公开(公告)号：US20240030405A1

公开(公告)日：2024-01-25

申请号：US17869389

申请日：2022-07-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meixian WANG ,  Michael P. BALOGH ,  Ion C. HALALAY ,  Insun YOON

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/587

CPC classification number: H01M4/364 ,  H01M4/485 ,  H01M4/587 ,  H01M2004/021

Abstract: The present disclosure provides a composite electrode for an electrochemical cell that cycles lithium ions. The composite electrode includes a first electroactive material having a first specific capacity and a first average particle size, and a second electroactive material having a second specific capacity and a second average particle size. The first specific capacity is larger than the second specific capacity. For example, the first specific capacity can be greater than or equal to about 1,000 mAh/g to less than or equal to about 3,600 mAh/g, and the second specific capacity greater than or equal to about 250 mAh/g to less than or equal to about 400 mAh/g. The second average particle size is comparable with the first average particle size. For example, the second average particle can be no less than half the first average particle size and no greater than twice the first average particle size.

公开(公告)号：US20200259174A1

公开(公告)日：2020-08-13

申请号：US16275040

申请日：2019-02-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael P. BALOGH ,  Ion C. HALALAY

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/0525 ,  H01M4/62 ,  C22C1/05

Abstract: Methods for pre-lithiating an electroactive material including a Group III element, Group IV element, a Group V element, or a combination thereof for an electrode for an electrochemical cell are provided as well as electrodes including the pre-lithiated electroactive material. The methods include reacting a lithiating agent including LiH or Li3N with the electroactive material to form a pre-lithiated electroactive material.

公开(公告)号：US20240120486A1

公开(公告)日：2024-04-11

申请号：US17954896

申请日：2022-09-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Insun YOON ,  Meixian WANG ,  Ion C. HALALAY

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M10/0525 ,  H01M50/46

CPC classification number: H01M4/622 ,  H01M4/364 ,  H01M4/386 ,  H01M4/583 ,  H01M10/0525 ,  H01M50/46 ,  H01M2004/027

Abstract: An electrochemical cell may include a first electrode that includes a positive electroactive material, a second electrode that includes a negative electroactive material and a polyacrylate binder, and a separating layer disposed between the first and second electrodes. The polyacrylate binder has a molecular weight greater than or equal to about 250,000 mol/g to less than or equal to about 500,000 mol/g. The second electrode is prepared by disposing an electrode forming slurry having a temperature greater than or equal to about 4° C. to less than or equal to about 15° C. one or near a surface of a current collector. The electrode forming slurry includes the negative electroactive material and the polyacrylate binder. The negative electroactive material can be a silicon-containing material.

公开(公告)号：US20240106072A1

公开(公告)日：2024-03-28

申请号：US17955151

申请日：2022-09-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas A. YERSAK ,  Ion C. HALALAY ,  Yubin ZHANG

IPC: H01M50/446 ,  H01M10/0525 ,  H01M10/0562 ,  H01M50/406 ,  H01M50/417 ,  H01M50/423 ,  H01M50/437 ,  H01M50/491 ,  H01M50/497

CPC classification number: H01M50/446 ,  H01M10/0525 ,  H01M10/0562 ,  H01M50/406 ,  H01M50/417 ,  H01M50/423 ,  H01M50/437 ,  H01M50/491 ,  H01M50/497 ,  H01M2300/008

Abstract: A bicontinuous separating layer include a separating matrix having pores and a solid-state electrolyte disposed in the pores of the separating matrix. In certain variations, the bicontinuous separating layer is prepared by contacting a solid-state electrolyte liquid-state precursor with the separating matrix and heating the infiltrated separating matrix to a temperature between about 25° C. and about 300° C. The solid-state electrolyte liquid-state precursor includes a solvent and a solid-state electrolyte powder or a solid-state electrolyte precursor. In other variations, the bicontinuous separating layer may be prepared by contacting a solid-state electrolyte powder with a separating matrix to form a physical mixture and heating the physical mixture to a temperature between about 240° C. and about 500° C., where the separating matrix is defined by a polymer having a melting temperature greater than about 215° C., and the solid-state electrolyte has a melting temperature greater than about 300° C.