公开(公告)号：US20230155133A1

公开(公告)日：2023-05-18

申请号：US17525096

申请日：2021-11-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Kanako Okada ,  Jesse M. Roy ,  Li Yang ,  Mary E. Fortier

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/628 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/0402 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M2300/0025

Abstract: A negative electrode for an electrochemical cell of a secondary lithium metal battery is manufactured by a method in which a precursor solution is applied to a major surface of a lithium metal substrate to form a protective interfacial layer thereon. The precursor solution includes a first organic solvent mixture, a dioxolane, and a fluorinated organosilane. The protective interfacial layer exhibits a composite structure including a polymeric matrix component and a lithium-containing dispersed component embedded in the polymeric matrix component.

公开(公告)号：US20210408605A1

公开(公告)日：2021-12-30

申请号：US16910174

申请日：2020-06-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Bing Tan ,  Umamaheswari Viswanathan ,  Mary E. Fortier

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0525 ,  B60L50/60

Abstract: Presented are electrolyte compositions with fluorinated cosolvents, methods for making/using such electrolyte compositions, and electric-drive vehicles with lithium-ion battery cells using such electrolyte compositions. An electrolyte composition for a lithium-ion electrochemical device includes a lithium salt, a nonaqueous solvent, and a fluorinated cosolvent. The lithium salt may include one or more soluble ionic salts, whereas the solvent may include one or more non-aqueous organic solvents. The fluorinated cosolvent includes a cyclic carbonate with a fluorine atom that is bonded directly to the cyclic ring, to a single atom bonded to the cyclic ring, or to a single side chain group bonded to the cyclic ring. The fluorinated cosolvent may be a fluoroethylene carbonate, a difluoroethylene carbonate, a trifluoropropylene carbonate, or a difluoropropylene carbonate. The side chain group may be an R-group, such as a 3-C chain, with at least one carbon atom bonded directly to the cyclic ring.

公开(公告)号：US20210234198A1

公开(公告)日：2021-07-29

申请号：US16776163

申请日：2020-01-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meinan HE ,  Mei Cai ,  Li Yang ,  Mary E. Fortier ,  Kely Markley

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M4/583 ,  H01M10/0525

Abstract: The present disclosure provides an electrolyte system for an electrode having a loading density of greater than or equal to about 4.0 mAh/cm2. The electrolyte system may include greater than or equal to about 1.0 M to less than or equal to about 1.5 M of lithium fluorosulfonylimide (LiN(FSO2)2) (LiFSI); less than or equal to about 0.5 M of lithium hexafluorophosphate (LiPF6); and one or more solvents comprising ethylene carbonate (EC), where the electrolyte includes less than or equal to about 30 wt. % of ethylene carbonate (EC). The electrolyte system may also include one or more electrolyte additives selected from corrosion-resistant additives, formation additives, and stabilizer additives. The formation additives and/or stabilizer additive may assist in the formation and maintenance of a solid electrolyte interface layer on one or more surfaces of the graphite-containing electrode.

公开(公告)号：US11646450B2

公开(公告)日：2023-05-09

申请号：US17084075

申请日：2020-10-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Umamaheswari Viswanathan ,  Mary E. Fortier

IPC: H01M10/00 ,  H01M10/0569 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M10/0567 ,  H01M2300/0037 ,  H01M2300/0051

Abstract: An electrolyte is provided. The electrolyte includes a solvent containing propylene carbonate (PC); a lithium salt dissolved in the solvent; a first additive dissolved in the solvent, the first additive being configured to stabilize an anode solid electrolyte interphase; a second additive dissolved in the solvent, the second additive being configured to stabilize at least one of an anode, a cathode, or the lithium salt; and a third additive dissolved in the solvent, the third additive being configured to stabilize at least one of an anode, a cathode, or the lithium salt. The first, second, and third additives are chemically distinct. Electrochemical cells including the electrolyte are also provided.

公开(公告)号：US11637285B2

公开(公告)日：2023-04-25

申请号：US17062358

申请日：2020-10-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mary E. Fortier ,  Bing Tan ,  Li Yang ,  Umamaheswari Viswanathan ,  Vijay P. Saharan ,  Sherman H. Zeng

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/02

Abstract: The present disclosure relates to over-lithiated positive electroactive materials for use within an electrochemical cell. For example, the electrochemical cell includes a positive electrode that includes an over-lithiated positive electroactive material that includes one of LixMn2O4 (where 1.05≤x≤1.30) and LiMn(2−x)NixO4 (where 0≤x≤0.5). The electrochemical cell can include a negative electrode that includes a silicon-containing negative electroactive material having a Columbic Efficiency greater than or equal to about 80% and less than or equal to about 90%.

公开(公告)号：US20220399574A1

公开(公告)日：2022-12-15

申请号：US17304134

申请日：2021-06-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Umamaheswari Viswanathan ,  Li Yang ,  Vijay P. Saharan ,  Mary E. Fortier

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568

Abstract: An electrolyte solution for a lithium metal battery is provided. The electrolyte solution includes lithium bis(fluorosulfonyl)imide dissolved in a fluorinated ether solvent. The electrolyte solution further includes a first additive including fluoroethylene carbonate and a second additive including lithium difluorophosphate. In one embodiment, the fluorinated ether solvent includes fluorinated 1,4 dimethoxy butane.

公开(公告)号：US20210408524A1

公开(公告)日：2021-12-30

申请号：US16912177

申请日：2020-06-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mary E. Fortier ,  Bing Tan ,  Li Yang ,  Uma Viswanathan ,  Vijay P. Saharan ,  Sherman H. Zeng

IPC: H01M4/136 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/62 ,  B60L50/60 ,  B60K1/04

Abstract: A lithium ion batteries and electric vehicles including lithium ion batteries are provided. An exemplary lithium ion battery includes a cathode including a cathode active material comprising at least 50 wt. %, based on a total weight of the cathode active material, of LiFexMn(1-x)PO4, wherein X is from 0.01 to 0.5.