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：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：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.