公开(公告)号：US20240250234A1

公开(公告)日：2024-07-25

申请号：US18100911

申请日：2023-01-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Caleb Reese ,  Sayed Youssef Sayed Nagy ,  Joel G. Toner ,  Jeffrey David Cain ,  Xingcheng Xiao

IPC: H01M4/04 ,  H01M4/13 ,  H01M4/38

CPC classification number: H01M4/0435 ,  H01M4/0407 ,  H01M4/13 ,  H01M4/382

Abstract: A pressing machine includes pressing devices, actuators and a control module. At least one of the pressing devices includes a surface having a fluoropolymer material. At least one of the actuators is configured to adjust pressure of the pressing devices on one or more lithium foils, such that the surface presses against one of the one or more lithium foils to form a protective layer. The control module is configured to control the at least one of the actuators to adjust a parameter to control at least one of thickness of the protective layer and fluoride content of the protective layer.

公开(公告)号：US11978880B2

公开(公告)日：2024-05-07

申请号：US17335972

申请日：2021-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jeffrey David Cain ,  Thomas E. Moylan ,  Leng Mao ,  Paul Taichiang Yu ,  Nicholas Paul William Pieczonka ,  Andrew Clay Bobel

IPC: H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0562

CPC classification number: H01M4/0409 ,  H01M4/0404 ,  H01M4/366 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2300/0065

Abstract: A method for forming a layered anode material includes contacting a precursor material and a first electrolyte. The precursor material is a layered ionic compound represented by MX2, where M is one of calcium and magnesium and X is one of silicon, germanium, and boron. The method further includes applying a first bias and/or current as the precursor material contacts the first electrolyte to remove cations from the precursor material to create a two-dimensional structure that defines the layered anode material. In certain variations, the method further includes contacting the two-dimensional structure and a second electrolyte and applying a second bias and/or current as the two-dimensional structure contacts the second electrolyte so as to cause lithium ions to move into interlayer spaces or voids created in the two-dimensional structure by the removal of the cations thereby forming the layered anode material.

公开(公告)号：US12034144B2

公开(公告)日：2024-07-09

申请号：US17486378

申请日：2021-09-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Paul Taichiang Yu ,  Leng Mao ,  Jeffrey David Cain ,  Andrew Clay Bobel

IPC: H01M4/00 ,  H01M4/04 ,  H01M4/02

CPC classification number: H01M4/049 ,  H01M2004/027

Abstract: A method for forming a prelithiated, layered anode material includes contacting an ionic compound and a lithium precursor in an environment having a temperature ranging from about 200° C. to about 900° C. The ionic compound is a three-dimensional layered material represented by MX2, where M is one of calcium (Ca) and magnesium (Mg) and X is one of silicon (Si), germanium (Ge), and boron (B). The lithium precursor is selected from the group consisting of: LiH, LiC, LiOH, LiCl, and combinations thereof. The contacting of the ionic compound and the lithium precursor in the environment causes removal of cations from the ionic compound to create openings in interlayer spaces or voids in the three-dimensional layered material thereby defining a two-dimensional layered material and also causes introduction of lithium ions from the lithium precursor into the interlayer spaces or voids to form the prelithiated, layered anode material.

公开(公告)号：US20250062319A1

公开(公告)日：2025-02-20

申请号：US18449261

申请日：2023-08-14

Applicant: GM Global Technology Operations LLC

Inventor： Jeffrey David Cain ,  Nicholas Paul William Pieczonka ,  Sayed Youssef Sayed Nagy ,  Zachary Hood ,  Shiba Adhikari

IPC: H01M4/36 ,  C25D7/00 ,  C25D9/02 ,  C25D9/04 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42

Abstract: A method is provided for pre-forming anode particles for use in lithium ion batteries. The pre-formed anode particles bear a solid electrolyte of a composition that cannot be formed in situ in the battery. The method includes providing a dispersion of anode precursor particles and an additive not found in the battery in a liquid electrolyte solution. Applying a voltage or current across the dispersion forms the solid electrolyte interphase, on the particles. These particles can be used in an electrode of a lithium ion battery.

公开(公告)号：US20230261173A1

公开(公告)日：2023-08-17

申请号：US17673437

申请日：2022-02-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Caleb REESE ,  Leng MAO ,  Andrew Clay BOBEL ,  Jeffrey David Cain

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

CPC classification number: H01M4/134 ,  H01M10/0525 ,  H01M4/382 ,  H01M4/0492 ,  H01M4/044 ,  H01M2004/021

Abstract: An electrode including an electrochemical layer defining a surface having a plurality of dimples formed thereon is provided. The dimples have an average lateral size greater than or equal to about 100 nm to less than or equal to about 100 μm, and an average depth greater than or equal to about 100 nm to less than or equal to about 50 μm. In certain variations, the dimples are formed in situ by applying a current to the electrochemical layer. In other variations, the dimples are formed by moving a roller having a plurality of shapes defined thereon along one or more surfaces of the electrochemical layer. In still other variations, the dimples are formed by contacting one or more surfaces of the electrochemical layer with a chemical etchant.