NAKAI

IPC: H01M10/0567 ,  H01M4/58 ,  H01M10/04 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y10T29/49112

Abstract: A method including: a placing step of placing an electrode assembly including a positive electrode that contains a positive active material and a negative electrode that contains a negative active material, and an electrolyte solution containing an additive in a container; a charging step of charging the electrode assembly placed in the container; and a hermetically sealing step of hermetically sealing the container after the charging step. When starting charging in the charging step, the electrolyte solution contains 1.0 mass % or less of lithium difluoro bis(oxalate)phosphate as the additive. The charge voltage in the charging step is 4.0 V or more.

Abstract translation: 一种方法，包括：放置步骤，将包括正极活性物质的正极和含有负极活性物质的负极的电极组合物和含有添加剂的电解液放置在容器中; 对放置在容器中的电极组件充电的充电步骤; 以及在充电步骤之后气密地密封容器的气密密封步骤。 当在充电步骤中开始充电时，电解质溶液含有1.0质量％以下的作为添加剂的二氟化二（双（草酸）磷酸锂。 充电步骤中的充电电压为4.0V以上。

公开(公告)号：US20150093647A1

公开(公告)日：2015-04-02

申请号：US14497823

申请日：2014-09-26

Applicant: GS Yuasa International Ltd.

Inventor： Tomonori KAKO ,  Sumio MORI ,  Akihiko MIYAZAKI ,  Kenta NAKAI

IPC: H01M4/583 ,  H01M4/525 ,  H01M10/052 ,  H01M4/505

CPC classification number: H01M4/583 ,  H01M4/131 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2220/20 ,  Y02T10/7011

Abstract: A battery includes a positive electrode, a negative electrode including a negative active material layer containing hardly-graphitizable carbon as a negative active material and an aqueous binder, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative active material layer has a density of not less than 0.81 g/cc and not more than 1.01 g/cc. The negative active material has a particle size D90 of not less than 1.9 μm and not more than 11.5 μm, the particle size D90 being a particle size at which the cumulative volume is 90% in the particle size distribution.

Abstract translation: 电池包括正电极，负极包括含有难以石墨化的碳作为负极活性物质的负极活性物质层和水性粘合剂，设置在正极和负极之间的隔板和非水电解质。 负极活性物质层的密度不小于0.81g / cc且不大于1.01g / cc。 负极活性物质的粒径D90为1.9μm以上11.5μm以下，粒径D90为粒径分布中累积体积为90％的粒径。

公开(公告)号：US20150092320A1

公开(公告)日：2015-04-02

申请号：US14497781

申请日：2014-09-26

Applicant: GS Yuasa International Ltd.

Inventor： Akihiko MIYAZAKI ,  Sumio MORI ,  Tomonori KAKO ,  Kenta NAKAI

IPC: H01G9/042 ,  H01G9/15

CPC classification number: H01G9/042 ,  H01G9/0425 ,  H01G9/15 ,  H01M4/505 ,  H01M4/525 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20 ,  Y02E60/122 ,  Y02T10/7011

Abstract: An electric storage device having a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode has a positive substrate layer, a positive composite layer containing a positive active material, and an undercoat layer located between the positive substrate layer and the positive composite layer. A density of the positive composite layer is 2.1 g/cm3 or more and 2.7 g/cm3 or less. The positive electrode has the rate of increase in sheet resistance after a solvent immersion test of 30% or less. The undercoat layer contains a binder selected from the group consisting of chitosan derivatives, cellulose derivatives and acrylic acid derivatives.

Abstract translation: 具有正极，负极，位于正极和负极之间的隔膜的非蓄电装置以及非水电解质。 该正电极具有正的衬底层，含有正极活性材料的正性复合层，以及位于正性衬底层和正性复合层之间的底涂层。 正极复合层的密度为2.1g / cm 3以上且2.7g / cm 3以下。 正极在溶剂浸渍试验后的薄层电阻增加率为30％以下。 底涂层含有选自壳聚糖衍生物，纤维素衍生物和丙烯酸衍生物的粘合剂。