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：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：US20250167365A1

公开(公告)日：2025-05-22

申请号：US18514429

申请日：2023-11-20

Applicant: GM Global Technology Operations LLC

Inventor： Nikhil Mone ,  Srikant Karunakaran Nambiar ,  Umamaheswari Viswanathan ,  Subrahmanyam Goriparti ,  Raghavendra Keerthi Manda ,  Suryanarayana Kolluri

IPC: H01M50/242 ,  H01M50/249

Abstract: A battery cell includes a cell can having a base, a plurality of side walls connected to the base, the base and the plurality of side walls defining a cell stack receiving zone. A battery cell stack arranged in the battery stack receiving zone. A resilient expansion limiter is arranged at one of the plurality of side walls in the cell stack receiving zone. The resilient expansion limiter controlling expansion of the battery cell stack.

公开(公告)号：US20230155174A1

公开(公告)日：2023-05-18

申请号：US17525115

申请日：2021-11-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Seung-Woo Chu ,  Li Yang ,  Umamaheswari Viswanathan ,  Mary E Fortier

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

CPC classification number: H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  H01M2300/0028

Abstract: An electrolyte for a lithium metal battery includes a nonaqueous aprotic organic solvent, a lithium salt dissolved in the nonaqueous aprotic organic solvent and, by volume, from 1% to 10% of a flame retardant additive. The flame retardant additive is at least one of an organophosphate compound, an organophosphite compound, organophosphonate compound, or a phosphazene compound.

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%.