公开(公告)号：US10319978B2

公开(公告)日：2019-06-11

申请号：US15604759

申请日：2017-05-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sherman Zeng ,  Xiaochao Que ,  Haijing Liu

IPC: H01M2/26 ,  H01M2/30 ,  H01M2/20 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0585

Abstract: Lithium battery cells, and battery packs comprising the same, include an electrolyte, and an anode and a cathode, each of which include a current collector having a length, the length defining a first end and a second end, a width, a host or active material disposed on the current collector between the first end and the second end, a first tab extending from the first end, and a second tab extending from the second end. A plurality of cells can be stacked in a planar configuration, and a plurality of anode first tabs, a plurality of anode second tabs, a plurality of cathode first tabs, and a plurality of cathode second tabs can each be electrically connected via a respective busbar. The anode and cathode can have a length:width ratio of at least three, or 2.5 to 10. The battery cell can be a power source for an electric/hybrid vehicle.

公开(公告)号：US20180287164A1

公开(公告)日：2018-10-04

申请号：US15471029

申请日：2017-03-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Haijing Liu ,  Zhiqiang Yu ,  Xiaochao Que

IPC: H01M4/80 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/66 ,  H01M4/04 ,  C23C18/12

CPC classification number: C23C18/1295 ,  C23C18/1208 ,  C23C18/1279 ,  C23C22/00 ,  H01M4/0404 ,  H01M4/661 ,  Y02E60/122

Abstract: A copper foil, intended for use as a current collector in a lithium-containing electrode for a lithium-based electrochemical cell, is subjected to a series of chemical oxidation and reduction processing steps to form a field of integral copper wires extending outwardly from the surfaces of the current collector (and from the copper content of the foil) to be coated with a resin-bonded porous layer of particles of active electrode material. The copper wires serve to anchor thicker layers of porous electrode material and enhance liquid electrolyte contact with the electrode particles and the current collector to improve the energy output of the cell and its useful life.

公开(公告)号：US20180287156A1

公开(公告)日：2018-10-04

申请号：US15761877

申请日：2015-10-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhiqiang Yu ,  Haijing Liu

IPC: H01M4/60 ,  H01M10/0525 ,  C09C1/36 ,  C07F7/00

Abstract: Lithium titanate, Li4Ti5O12, particles containing surface hydroxyl groups are susceptible to unwanted gas generation (such as hydrogen) in the presence of water contamination when the particles are used as active anode electrode material in lithium-ion cells operating with an anhydrous liquid electrolyte. In accordance with this disclosure, the hydroxyl groups on the surfaces of the particles are reacted with one of a group of selected agents containing organic alkoxy groups to form hydrophobic moieties on the surfaces of the particles which effectively block water molecules from the surfaces of lithium titanate particles in the anode of the cell.

公开(公告)号：US20180034037A1

公开(公告)日：2018-02-01

申请号：US15704122

申请日：2017-09-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xiusheng Zhang ,  Xiaochao Que ,  Haijing Liu

IPC: H01M4/04 ,  H01G11/50 ,  H01M4/38 ,  H01M12/02 ,  H01M12/00 ,  H01M4/13

CPC classification number: H01M4/0404 ,  H01G11/06 ,  H01G11/12 ,  H01G11/28 ,  H01G11/46 ,  H01G11/50 ,  H01G11/82 ,  H01M4/13 ,  H01M4/131 ,  H01M4/133 ,  H01M4/136 ,  H01M4/364 ,  H01M4/382 ,  H01M4/485 ,  H01M4/505 ,  H01M4/587 ,  H01M12/005 ,  H01M12/02

Abstract: Lithium-utilizing electrochemical cells, providing battery and hybrid-capacitor activity, are formed of one or more lithium battery anodes, one or more lithium battery cathodes, and one or more positive-charge or negative-charge hybrid capacitor electrodes which are formed of a combination of capacitor particles with one of anode or cathode particles. The anode and cathodes are formed of porous layers of particles of anode or cathode material, bonded to each side of a current collector foil. The hybrid capacitor electrodes are formed of porous layers of capacitor particles, mixed or layered with anode or capacitor particles, bonded to each side of a current collector foil. The compositions of the hybrid capacitors are determined to balance the capacities of the electrodes in the lithium-ion electrochemical cell to intercalate or adsorb lithium cations and corresponding anions in the electrolyte infiltrating the pores of the electrode materials.

公开(公告)号：US20170121807A1

公开(公告)日：2017-05-04

申请号：US15129886

申请日：2014-04-02

Applicant: Suxiang Deng ,  GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Suxiang Deng ,  Xiaohong Q. Gayden ,  Qiang Wu ,  Zhiqiang Yu ,  Haijing Liu ,  Dewen Kong

IPC: C23C4/134 ,  C23C4/11 ,  H01M10/0525 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62 ,  C23C4/06 ,  H01M4/04

CPC classification number: C23C4/134 ,  C23C4/04 ,  C23C4/06 ,  C23C4/11 ,  H01M4/0404 ,  H01M4/0407 ,  H01M4/0419 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/626 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20

Abstract: Layers of particles of positive or negative electrode materials for lithium-secondary cells are deposited on porous separator layers or current collector films using atmospheric plasma practices for the deposition of the electrode material particles. Before the deposition step, the non-metallic electrode material particles are coated with smaller particles of an elemental metal. The elemental metal is compatible with the particulate electrode material in the operation of the electrode and the metal particles are partially melted during the atmospheric deposition step to bond the electrode material particles to the substrate and to each other in a porous layer for infiltration with a liquid lithium ion-containing electrolyte. And the metal coating on the particles provides suitable electrical conductivity to the electrode layer during cell operation.