公开(公告)号：US20230282808A1

公开(公告)日：2023-09-07

申请号：US17688163

申请日：2022-03-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sanaz KETABI ,  Shuru CHEN ,  Fang DAI ,  Mei CAI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/58 ,  H01M4/38

CPC classification number: H01M4/366 ,  H01M4/628 ,  H01M4/364 ,  H01M4/5825 ,  H01M4/382 ,  H01M4/5815 ,  H01M2004/021

Abstract: A method for forming a protective electrode coating on an electrode to be used in a lithium-sulfur battery is provided. The method includes contacting one or more surfaces of the electrode with a polymeric admixture, and polymerizing the polymeric admixture to form the protective electrode coating. The polymeric admixture includes a plurality of monomers, for example heterocyclic acetal monomers and/or cyclic ether monomers, and a lithium difluoro(oxalato)borate (LiDFOB) initiator. In certain instances, the polymeric admixture may also include a structural additive and/or a lithium salt. The contacting may include applying a thin film on the one or more surfaces of the electrode, and the polymerization may be heat activated.

公开(公告)号：US20210159502A1

公开(公告)日：2021-05-27

申请号：US16698303

申请日：2019-11-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/66

Abstract: An electrode component for an electrochemical cell is provided herein. The electrode component includes a current collector having a first surface, a metal oxide layer disposed on the first surface of the current collector, and a lithium-containing layer bonded to the first surface of the current collector. The metal oxide layer includes a plurality of features. A method for manufacturing such an electrode component is also provided herein. The method includes directing a laser beam toward the first surface of the current collector in the presence of oxygen to form the metal oxide layer on the first surface and applying the lithium-containing layer to the metal oxide layer thereby bonding the lithium-containing layer with the current collector.

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：US20240044838A1

公开(公告)日：2024-02-08

申请号：US17880518

申请日：2022-08-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Biqiong WANG ,  Insun YOON ,  Fang DAI ,  Mark W. Verbrugge

IPC: G01N27/48 ,  G01N27/333 ,  G01N27/30

CPC classification number: G01N27/48 ,  G01N27/333 ,  G01N27/301

Abstract: A system for assessing a characteristic of a reference electrode assembly for an electrochemical cell that cycle lithium ions includes a controller and a test cell assembly. The test cell assembly includes a metal case electrically coupled to the controller and a test cell disposed within the metal case. The test cell includes a lithium metal layer and a separator assembly. The separator assembly includes a separator layer, a current collector layer deposited on the separator layer, and optionally an electroactive layer deposited on the separator layer such that the electroactive layer at least partially overlaps the current collector layer. The current collector layer is in direct physical contact with an electroactive layer and is electrically isolated from the lithium metal layer by the separator layer.

公开(公告)号：US20200052338A1

公开(公告)日：2020-02-13

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 ,  H01M10/42 ,  H01M10/0568 ,  H01M10/0569

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：US20250149651A1

公开(公告)日：2025-05-08

申请号：US18641883

申请日：2024-04-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jeffrey David CAIN ,  Yifan ZHAO ,  Yun-Yu LAI ,  Thomas A. YERSAK ,  Zhe LI ,  Fang DAI

IPC: H01M10/42 ,  H01M4/38 ,  H01M4/58 ,  H01M10/052 ,  H01M10/0562 ,  H01M10/0568 ,  H01M10/058 ,  H01M50/383

Abstract: A battery cell includes an enclosure and a battery cell stack including C cathode electrodes each comprising a cathode active material layer arranged on a cathode current collector, S separators, and A anode electrodes each comprising an anode active material layer arranged on an anode current collector, wherein A, C, and S are integers greater than one. The anode active material layer includes an anode active material selected from a group consisting of silicon, silicon oxide, silicon alloy, and tin, a solid-state electrolyte comprising an oxysulfide, a conductive additive, and a binder. An electrolyte includes a solvate ionic liquid.

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：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.