公开(公告)号：US20170125799A1

公开(公告)日：2017-05-04

申请号：US14928424

申请日：2015-10-30

Applicant: Nissan North America, Inc.

Inventor： XIAOGUANG HAO ,  KENZO OSHIHARA

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/13 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/134 ,  H01M4/624 ,  H01M4/625 ,  H01M4/626 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: Electrodes having at least one current correcting layer between the current collector and the separator drive electron flow in a direction perpendicular to the X-Y plane. Such an electrode includes a current collector, a first active material layer coated on the current collector, a first current correcting layer on the first active material layer opposite the current collector and a second active material layer on the first current correcting layer opposite the first active material layer. The first current correcting layer is a highly conductive, porous material that is not electrochemically active, the first current correcting layer being uniformly formed along an X-Y plane of the electrode.

公开(公告)号：US20170194672A1

公开(公告)日：2017-07-06

申请号：US14984541

申请日：2015-12-30

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： JESSICA WEBER ,  KENZO OSHIHARA

IPC: H01M10/44 ,  H01M10/0525 ,  H01M10/46 ,  H01M4/38

Abstract: A method for preparing a lithium ion battery having improved discharge capacity retention in which, prior to using the lithium ion battery having at least one unit cell, a discharging current is applied to the unit cell in a manner such that the delithiation speed of alloying particles is greater than their volume contraction upon delithiation.

公开(公告)号：US20170179488A1

公开(公告)日：2017-06-22

申请号：US14977843

申请日：2015-12-22

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： XIAOGUANG HAO ,  KENZO OSHIHARA

IPC: H01M4/62 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/62 ,  H01M4/13 ,  H01M4/362 ,  H01M4/386 ,  H01M4/387 ,  H01M4/587 ,  H01M10/0525 ,  H01M2220/20

Abstract: Electrodes incorporate an electrically activated matrix into which active material is provided. The active material includes alloying particles, which, as used herein, are active catalyst particles that have a high lithium storage capacity resulting in large volume expansions during lithiation. The electrically activated matrix is activated during charging and discharging of the battery, and when activated, maintains the electrode structure and stability by expanding and contracting with the volume expansion and contraction of the alloying particles during lithiation and delithiation, respectively. The electrically activated matrix also reduces cracking and pulverization of the alloying particles, maintaining electrical conductivity between active materials, thereby maintaining battery energy density through the life of the battery.

公开(公告)号：US20170179489A1

公开(公告)日：2017-06-22

申请号：US14977891

申请日：2015-12-22

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： KENZO OSHIHARA ,  XIAOGUANG HAO

IPC: H01M4/62 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/04 ,  H01M4/74

Abstract: A method of making an electrode for a lithium ion battery includes providing a restricting media having a main body with opposing planar surfaces and depositing alloying particles on the opposing planar surfaces to form a restrained active particle layer. The restricting media can be a magnetic, electrochemically inactive material with an affinity for the alloying particles. The restricting media restrains expansion of the alloying particles during lithiation to a respective side of the restricting media. Electrodes include a current collector and an electrode material layer adjacent the current collector including the restricting media, the alloying particles deposited on the restricting media to form a restrained active particle layer, and a carbon material in contact with the alloying particles

公开(公告)号：US20160211513A1

公开(公告)日：2016-07-21

申请号：US14597389

申请日：2015-01-15

Applicant: Nissan North America, Inc.

Inventor： XIAOGUANG HAO ,  KENZO OSHIHARA

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/386 ,  H01M4/387 ,  H01M4/587 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: An electrode comprises a current collector and a multi-layer active material formed on the current collector. The multi-layer active material includes at least one active composite unit having a first layer consisting essentially of a first carbon material having electrochemical activity and a binder and a second layer formed on the first layer comprising a high energy density material. A top layer is formed on the active composite unit consisting essentially of a second carbon material having electrochemical activity and a binder. The electrode provides even current distribution and compensates for particle volume expansion.

Abstract translation: 电极包括形成于集电体上的集电体和多层活性物质。 多层活性材料包括至少一种活性复合单元，其具有基本上由具有电化学活性的第一碳材料和粘合剂组成的第一层和在包含高能量密度材料的第一层上形成的第二层。 主要由具有电化学活性的第二碳材料和粘合剂组成的活性复合单元上形成顶层。 电极提供均匀的电流分布并补偿颗粒体积膨胀。

公开(公告)号：US20170194671A1

公开(公告)日：2017-07-06

申请号：US14984449

申请日：2015-12-30

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： JESSICA WEBER ,  KENZO OSHIHARA

IPC: H01M10/44 ,  H01M10/058 ,  H01M10/46 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M10/446 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/661 ,  H01M10/052 ,  H01M10/058 ,  H01M2220/20 ,  Y02E60/122

Abstract: A method for preparing a lithium ion battery having improved discharge capacity retention in which, prior to using the lithium ion battery having at least one unit cell, a discharging current is applied to the unit cell in a manner such that the delithiation speed of alloying particles is greater than their volume contraction upon delithiation.

公开(公告)号：US20170125797A1

公开(公告)日：2017-05-04

申请号：US14928362

申请日：2015-10-30

Applicant: Nissan North America, Inc.

Inventor： XIAOGUANG HAO ,  JESSICA WEBER ,  KENZO OSHIHARA ,  YING LIU

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M4/04 ,  H01M4/38 ,  H01M4/80 ,  H01M4/134

CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/13 ,  H01M4/139 ,  H01M4/386 ,  H01M4/587 ,  H01M4/624 ,  H01M4/808

Abstract: Electrodes made with a matrix selectively loaded with particular active particles provide uniform distribution and reduce issues due to particle expansion. The electrode has a current collector, a separator and a matrix having first pores having a first size and second pores having a second size, the first size being larger than the second size, the second pores being uniformly distributed throughout the matrix; first active particles deposited in the first pores, the first active particles having a first particle size smaller than the first pores and larger than the second pores; and second active particles deposited in the second pores, the second active particles having a second particle size smaller than the second pores.

公开(公告)号：US20160211524A1

公开(公告)日：2016-07-21

申请号：US14597353

申请日：2015-01-15

Applicant: Nissan North America, Inc.

Inventor： XIAOGUANG HAO ,  KENZO OSHIHARA

IPC: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M4/36 ,  H01M4/136 ,  H01M4/58 ,  H01M4/131 ,  H01M4/38

CPC classification number: H01M4/0404 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/661 ,  H01M4/663 ,  H01M4/669

Abstract: An electrode comprises a current collector, a conductive buffer layer formed on the current collector consisting essentially of carbon and a binder, and an active material layer formed on the buffer layer. Another conductive buffer layer can be formed on an opposing side of the current collector, with the active material formed on this other buffer layer. The active material layer can be either an anode active material layer or a cathode active material layer.

Abstract translation: 电极包括集电器，形成在基本上由碳和粘合剂组成的集电器上的导电缓冲层和形成在缓冲层上的活性材料层。 另一个导电缓冲层可以形成在集电器的相对侧上，活性材料形成在该另一个缓冲层上。 活性物质层可以是阳极活性物质层或阴极活性物质层。