公开(公告)号：US11522221B2

公开(公告)日：2022-12-06

申请号：US16725550

申请日：2019-12-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Shuru Chen ,  Mei Cai

IPC: H01M10/0565 ,  H01M10/0525 ,  C08F122/20

Abstract: The present technology relates to gel electrolytes for using in lithium-ion electrochemical cells and methods of forming the same. For example, the method may include adding one or more gelation reagents to an electrochemical cell including one or more liquid electrolyte precursors. The one or more gelation reagents include one or more initiators and one or more crosslinking agents. Each of the one or more initiators may be one of a thermal initiator and an actinic/electron beam initiator. Each of the one or more crosslinking agents may be one of a tridentate alkane and a tetradentate alkane having one or more substitutes including a terminal group represented by:

公开(公告)号：US20220255187A1

公开(公告)日：2022-08-11

申请号：US17172609

申请日：2021-02-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ruchira R. Dharmasena ,  Shuru Chen ,  Fang Dai ,  Mei Cai

IPC: H01M50/403 ,  B05D1/00

Abstract: A method for coating a separator for a battery includes creating an electrostatic field and disposing a substrate material within the electrostatic field. The method further includes applying a coating material to the substrate material in a presence of the electrostatic field and drying the coating material upon the substrate material.

公开(公告)号：US11101501B2

公开(公告)日：2021-08-24

申请号：US16659005

申请日：2019-10-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Fang Liu ,  Qiangfeng Xiao ,  Yunfeng Lu ,  Mei Cai ,  Fang Dai ,  Li Yang

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/42

Abstract: An example electrolyte includes a solvent, a lithium salt, and an additive selected from the group consisting of a mercaptosilane, a mercaptosiloxane, and combinations thereof. The electrolyte may be used in a method for making a solid electrolyte interface (SEI) layer on a surface of an electrode. A negative electrode structure may be formed from the method.

公开(公告)号：US20210184200A1

公开(公告)日：2021-06-17

申请号：US16710793

申请日：2019-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ruchira R. Dharmasena ,  Shuru Chen ,  Fang Dai ,  Mei Cai

IPC: H01M4/04 ,  H01M4/136 ,  C23C14/34

Abstract: A method of applying a homogenous film coating to a constituent particle of component includes setting up a target element in a sputtering chamber. The method also includes arranging a receptacle in the sputtering chamber. The method additionally includes arranging the constituent particle on the receptacle. The method also includes bombarding the target element via energetic particles to eject material from the target element and deposit the material onto the constituent particle. The method further includes agitating the receptacle during the bombarding to apply the material to the constituent particle as the homogenous film coating. The method may be used to apply a homogenous thin film coating to a sulfur-infused constituent particle for a sulfur cathode in a lithium-sulfur battery.

公开(公告)号：US10714756B2

公开(公告)日：2020-07-14

申请号：US15349341

申请日：2016-11-11

Applicant: GM Global Technology Operations LLC

Inventor： Fang Dai ,  Mahmoud H. Abd Elhamid ,  Anne M. Dailly ,  Mei Cai

IPC: H01M10/052 ,  H01M4/66 ,  C25D3/38 ,  C25D3/12 ,  C23C18/16 ,  C25D5/44 ,  C25D3/40 ,  C23C18/54

Abstract: In certain aspects, electrolytic deposition and electroless displacement deposition methods are provided to form bimetallic structures that may be used as a bipolar current collector in a battery or a substrate for forming graphene sheets. In other aspects, bipolar current collectors for lithium-ion based electrochemical cells are provided. The bimetallic current collector may have an aluminum-containing surface and a continuous copper coating. In other aspects, a flexible substrate may be coated with one or more conductive materials, like nickel, copper, graphene, aluminum, alloys, and combinations thereof. The flexible substrate is folded to form a bipolar current collector. New stack assemblies for lithium-ion based batteries incorporating such bipolar current collectors are also provided that can have cells with a tab-free and/or weld-free design.

公开(公告)号：US10707530B2

公开(公告)日：2020-07-07

申请号：US15677389

申请日：2017-08-15

Applicant: GM Global Technology Operations LLC

Inventor： Li Yang ,  Mei Cai ,  Fang Dai ,  Yingnan Dong

IPC: H01M4/02 ,  H01M10/0568 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/052

Abstract: A highly-concentrated electrolyte system for an electrochemical cell is provided, along with methods of making the 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, sodium bis(fluorosulfonyl)imide, potassium bis(fluorosulfonyl)imide, and combinations thereof bound to a solvent comprising one or more solvents selected from the group consisting of: dimethyl carbonate, dimethyl dicarbonate, and combinations thereof. The salts have a concentration in the electrolyte system of greater than or equal to about 4 M. A molar ratio of the salts to the dimethyl carbonate is about 0.5. A molar ratio of the salts to the dimethyl dicarbonate is about 1. The salts binds to the dimethyl carbonate and/or dimethyl dicarbonate causing the electrolyte system to be substantially free of unbound dimethyl carbonate, unbound dimethyl dicarbonate, and unbound bis(fluorosulfonyl)imide.

公开(公告)号：US20190326070A1

公开(公告)日：2019-10-24

申请号：US16453112

申请日：2019-06-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Jingmei Shen ,  Mei Cai ,  Anne M. Dailly

IPC: H01G11/62 ,  H01G11/34 ,  H01M4/62 ,  C01B32/342 ,  H01G11/86 ,  H01G11/24

Abstract: A porous carbon material includes a hierarchical porous structure including a primary microporous structure and at least one of a secondary mesoporous structure and a secondary macroporous structure. The porous carbon material is formed by combining a halogenated-hydrocarbon, an aprotic hydrocarbon solvent, and a reductant to initiate a reaction that forms intermediate particles having a microporous framework; and subjecting the intermediate particles to a heat treatment at a heat treatment temperature ranging from about 300° C. to less than 1,500° C. for a heat treatment time period ranging from about 20 minutes to about 10 hours to thereby form the porous carbon material. The aprotic hydrocarbon solvent is selected from the group consisting of toluene, hexane, cyclohexane, and combinations thereof.

公开(公告)号：US10446884B2

公开(公告)日：2019-10-15

申请号：US15295600

申请日：2016-10-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Martin S. Ruthkosky ,  Fang Dai

IPC: H01M10/48 ,  H01M10/0525

Abstract: An example of a three-electrode test cell includes a negative electrode, a positive electrode having an aperture defined therein, a reference electrode, and a first microporous polymer separator soaked in an electrolyte. The reference electrode is disposed within the aperture of the positive electrode and physically separated from the positive electrode. The first microporous polymer separator is disposed between the negative electrode and the positive electrode.

公开(公告)号：US20190232251A1

公开(公告)日：2019-08-01

申请号：US15880976

申请日：2018-01-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anne M. Dailly ,  Fang Dai ,  Timothy J. Fuller

IPC: B01J20/26 ,  B01J31/16 ,  B01J31/06 ,  B01J35/00 ,  B01J35/02 ,  B01J37/04 ,  B01J37/03 ,  B01J20/22 ,  B01J20/30 ,  B01J20/28 ,  H01M10/0565 ,  H01M10/052 ,  B01D71/36 ,  B01D69/14

Abstract: A method of making a metal organic framework (MOF)-polymer composite material includes forming a homogeneous solution comprising a solvent, a metal salt, a polymer which is soluble in the solvent, and a reactant which can be synthesized to provide an organic linker during formation of a MOF structure, synthesizing the homogeneous solution to crystallize a MOF structure in the homogenous solution to yield the MOF structure distributed in a remainder solution, applying an antisolvent to the remainder solution with the MOF structure distributed in the remainder solution to form a polymer-rich phase, where the MOF structure is integrated into the polymer matrix during forming of the polymer matrix to produce a MOF-polymer composite material. The MOF-polymer composite material can be formed on a substrate to produce a MOF structured object, which can be a membrane, film, or other object.

公开(公告)号：US20190207211A1

公开(公告)日：2019-07-04

申请号：US16131875

申请日：2018-09-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Meinan He ,  Shuru Chen ,  Mei Cai

IPC: H01M4/36 ,  H01M4/48 ,  H01M4/58 ,  H01M4/38 ,  H01M4/66 ,  H01M4/04 ,  H01M10/054 ,  H01M4/134 ,  H01M4/1395

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/0483 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/381 ,  H01M4/483 ,  H01M4/5815 ,  H01M4/661 ,  H01M10/054

Abstract: An electrochemical cell comprising an alkali metal negative electrode layer physically and chemically bonded to a surface of a negative electrode current collector via an intermediate metal chalcogenide layer. The intermediate metal chalcogenide layer may comprise a metal oxide, a metal sulfide, a metal selenide, or a combination thereof. The intermediate metal chalcogenide layer may be formed on the surface of the negative electrode current collector by exposing the surface to a chalcogen or a chalcogen donor compound. Then, the alkali metal negative electrode layer may be formed on the surface of the negative electrode current collector over the intermediate metal chalcogenide layer by contacting at least a portion of the metal chalcogenide layer with a source of sodium or potassium to form a layer of sodium or potassium on the surface of the negative electrode current collector over the metal chalcogenide layer.