公开(公告)号：US20230102190A1

公开(公告)日：2023-03-30

申请号：US17489260

申请日：2021-09-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  BROWN UNIVERSITY

Inventor： Xingcheng XIAO ,  Mark VERBRUGGE ,  Mok Yun JIN ,  Brian W. SHELDON

IPC: H01M4/38 ,  H01M4/04 ,  H01M10/0525

Abstract: Methods for preparing a silicon-based electroactive material for use in an electrochemical cell are provided. The methods include heating a silicon oxide (SiOx, where 0.1≤x≤2) particle to a temperature between about 600° C. and about 1200° C. over a period between about 30 minutes and about 10 hours to form the silicon-based electroactive material, where the silicon-based electroactive material includes a silicon oxide matrix and a plurality of silicon crystallites embedded therein. In certain instances, the heating may occur in an inert atmosphere such that the silicon crystallites are distributed throughout the silicon oxide matrix. In other instances, the heating may occur in a reducing environment such that the silicon crystallites are condensed in one or more regions in the silicon oxide matrix. In each instance, the silicon-based electroactive material may be carbon coated by heating the silicon-based electroactive material in an environment including hydrocarbons.

公开(公告)号：US20220336846A1

公开(公告)日：2022-10-20

申请号：US17230800

申请日：2021-04-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Hongliang WANG

IPC: H01M10/0562 ,  H01M10/54

Abstract: A method for restoring a solid-state electrolyte layer having passivation layers formed on one or more surfaces thereof is provided. The method includes exposing one or more surface regions of the solid-state electrolyte layer by removing the passivation layers using a surface treatment process. The surface treatment process may include heating at least one portion of the passivation layers or an interface between the solid-state electrolyte layer and the passivation layers to a temperature that is at least 5% greater than a decomposition temperature of the passivation layers. The surface treatment process may use be a laser surface treatment process or a plasma surface treatment process. In each instance, the surface treatment process may be a thermal vaporization process and/or may cause volumetric expansion of the passivation layers and/or may cause thermal stress at an interface between the solid-state electrolyte layer and the passivation layers.

公开(公告)号：US20210135230A1

公开(公告)日：2021-05-06

申请号：US16668904

申请日：2019-10-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiagang XU ,  Xingcheng XIAO ,  Robert D. SCHMIDT

IPC: H01M4/62 ,  H01M10/0585 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/0562 ,  H01M4/36

Abstract: Methods of making a solid-state electrochemical cell that cycles lithium ions are provided that include applying a liquid metal composition comprising gallium to a first major surface of either a solid-state electrolyte or a solid electrode (e.g., lithium metal) in the presence of an oxidant and in an environment substantially free of water to reduce surface tension of the liquid metal composition so that it forms a continuous layer over the first major surface. The first major surface having the continuous layer of liquid metal composition is contacted with a second major surface to form a continuous interfacial layer between the solid-state electrolyte and the solid electrode. Solid-state electrochemical cells formed by such methods are also provided, where the metal composition comprising gallium is a liquid in a temperature range of greater than or equal to about 20° C. to less than or equal to about 30° C.

公开(公告)号：US20210083294A1

公开(公告)日：2021-03-18

申请号：US16573605

申请日：2019-09-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Jin LIU ,  Jiagang XU ,  Mei CAI ,  Sherman H. ZENG

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/60 ,  H01M4/131 ,  H01M4/137 ,  H01M4/1391 ,  H01M4/1399

Abstract: An electrode including an electrode active material and a ceramic hydrofluoric acid (HF) scavenger is provided. The ceramic hydrofluoric acid (HF) scavenger includes M2SiO3, MAlO2, M2O—Al2O3—SiO2, or combinations thereof, where M is lithium (Li), sodium (Na), or combinations thereof. Methods of making the electrode are also provided.

公开(公告)号：US20200220172A1

公开(公告)日：2020-07-09

申请号：US16243969

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Li YANG ,  Gayatri V. DADHEECH ,  Gongshin QI ,  Mark W. VERBRUGGE ,  Sherman H. ZENG

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/44

Abstract: A rechargeable lithium-ion battery is provided that includes a positive electrode with a positive electroactive material that in a charged state includes lithium iron (II) orthosilicate (Li2FeSiO4) and in a discharged state includes FeSiO4 or LiFeSiO4. A negative electrode includes phosphorene. A separator is disposed between the positive and negative electrodes. An electrolyte has an organic solvent especially containing ether-based organic solvents and a lithium salt that provides a conductive medium for lithium ions to transfer between the positive electrode and the negative electrode. Such a rechargeable lithium-ion battery provides advantageous power delivery, long driving ranges, and fast charge to enhance widespread use of batteries, especially in vehicles. Furthermore, lithium plating can be minimized or avoided, even at low temperature charging. Methods of recharging a rechargeable lithium-ion battery at low temperatures are also provided.

公开(公告)号：US20200212446A1

公开(公告)日：2020-07-02

申请号：US16234873

申请日：2018-12-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  BROWN UNIVERSITY

Inventor： Xingcheng XIAO ,  Binsong LI ,  Huajian GAO ,  Kai GUO

IPC: H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M4/38 ,  H01M4/04 ,  H01M4/1395 ,  H01M4/134

Abstract: Double-layered protective coatings for lithium metal electrodes, as well as methods of formation relating thereto, are provided. The negative electrode assembly includes an electroactive material layer including lithium metal and a protective dual-layered coating. The protective dual-layered coating includes a polymeric layer disposed on a surface of the electroactive material layer and an inorganic layer disposed on an exposed surface of the polymeric layer. The polymeric layer has an elastic modulus of greater than or equal to about 0.01 GPa to less than or equal to about 410 GPa. The inorganic layer has an elastic modulus of greater than or equal to about 10 GPa to less than or equal to about 1000 GPa.

公开(公告)号：US20180248182A1

公开(公告)日：2018-08-30

申请号：US15964179

申请日：2018-04-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. DADHEECH ,  Xingcheng XIAO ,  Mei CAI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/13

CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/38 ,  H01M4/624 ,  H01M4/625 ,  H01M10/052

Abstract: In an example of a method for making a sulfur-based positive electrode active material, a carbon layer is formed on a sacrificial nanomaterial. The carbon layer is coated with titanium dioxide to form a titanium dioxide layer. The sacrificial nanomaterial is removed to form a hollow material including a hollow core surrounded by a carbon and titanium dioxide double shell. Sulfur is impregnated into the hollow core.

公开(公告)号：US20240021787A1

公开(公告)日：2024-01-18

申请号：US17864279

申请日：2022-07-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mei CAI ,  Yifan ZHAO

IPC: H01M4/36 ,  H01M4/58 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/491 ,  H01M50/434 ,  H01M50/443

CPC classification number: H01M4/364 ,  H01M4/5825 ,  H01M4/366 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/491 ,  H01M50/434 ,  H01M50/443 ,  H01M2004/021

Abstract: A hybrid functional particle for use in an electrochemical cell that cycle lithium ions is provided. The hybrid functional particle includes a lithiated zeolite having a plurality of pores and a plurality of lithium-containing particles disposed within one or more pores of the plurality of pores of the lithiated zeolite. For example, the lithiated zeolite has a porosity ranging from about 10 vol. % to about 90 vol. %, and the lithium-containing particles can fill an amount ranging from about 1% to about 100% of a total porosity of the lithiated zeolite. The electrochemical cell includes first and second electrodes separated by a separating layer, and the hybrid functional particle may be disposed within one or both of the electrodes, coated on one or more sides of one or both of the electrodes, disposed within the separating layer, and/or coated on one or more surfaces of the separating layer.

公开(公告)号：US20230246241A1

公开(公告)日：2023-08-03

申请号：US17579144

申请日：2022-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jung Hwi CHO ,  Aijie CHEN ,  Xingcheng XIAO ,  Mei CAI

IPC: H01M10/058 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/04

CPC classification number: H01M10/058 ,  H01M4/134 ,  H01M4/0445 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2300/0068

Abstract: A method for forming a solid-state battery includes preparing a cell, heating the cell to a first temperature, and cycling the cell while maintaining the cell at the first temperature and/or while the cell is cooled to room temperature from the first temperature. The cell includes a solid-state electrolyte adjacent to a negative electrode, including a negative electroactive material selected from the group consisting of: lithium metal, lithium alloys, silicon, silicon alloys, and combinations thereof. The first temperature is between about 50° C. and about 175° C. The cell is cycled for between about 1 cycle and about 10 cycles, where current densities are between about 0.01 mA/cm2 and about 10 mA/cm2, and capacity per cycle between about 0.01 mAh/cm2 and about 1 mAh/cm2.

公开(公告)号：US20220344700A1

公开(公告)日：2022-10-27

申请号：US17230788

申请日：2021-04-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mengyuan CHEN

IPC: H01M10/0562 ,  H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M4/583 ,  H01M4/04

Abstract: The present disclosure provides a method for forming an ionically conductive polymer composite interlayer. The method may include forming a precursor layer between a first surface of an electroactive material layer and a first surface of a solid-state electrolyte layer and converting the precursor layer to the ionically conductive polymer composite interlayer. The at least one of the electroactive material layer or solid-state electrolyte may include lithium. The first surface of the electroactive material layer and the first surface of the solid-state electrolyte layer may be substantially parallel. The precursor layer may include one or more fluoropolymers comprising carbon and fluorine. The ionically conductive polymer composite layer may have an ionic conductivity greater than or equal to about 1.0×10−8 S·cm−1 to less than or equal to about 1.0 S·cm−1 and may include a lithium fluoride embedded in a carbonaceous matrix.