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：US11289745B2

公开(公告)日：2022-03-29

申请号：US16243517

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Li Yang ,  Xingcheng Xiao ,  Gongshin Qi ,  Vijay P. Saharan

IPC: H01M10/52 ,  B01J37/02 ,  B01J29/068 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/62 ,  H01M10/42

Abstract: A lithium ion battery is provided that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. One or more of the separator, positive electrode, and negative electrode includes a transition metal compound capable of catalyzing any gaseous reactants formed in the lithium ion battery to form a liquid. The transition metal compound may include ruthenium (Ru). In certain variations, the lithium ion battery includes an electrolyte that is a conductive medium for lithium ions to move between the positive electrode and the negative electrode. The electrolyte comprises a transition metal compound capable of catalyzing a reaction of any gaseous reactants to form a liquid.

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.

公开(公告)号：US10903491B2

公开(公告)日：2021-01-26

申请号：US16243969

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng Xiao ,  Li Yang ,  Gayatri V. Dadheech ,  Gongshin Qi ,  Mark W. Verbrugge ,  Sherman H. Zeng

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/44

Abstract: A rechargeable lithium-ion battery disclosed herein comprises a positive electrode with a positive electroactive material that in a charged state comprises lithium iron (II) orthosilicate (Li2FeSiO4) and in a discharged state comprises FeSiO4 or LiFeSiO4. A negative electrode comprises phosphorene. A separator is disposed between the positive electrode and the negative electrode. An electrolyte has an organic solvent especially containing ether-based organic solvents and a lithium salt that provides a conductive medium for lithium ions to transfer between the positive electrode and the negative electrode. Such a rechargeable lithium-ion battery provides advantageous power delivery, long driving ranges, and fast charge to enhance widespread use of batteries, especially in vehicles. Furthermore, lithium plating can be minimized or avoided, even at low temperature charging. Methods of recharging a rechargeable lithium-ion battery at low temperatures are also disclosed.

公开(公告)号：US20200153046A1

公开(公告)日：2020-05-14

申请号：US16188733

申请日：2018-11-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ning Kang ,  Li Yang ,  Mei Cai

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/136

Abstract: Provided are 1,3-dimethoxypropane (DMP)-containing battery electrolytes, and lithium ion batteries utilizing the same. The batteries comprise an electrolyte including DMP, a lithium anode disposed within the electrolyte, and a cathode disposed within the electrolyte. The cathode can comprise a lithium metal oxide or a chalcogen material. The lithium metal oxide can be LiNixCoyMnzO2 or lithium iron phosphate. The chalcogen material can include sulfur and/or selenium. The electrolyte can include one or more co-solvents including tetrahydrofuran, 2-methyltetrahydrofuran and 1,3-dioxolane. The electrolyte can include one or more lithium salts, including LiClO4, LiAlCl4, LiI, LiBr, LiSCN, LiBF4, LiB(C6H5)4LiAsF6, LiCF3SO3, LiN(CF3SO2)2, and LiPF6.

公开(公告)号：US10573879B2

公开(公告)日：2020-02-25

申请号：US15115870

申请日：2015-02-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Qiangfeng Xiao ,  Mei Cai ,  Meng Jiang ,  Xingcheng Xiao

IPC: H01M4/04 ,  H01M4/38 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/134 ,  H01M10/052 ,  H01M10/0567 ,  H01M4/1395 ,  H01M10/0525

Abstract: In an example of a method for enhancing the performance of a silicon-based negative electrode, the silicon-based negative electrode is pre-lithiated in an electrolyte including a lithium salt dissolved in a solvent mixture of dimethoxyethane (DME) and fluoroethylene carbonate (FEC). The DME and FEC are present in a volume to volume ratio ranging from 10 to 1 to 1 to 10. The pre-lithiation forms a stable solid electrolyte interface layer on an exposed surface of the negative electrode.

公开(公告)号：US10511049B2

公开(公告)日：2019-12-17

申请号：US15677249

申请日：2017-08-15

Applicant: GM Global Technology Operations LLC

Inventor： Li Yang ,  Mei Cai

IPC: H01M10/0525 ,  H01M10/0569

Abstract: A highly-concentrated electrolyte system for an electrochemical cell is provided, along with methods of making the highly-concentrated electrolyte system. The electrolyte system includes a bound moiety having an ionization potential greater than an electron affinity and comprising one or more salts selected from the group consisting of: lithium bis(fluorosulfonyl)imide (LiFSI), sodium bis(fluorosulfonyl)imide (NaFSI), potassium bis(fluorosulfonyl)imide (KFSI), and combinations thereof bound to a solvent comprising dimethoxyethane (DME). The one or more salts have a concentration in the electrolyte system of greater than about 4M, and a molar ratio of the one or more salts to the dimethoxyethane (DME) is greater than or equal to about 1 to less than or equal to about 1.5. The one or more salts binds to the dimethoxyethane (DME) causing the electrolyte system to be substantially free of unbound dimethoxyethane (DME) and unbound bis(fluorosulfonyl)imide (FSI−).

公开(公告)号：US20190288273A1

公开(公告)日：2019-09-19

申请号：US15924980

申请日：2018-03-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mark W. Verbrugge ,  Mei Cai ,  Meng Jiang

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/0563

Abstract: A method of making an electrochemical cell comprising a silicon-containing anode includes forming a first electrochemical cell comprising the silicon-containing anode and a first electrolyte system, pre-lithiating the silicon-containing anode to produce a pre-lithiated anode in the first electrochemical cell, and forming a second electrochemical cell including the pre-lithiated anode and a second electrolyte system. The first electrolyte system includes a fluorinated solvent in an amount greater than 5 wt % and a first salt; and the second electrolyte system includes a hydrocarbon and a second salt. Forming the second electrochemical cell may include removing the first electrolyte system from the first electrochemical cell and introducing the second electrolyte to the emptied first electrochemical cell; or removing the pre-lithiated anode from the first electrochemical cell and constructing the second electrochemical cell with the pre-lithiated anode and the second electrolyte system.

公开(公告)号：US10388959B2

公开(公告)日：2019-08-20

申请号：US15623457

申请日：2017-06-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yingnan Dong ,  Mei Cai ,  Li Yang ,  Xiaosong Huang

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/66

Abstract: In the formation of cathodes for lithium-sulfur battery cells, it is often desired to form the cathodes by resin-bonding particles of a sulfur-based cathode material as a porous cathode material layer on the surface(s) of a suitable metal current collector. It is found that the use of a copolymer of polyethylene oxide and polyvinyl alcohol, dissolved in water, provides a resin-particle slurry that is readily spreadable onto the current collector surface to form a uniform layer of porous cathode material particles. And upon evaporation of the water, the copolymer-bonded, sulfur-based particle coated cathodes function very well in assembled lithium-sulfur cells.

公开(公告)号：US10312501B2

公开(公告)日：2019-06-04

申请号：US14954181

申请日：2015-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Fang Dai ,  Qiangfeng Xiao ,  Mark W. Verbrugge

IPC: H01M4/04 ,  H01M10/0568 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/36 ,  H01M10/052 ,  H01M10/0562

Abstract: An example electrolyte includes a solvent, a lithium salt, and an additive selected from the group consisting of a silane with at least one Si—H group; a fluorinated methoxysilane; a fluorinated chlorosilane; and combinations thereof. The electrolyte may be used in a method for making a solid electrolyte interface (SEI) layer on a surface of a lithium electrode. A negative electrode structure may be formed from the method.