公开(公告)号：US20230231135A1

公开(公告)日：2023-07-20

申请号：US17578169

申请日：2022-01-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yifan ZHAO ,  Xingcheng XIAO ,  Shuru CHEN ,  Mei CAI

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/62 ,  H01M4/366 ,  H01M4/382 ,  H01M10/0525 ,  H01M2004/021

Abstract: An electrode includes an electroactive material layer and a protective layer disposed on or adjacent to a surface of the electroactive material layer. The protective layer includes a polymerized cyclic ether and a salt dispersed therewithin. The salt includes a nitrate salt and a phosphate salt. The salt may also include a Lewis acid salt. The protective layer is formed by disposing a solution, including the salt and solvent, on or adjacent to the surface of the electroactive material layer, and polymerizing the solvent. The solvent includes the cyclic ether, and also, one or more organic phosphates.

公开(公告)号：US20230064146A1

公开(公告)日：2023-03-02

申请号：US17412895

申请日：2021-08-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shuru CHEN ,  Meinan HE ,  Fang DAI ,  Mark VERBRUGGE ,  Mei CAI

IPC: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38 ,  H01M4/58

Abstract: The present disclosure provides an electrolyte system for an electrochemical cell that cycles lithium ions. The electrolyte system may include an aliphatic fluorinated disulfonimide lithium salt in a mixture of organic solvents. The mixture of organic solvents may include a first solvent and a second solvent. The first solvent may include an ether solvent, a carbonate solvent, or a mixture of ether and carbonate solvents. The second solvent may include a fluorinated ether. A molar ratio of the aliphatic fluorinated disulfonimide lithium salt to the first solvent may be greater than or equal to about 1:1.2 to less than or equal to about 1:2. A molar ratio of the first solvent to the second solvent may be greater than or equal to about 1:1 to less than or equal to about 1:4.

公开(公告)号：US20210194054A1

公开(公告)日：2021-06-24

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：US20230194242A1

公开(公告)日：2023-06-22

申请号：US17556430

申请日：2021-12-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang DAI ,  Hongliang WANG ,  Shuru CHEN ,  Mei CAI

IPC: G01B11/06

CPC classification number: G01B11/0641 ,  H01M2004/027

Abstract: A system for measuring a thickness of a coating arranged on an anode substrate includes an optical measurement system configured to transmit a light signal having a known first polarization toward the anode substrate through the coating such that the light signal is reflected from the surface of the anode substrate, a detection module positioned to receive the reflected light signal and configured to determine a second polarization of the reflected light signal that is different from the first polarization and measure a polarization difference between the first polarization and the second polarization, and a measurement module configured to receive the measured polarization difference, calculate the thickness of the coating based on the measured polarization difference, and generate an output based on the calculated thickness.

公开(公告)号：US20230187607A1

公开(公告)日：2023-06-15

申请号：US17548499

申请日：2021-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Biqiong WANG ,  Fang DAI ,  Shuru CHEN ,  Mei CAI

IPC: H01M4/1395 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M10/0565

CPC classification number: H01M4/1395 ,  H01M4/134 ,  H01M4/382 ,  H01M10/052 ,  H01M10/0565 ,  H01M2300/0085

Abstract: A method of preparing a lithium metal electrode for an electrochemical cell, such as a lithium metal battery, includes introducing a treatment gas into a chamber including an electrode precursor. The treatment gas may include a reactant gas and/or a plasma. The electrode precursor includes lithium metal and a passivation layer. The method further includes forming the lithium metal electrode by contacting the treatment gas with the passivation layer to remove at least a portion of the passivation layer. The present disclosure also provides pretreated electrodes and electrode assemblies.

公开(公告)号：US20210218015A1

公开(公告)日：2021-07-15

申请号：US16743650

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shuru CHEN ,  Fang DAI ,  Mei CAI

IPC: H01M4/139 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/38 ,  H01M4/62

Abstract: The present disclosure relates to sulfur-containing electrodes and methods for forming the same. For example, the method may include disposing an electroactive material on or near a current collector to form an electroactive material layer having a first porosity and applying pressure and heat to the electroactive material layer so that the electroactive material layer has a second porosity. The first porosity is greater than the second porosity. The electroactive material may include a plurality of electroactive material particles and one or more salt additives. The method may further include contacting the electroactive material layer and an electrolyte such that the electrolyte dissolves the plurality of one or more salt particles so that the electroactive material layer has a third porosity. The third porosity may be greater than the second porosity and less than the first porosity.

公开(公告)号：US20230287153A1

公开(公告)日：2023-09-14

申请号：US17690831

申请日：2022-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Robert D. SCHMIDT ,  Shuru CHEN ,  Fang DAI ,  Mei CAI

IPC: C08F8/36 ,  C08F120/44

CPC classification number: C08F8/36 ,  C08F120/44 ,  H01M10/0565

Abstract: Methods for forming sulfur polyacrylonitrile are provide. In certain variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, sealing a container holding the admixture, heating the admixture to a first temperature venting the container holding the admixture to release gases generated during the heating of the admixture to the first temperature, re-sealing the container holding the admixture, and heating the admixture to a second temperature. In other variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, heating the admixture to a first temperature, sealing a container holding the admixture, and heating the admixture to a second temperature. The second temperature is greater than the first temperature.

公开(公告)号：US20230246295A1

公开(公告)日：2023-08-03

申请号：US17588707

申请日：2022-01-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Yifan ZHAO ,  Biqiong WANG ,  Shuru CHEN ,  Mei CAI

IPC: H01M50/434 ,  H01M50/449

CPC classification number: H01M50/434 ,  H01M50/449

Abstract: The present disclosure provides a coated separator including a porous separator and a ceramic coating disposed on one or more surfaces thereof. The ceramic coating includes a ceramic material and an additive selected from the group consisting of: lithium nitrate (LiNO3), lithium phosphate (LiPO3), lithium orthophosphate (Li3PO4), lithium difluoro (oxalate) borate (LiDBoB), cyclic sulfone, polysulfide, lithium halide salts, and combinations thereof. In certain variations, the coated separator is prepared by contacting the porous separator with a slurry including the ceramic material and the additive. In other variations, the coated separator is prepared by forming a ceramic coating on one or more surfaces of a porous separator and contacting the porous separator with the additive, for example by immersing, or alternatively, a spraying process.

公开(公告)号：US20210218048A1

公开(公告)日：2021-07-15

申请号：US16743699

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang DAI ,  Hongliang WANG ,  Mahmoud ABD ELHAMID ,  Shuru CHEN ,  Mei CAI

IPC: H01M10/04 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/131 ,  H01M4/136 ,  H01M4/133

Abstract: A battery that cycles lithium ions includes at least one first monopolar electrode having a first polarity and having a first tab and at least one second monopolar electrode having a second polarity opposite to the first polarity and a second tab. The first tab and the second tab are in direct electrical communication with an external circuit. At least one bipolar electrode is disposed between and electrically insulated from the first monopolar electrode and the second monopolar electrode, wherein a first side of the bipolar electrode has the first polarity and a second side of the bipolar electrode has the second polarity. The battery thus comprises at least one first unit cell connected in parallel and at least one second unit cell connected in series.

公开(公告)号：US20210184199A1

公开(公告)日：2021-06-17

申请号：US16711195

申请日：2019-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meinan HE ,  Shuru CHEN ,  Biqiong WANG ,  Mei CAI

IPC: H01M4/04 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/0525

Abstract: A method for preparing an electrochemical cell that cycles lithium ions is provided. The method includes lithiating an electroactive material using a first electrolyte and contacting the lithiated electroactive material and a second electrolyte to form the electrochemical cell. Lithiating the electroactive material includes contacting the electroactive material and a first electrolyte to form a pretreated electroactive material; contacting a lithium source and the pretreated electroactive material; and applying a pressure to the lithium source and the pretreated electroactive material so as to form a lithiated electroactive material. The first electrolyte includes greater than or equal to about 10 wt. % to less than or equal to about 50 wt. % of one or more solvents selected, including for example, fluoroethylene carbonate (FEC). The second electrolyte includes less than or equal to about 5 wt. % of cyclic carbonates and, in certain aspects, one or more electrolyte additives.