公开(公告)号：US20220140324A1

公开(公告)日：2022-05-05

申请号：US17085785

申请日：2020-10-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Nicole ELLISON ,  Xiaosong HUANG ,  Lei WANG ,  Xingyi YANG

IPC: H01M4/38 ,  H01M4/133 ,  H01M4/62 ,  H01M4/134 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/1393 ,  H01M4/1391 ,  H01M4/04

Abstract: A negative electrode is provided herein as well as methods for preparing negative electrodes and electrochemical cells including the negative electrode. The negative electrode includes a first electroactive material, an electrically conductive material, and a polymeric binder. The first electroactive material includes silicon-containing particles having an average particle diameter of at least about 1 μm, and the electrically conductive material includes graphene nanoplatelets. The polymeric binder includes a polyimide, a polyamide, polyacrylonitrile, polyacrylic acid, a salt of polyacrylic acid, polyacrylamide, polyvinyl alcohol, carboxymethyl cellulose, or a combination thereof

公开(公告)号：US20220238911A1

公开(公告)日：2022-07-28

申请号：US17158751

申请日：2021-01-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingyi YANG ,  Michael P. BALOGH ,  Xingcheng XIAO ,  Joel G. TONER

IPC: H01M10/0562 ,  H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38

Abstract: An electrolyte composition for electrochemical cells including a silicon-containing electrode is provided herein as well as electrochemical cells including the electrolyte composition. The electrolyte composition includes a lithium salt, fluoroethylene carbonate (FEC), a linear carbonate, vinylene carbonate, and a fluorosilane additive. The FEC and the linear carbonate are present in the electrolyte composition in a ratio of about 1:3 v/v to about 1:9 v/v.

公开(公告)号：US20220102704A1

公开(公告)日：2022-03-31

申请号：US17039034

申请日：2020-09-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mark W. VERBRUGGE ,  Xingcheng XIAO ,  Qinglin ZHANG ,  Xingyi YANG ,  Raghunathan K

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

Abstract: The present disclosure relates to a negative electrode material and methods of preparation and use relating thereto. The electrode material comprises a plurality of electroactive material particles, where each electroactive material particle includes an electroactive material core and an electronically conductive coating. The method includes contacting an electroactive material precursor including a plurality of electroactive material particles with a solution so as to form an electronically conductive coating on each of the electroactive material particles. The solution includes a solvent and one or more of copper fluoride (CuF2), titanium tetrafluoride (TiF3 or TiF4), iron fluoride (FeF3), nickel fluoride (NiF2), manganese fluoride (MnF2, MnF3, or MnF4), and vanadium fluoride (VF3, VF4, VF5). The electronically conductive coating includes a plurality of first regions and a plurality of second regions. The plurality of first regions include lithium fluoride. The plurality of second regions include one of copper, titanium, iron, nickel, manganese, and vanadium.

公开(公告)号：US20220102725A1

公开(公告)日：2022-03-31

申请号：US17039366

申请日：2020-09-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mark W. VERBRUGGE ,  Xingyi YANG ,  Lei WANG ,  Raghunathan K.

IPC: H01M4/58 ,  H01M10/0525 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/1397 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/62

Abstract: An electrochemical cell is provided herein as well as methods for preparing electrochemical cells. The electrochemical cell includes a negative electrode and a positive electrode. The negative electrode includes a prelithiated electroactive material including a lithium silicide. Lithium is present in the prelithiated electroactive material in an amount corresponding to greater than or equal to about 10% of a state of charge of the negative electrode. The electrochemical cell has a negative electrode capacity to positive electrode capacity for lithium (N/P) ratio of greater than or equal to about 1, and the electrochemical cell is capable of operating at an operating voltage of less than or equal to about 5 volts.

公开(公告)号：US20210234153A1

公开(公告)日：2021-07-29

申请号：US16752192

申请日：2020-01-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Xingyi YANG ,  Raghunathan K ,  Mark W. VERBRUGGE

IPC: H01M4/139 ,  H01M4/04 ,  H01M4/62 ,  C23C16/40 ,  C23C16/455 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A method of making an electrode material for an electrode in an electrochemical cell that cycles lithium ions is provided, where a protective coating is applied to an electrode precursor material. The electrode precursor may be a silicon-containing composition. The protective coating is selected from the group consisting of: an oxide-based coating, a fluoride-based coating, and a nitride-based coating. The method also includes lithiating the electrode precursor material in a continuous process. The continuous process is conducted in a reactor having a first reaction chamber and a second reaction chamber to form a lithiated electrode material comprising the protective coating.

公开(公告)号：US20210151787A1

公开(公告)日：2021-05-20

申请号：US16689748

申请日：2019-11-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Xingyi YANG ,  Mark W. VERBRUGGE ,  Raghunathan K ,  Qinglin ZHANG

IPC: H01M10/0525 ,  H01M4/485 ,  H01M10/0562 ,  H01M4/525 ,  C01G53/00

Abstract: Lithiated electrodes, electrochemical cells including lithiated electrodes, and methods of making the same are provided. The method includes lithiating at least one electrode in an electrochemical cell by applying current across a first current collector of the at least one electrode to a second current collector of an auxiliary electrode. The electrochemical cell may be disposed within a battery packaging and the auxiliary electrode may be disposed within the battery packaging adjacent to an edge of the electrochemical cell. The at least one electrode may include a first electroactive layer disposed on or near one or more surfaces of the first current collector, and the auxiliary electrode may include a second electroactive layer disposed at or near one or more surfaces of the second current collector. The method may further include extracting the auxiliary electrode from the battery packaging and sealing the battery packaging, which includes the pre-lithiated electrochemical cell.