公开(公告)号：US10573879B2

公开(公告)日：2020-02-25

申请号：US15115870

申请日：2015-02-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Qiangfeng Xiao ,  Mei Cai ,  Meng Jiang ,  Xingcheng Xiao

IPC: H01M4/04 ,  H01M4/38 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/134 ,  H01M10/052 ,  H01M10/0567 ,  H01M4/1395 ,  H01M10/0525

Abstract: In an example of a method for enhancing the performance of a silicon-based negative electrode, the silicon-based negative electrode is pre-lithiated in an electrolyte including a lithium salt dissolved in a solvent mixture of dimethoxyethane (DME) and fluoroethylene carbonate (FEC). The DME and FEC are present in a volume to volume ratio ranging from 10 to 1 to 1 to 10. The pre-lithiation forms a stable solid electrolyte interface layer on an exposed surface of the negative electrode.

公开(公告)号：US10312501B2

公开(公告)日：2019-06-04

申请号：US14954181

申请日：2015-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Fang Dai ,  Qiangfeng Xiao ,  Mark W. Verbrugge

IPC: H01M4/04 ,  H01M10/0568 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/36 ,  H01M10/052 ,  H01M10/0562

Abstract: An example electrolyte includes a solvent, a lithium salt, and an additive selected from the group consisting of a silane with at least one Si—H group; a fluorinated methoxysilane; a fluorinated chlorosilane; and combinations thereof. The electrolyte may be used in a method for making a solid electrolyte interface (SEI) layer on a surface of a lithium electrode. A negative electrode structure may be formed from the method.

公开(公告)号：US10141559B2

公开(公告)日：2018-11-27

申请号：US15091331

申请日：2016-04-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qiangfeng Xiao ,  Mei Cai

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/052 ,  H01M4/13

Abstract: A porous interlayer for a lithium-sulfur battery includes an electronic component and a negatively charged or chargeable lithium ion conducting component. The electronic component is selected from a carbon material, a conductive polymeric material, and combinations thereof. In an example, the porous interlayer may be disposed between a sulfur-based positive electrode and a porous polymer separator in a lithium-sulfur battery. In another example, the porous interlayer may be formed on a surface of a porous polymer separator.

公开(公告)号：US09437863B2

公开(公告)日：2016-09-06

申请号：US13785783

申请日：2013-03-05

Applicant: GM Global Technology Operations LLC

Inventor： Qiangfeng Xiao ,  Mei Cai

IPC: B05D3/02 ,  H01M4/04 ,  B05D3/04 ,  H01M4/1391 ,  H01M4/36

CPC classification number: H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  Y02E60/122

Abstract: A surface coating method and a method for reducing irreversible capacity loss of a lithium rich transitional oxide electrode are disclosed herein. In an example of the surface coating method, a dispersion of a lithium rich transitional oxide powder and an oxide precursor or a phosphate precursor in a liquid is formed. The liquid is evaporated. The forming and evaporating steps are carried out in the absence of air to prevent precipitation of the oxide precursor or the phosphate precursor. Hydrolyzation of the oxide precursor or the phosphate precursor is controlled under predetermined conditions, and an intermediate product is formed. The intermediate product is annealed to form an oxide coated lithium rich transitional oxide powder or the phosphate coated lithium rich transitional oxide powder.

Abstract translation: 本文公开了一种降低富锂过渡氧化物电极的不可逆容量损失的表面涂覆方法和方法。 在表面涂布方法的一个实例中，形成富锂的过渡氧化物粉末和氧化物前体或磷酸盐前体在液体中的分散体。 液体蒸发。 成型和蒸发步骤在不存在空气的情况下进行，以防止氧化物前体或磷酸盐前体沉淀。 在预定条件下控制氧化物前体或磷酸盐前体的水解，形成中间产物。 将中间产物退火以形成氧化物涂覆的富锂过渡氧化物粉末或磷酸盐包覆的富锂过渡氧化物粉末。

公开(公告)号：US20150104690A1

公开(公告)日：2015-04-16

申请号：US14052032

申请日：2013-10-11

Applicant: GM Global Technology Operations LLC

Inventor： Qiangfeng Xiao ,  Mei Cai

IPC: H01M2/16 ,  H01M10/052

CPC classification number: H01M2/1686 ,  H01M2/145 ,  H01M2/1613 ,  H01M2/162 ,  H01M2/1646 ,  H01M2/1653 ,  H01M2/166 ,  H01M4/13 ,  H01M10/052 ,  Y02E60/122

Abstract: A porous interlayer for a lithium-sulfur battery includes an electronic component and a negatively charged or chargeable lithium ion conducting component. The electronic component is selected from a carbon material, a conductive polymeric material, and combinations thereof. In an example, the porous interlayer may be disposed between a sulfur-based positive electrode and a porous polymer separator in a lithium-sulfur battery. In another example, the porous interlayer may be formed on a surface of a porous polymer separator.

Abstract translation: 用于锂硫电池的多孔中间层包括电子部件和带负电荷或带电荷的锂离子传导部件。 电子部件选自碳材料，导电聚合材料及其组合。 在一个实例中，多孔中间层可以设置在锂硫电池中的硫基正极和多孔聚合物隔板之间。 在另一个实例中，多孔中间层可以形成在多孔聚合物隔板的表面上。

公开(公告)号：US20140272573A1

公开(公告)日：2014-09-18

申请号：US13828755

申请日：2013-03-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qiangfeng Xiao ,  Mei Cai

IPC: H01M4/134 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/62

CPC classification number: H01M4/134 ,  B01J13/20 ,  B01J13/203 ,  C01B33/023 ,  C01B33/18 ,  H01M4/049 ,  H01M4/1395 ,  H01M4/386 ,  H01M4/621 ,  H01M4/625 ,  H01M2004/027 ,  Y02E60/122

Abstract: Anodes including mesoporous hollow silicon particles are disclosed herein. A method for synthesizing the mesoporous hollow silicon particles is also disclosed herein. In one example of the method, a silicon dioxide sphere having a silicon dioxide solid core and a silicon dioxide mesoporous shell is formed. The silicon dioxide mesoporous shell is converted to a silicon mesoporous shell using magnesium vapor. The silicon dioxide solid core, any residual silicon dioxide, and any magnesium-containing by-products are removed to form the mesoporous, hollow silicon particle.

Abstract translation: 本文公开了包括介孔中空硅颗粒的阳极。 本文还公开了一种合成中孔硅颗粒的方法。 在该方法的一个实例中，形成具有二氧化硅固体核和二氧化硅介孔壳的二氧化硅球。 使用镁蒸气将二氧化硅介孔壳转化为硅介孔壳。 除去二氧化硅固体核，任何残余二氧化硅和任何含镁副产物以形成介孔中空硅颗粒。

公开(公告)号：US20190371090A1

公开(公告)日：2019-12-05

申请号：US15995245

申请日：2018-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wen-Chiao Lin ,  Jingyan Wan ,  Jian Yao ,  Neeraj S. Shidore ,  Qiangfeng Xiao ,  Ming Yang ,  Paul E. Krajewski

IPC: G07C5/08 ,  G01B7/16 ,  G01L5/00

Abstract: Vehicles and methods are provided for monitoring the health of a substrate and a protective coating disposed on the substrate. A vehicle includes a substrate, a protective coating, a coating deformation sensor, and a controller. The protective coating is disposed overtop the substrate. The coating deformation sensor is operatively coupled with the protective coating and configured to measure a deformation value of the protective coating. The controller is configured to: determine a deformation recovery rate of the protective coating based on the deformation value; determine whether the deformation recovery rate corresponds with an expected recovery rate of the protective coating; and indicate that the protective coating may be impaired in response to determining that the deformation recovery rate does not correspond with the expected recovery rate.

公开(公告)号：US10367201B2

公开(公告)日：2019-07-30

申请号：US15085510

申请日：2016-03-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Qiangfeng Xiao ,  Xiaosong Huang ,  Mark W. Verbrugge

IPC: H01M4/60 ,  H01M10/0565 ,  H01M10/058 ,  H01M4/04 ,  H01M4/137 ,  H01M4/1399 ,  H01M4/36 ,  H01M4/38 ,  H01M2/16 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/02

Abstract: A negative electrode includes a metal substrate and a polymeric single-ion conductor coating formed on a surface of the metal substrate. The metal substrate is selected from the group consisting of lithium, sodium, and zinc. The polymeric single-ion conductor coating is formed of i) a metal salt of a sulfonated tetrafluoroethylene-based fluoropolymer copolymer or ii) a polymeric metal salt having an initial polymeric backbone and pendent metal salt groups attached to the initial polymeric backbone.

公开(公告)号：US20170288230A1

公开(公告)日：2017-10-05

申请号：US15085510

申请日：2016-03-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Qiangfeng Xiao ,  Xiaosong Huang ,  Mark W. Verbrugge

IPC: H01M4/60 ,  H01M4/38 ,  H01M4/1399 ,  H01M4/36 ,  H01M4/04 ,  H01M4/137

CPC classification number: H01M4/604 ,  H01M2/1673 ,  H01M4/0402 ,  H01M4/0407 ,  H01M4/134 ,  H01M4/137 ,  H01M4/1395 ,  H01M4/1399 ,  H01M4/366 ,  H01M4/38 ,  H01M4/381 ,  H01M4/382 ,  H01M10/0565 ,  H01M10/058 ,  H01M2004/027 ,  H01M2220/20

Abstract: A negative electrode includes a metal substrate and a polymeric single-ion conductor coating formed on a surface of the metal substrate. The metal substrate is selected from the group consisting of lithium, sodium, and zinc. The polymeric single-ion conductor coating is formed of i) a metal salt of a sulfonated tetrafluoroethylene-based fluoropolymer copolymer or ii) a polymeric metal salt having an initial polymeric backbone and pendent metal salt groups attached to the initial polymeric backbone.

公开(公告)号：US20170214079A1

公开(公告)日：2017-07-27

申请号：US15377752

申请日：2016-12-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Qiangfeng Xiao ,  Li Yang ,  Mei Cai ,  Sherman H. Zeng

IPC: H01M10/04 ,  H01M4/58 ,  H01M4/587 ,  H01M4/38 ,  H01M4/36

CPC classification number: H01M10/045 ,  H01M4/362 ,  H01M4/38 ,  H01M4/382 ,  H01M4/5815 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0583

Abstract: To make a pouch format cell, an outermost stack (including a negative electrode and separators positioned on opposed surfaces thereof) is formed. An inner stack is formed, including a positive electrode and a sub-stack (i.e., another negative electrode with separators positioned on opposed surfaces thereof and another positive electrode). The inner stack is positioned on the outermost stack to form a core stack, such that i) one inner stack end substantially aligns with one outermost stack end, ii) another end and a portion of the outermost stack remain exposed, and iii) the inner stack positive electrode is adjacent to one of the outermost stack separators. The outermost stack exposed portion is folded around another inner stack end and to cover a portion of an outer layer of the inner stack. This forms an initial overlay. The core stack is folded around at least a portion of the initial overlay.