公开(公告)号：US10347901B2

公开(公告)日：2019-07-09

申请号：US15354640

申请日：2016-11-17

Applicant: Nissan North America, Inc.

Inventor： Ying Liu ,  Taehee Han ,  Yoshitaka Uehara

IPC: H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/13 ,  H01M4/139 ,  H01M10/0565 ,  H01M4/02 ,  H01M10/0566

Abstract: A method of preparing an electrode for a lithium-ion battery includes mixing a magnetic, electrically conductive material with a lithium conductive polymer; forming tubes of the polymer and magnetic, electrically conductive material; mixing the tubes with a slurry of an electrode material; coating a current collector with the slurry; and applying a magnetic field to the slurry to align the tubes within the slurry in relation to the current collector. The aligned tubes form electrical and ionic conductive pathways within the slurry. The tubes have a length less than half a thickness of the slurry.

公开(公告)号：US10086434B2

公开(公告)日：2018-10-02

申请号：US15084731

申请日：2016-03-30

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： Ying Liu ,  Nilesh Dale

IPC: B22F9/30 ,  B22F9/24 ,  B22F1/00

Abstract: A method of preparing shape-controlled alloy particles includes dissolving a solvent in a surfactant selected to inhibit particle growth; adding a noble metal precursor and a transition metal precursor to form a mixture; irradiating the mixture with a microwave under reflux for about thirty minutes or less at an irradiation temperature of between 185° C. and 195° C.; cooling the mixture; and drying the mixture at a temperature of between 55° C. and 65° C. to obtain shape-controlled alloy particles having a uniform shape, the shape dependent upon the surfactant used.

公开(公告)号：US10468666B2

公开(公告)日：2019-11-05

申请号：US15280588

申请日：2016-09-29

Applicant: Nissan North America, Inc.

Inventor： Ying Liu ,  Taehee Han ,  Yoshitaka Uehara

IPC: H01M4/04 ,  G01N27/02 ,  H01M4/139

Abstract: A rolling press for the manufacture of a battery electrode includes a first roller of a non-conductive material, a base of a non-conductive material spaced from the first roller equal to a desired thickness of the battery electrode, and a conductivity detector having a first electrode configured to contact a first side of the battery electrode and a second electrode configured to contact a second side of the battery electrode.

公开(公告)号：US10199653B2

公开(公告)日：2019-02-05

申请号：US14928191

申请日：2015-10-30

Applicant: Nissan North America, Inc.

Inventor： Kan Huang ,  Nilesh Dale ,  Xiaoguang Hao ,  Jessica Weber ,  Ying Liu

IPC: H01M4/62 ,  H01M2/16 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/04

Abstract: A battery has a three dimensional electrode including a current collector, electron directing members, each electron directing member having a perimeter edge attached to a surface of the current collector with a polymer binder, the electron directing members extending from the surface of the current collector and configured to direct electron flow along a layered direction of the electrode, an active material layer on the current collector and a separator. The electron directing members extend into the active material layer and having a free end in spaced relation to the separator.

公开(公告)号：US20170271654A1

公开(公告)日：2017-09-21

申请号：US15071888

申请日：2016-03-16

Applicant: NISSAN NORTH AMERICA, INC.

Inventor： Ying Liu ,  Kenzo Oshihara

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/628 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122

Abstract: A lithium ion battery has an anode comprising a current collector, a separator and an active material layer having active material particles. Each active material particle comprises a core of an alloying material including silicon and a polymer coating on the core, the polymer coating comprising a heat-shrinking polymer that shrinks as temperature increases. As cycling increases across a life of the lithium ion battery, an expansion amount of the alloying material of the core increases, temperature of the anode increases, and an amount of shrinkage of the polymer coating increases, such that as the core attempts to expand against the polymer coating, the polymer coating exerts an opposite force on the core.

公开(公告)号：US09985275B2

公开(公告)日：2018-05-29

申请号：US14928253

申请日：2015-10-30

Applicant: Nissan North America, Inc.

Inventor： Kan Huang ,  Nilesh Dale ,  Xiaoguang Hao ,  Jessica Weber ,  Ying Liu

IPC: H01M4/04 ,  H01M4/66 ,  H01M4/70 ,  H01M4/75 ,  H01M4/78 ,  H01M10/052

CPC classification number: H01M4/0428 ,  H01M4/043 ,  H01M4/661 ,  H01M4/663 ,  H01M4/70 ,  H01M4/75 ,  H01M4/78 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: A method of making a three dimensional electrode having an active material layered between a current collector and a separator includes growing nanotubes at predetermined points on a first sheet of electron directing material, wherein the electron directing material is highly conductive and chemically inert; aligning the nanotubes in a direction perpendicular to the first sheet; functionalizing a distal end of each nanotube; bonding a second sheet of electron directing material to the functionalized distal end of each nanotube; depositing magnetic particles along the second sheet; applying a magnetic field to the magnetic particles to rotate the first sheet, the second sheet and the nanotubes ninety degrees to form an electron directing structure; and attaching the electron directing structure on a surface of the current collector with a polymer binder. The electron directing structure is configured to direct electron flow along a layered direction of the three dimensional electrode.

公开(公告)号：US20180138493A1

公开(公告)日：2018-05-17

申请号：US15354640

申请日：2016-11-17

Applicant: Nissan North America, Inc.

Inventor： Ying Liu ,  Taehee Han ,  Yoshitaka Uehara

IPC: H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/137 ,  H01M4/60

CPC classification number: H01M4/0404 ,  H01M4/04 ,  H01M4/13 ,  H01M4/139 ,  H01M4/624 ,  H01M4/626 ,  H01M10/0525 ,  H01M10/0565 ,  H01M10/0566 ,  H01M2004/021 ,  H01M2300/0082 ,  Y02T10/7011

Abstract: A method of preparing an electrode for a lithium-ion battery includes mixing a magnetic, electrically conductive material with a lithium conductive polymer; forming tubes of the polymer and magnetic, electrically conductive material; mixing the tubes with a slurry of an electrode material; coating a current collector with the slurry; and applying a magnetic field to the slurry to align the tubes within the slurry in relation to the current collector. The aligned tubes form electrical and ionic conductive pathways within the slurry. The tubes have a length less than half a thickness of the slurry.

公开(公告)号：US20180123122A1

公开(公告)日：2018-05-03

申请号：US15339636

申请日：2016-10-31

Applicant: Nissan North America, Inc.

Inventor： Ying Liu ,  Taehee Han ,  Yoshitaka Uehara

IPC: H01M4/139 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/36

CPC classification number: H01M4/139 ,  H01M4/0404 ,  H01M4/0471 ,  H01M10/0525 ,  H01M2004/025

Abstract: A method of preparing an electrode for a lithium-ion battery includes coating a slurry of electrode material onto a current collector, penetrating the slurry with rods coated with a polymer that expands when heated and shrinks when cooled, heating the rods coated with polymer while penetrated in the slurry. The polymer expands during heating, and then shrinks when cooled. The cooled rods and the polymer are removed from the slurry, leaving micro-pathways in the slurry where the rods and polymer penetrated.

公开(公告)号：US20180090742A1

公开(公告)日：2018-03-29

申请号：US15280588

申请日：2016-09-29

Applicant: Nissan North America, Inc.

Inventor： Ying Liu ,  Taehee Han ,  Yoshitaka Uehara

IPC: H01M4/04 ,  H01M10/0525 ,  G01N27/02

CPC classification number: H01M4/0435 ,  G01N27/02 ,  H01M4/139

Abstract: A rolling press for the manufacture of a battery electrode includes a first roller of a non-conductive material, a base of a non-conductive material spaced from the first roller equal to a desired thickness of the battery electrode, and a conductivity detector having a first electrode configured to contact a first side of the battery electrode and a second electrode configured to contact a second side of the battery electrode.

公开(公告)号：US09780362B2

公开(公告)日：2017-10-03

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: H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/80 ,  H01M4/133 ,  H01M4/134 ,  H01M4/587 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62

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.