公开(公告)号：US20190058210A1

公开(公告)日：2019-02-21

申请号：US15677760

申请日：2017-08-15

Applicant: GM Global Technology Operations LLC

Inventor： Fang Dai ,  Li Yang ,  Thomas A. Yersak ,  James R. Salvador ,  Mei Cai

IPC: H01M10/056 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/38

Abstract: An electrochemical cell includes a negative electrode that contains lithium and an electrolyte system. In one variation, the electrolyte system includes a first liquid electrolyte, a solid-dendrite-blocking layer, and an interface layer. The solid dendrite-blocking layer is ionically conducting and electrically insulating. The dendrite-blocking layer includes a first component and a distinct second component. The dendrite-blocking layer has a shear modulus of greater than or equal to about 7.5 GPa at 23° C. The interface layer is configured to interface with a negative electrode including lithium metal on a first side and the dendrite blocking layer on a second opposite side. The interface layer includes a second liquid electrolyte, a gel polymer electrolyte, or a solid-state electrolyte. The dendrite-blocking layer is disposed between the first liquid electrolyte and the interface layer.

公开(公告)号：US20180237656A1

公开(公告)日：2018-08-23

申请号：US15435820

申请日：2017-02-17

Applicant: GM Global Technology Operations LLC

Inventor： Fang Dai ,  Mei Cai ,  Tao Wang ,  Mohammed Bahauddin ,  Sherman Zeng

IPC: C09D171/00 ,  H01M2/10 ,  H01M10/0525

CPC classification number: C09D171/00 ,  F28D1/03 ,  H01M2/1077 ,  H01M2/1094 ,  H01M10/0525 ,  H01M10/625 ,  H01M10/6567 ,  H01M2220/20 ,  Y02E60/122

Abstract: The present disclosure provides a battery pack component including a self-healing coating. The self-healing coating is disposed on at least a portion of a surface of the battery pack component. The self-healing coating includes a first precursor including a cyclic ether capable of reacting in a self-healing cationic ring-opening polymerization reaction. The self-healing coating further includes an initiator including an alkali metal salt. The self-healing cationic ring-opening polymerization reaction occurs when a defect is present in the self-healing coating. In certain aspects, the cyclic ether may include 1,3-dioxolane (C3H6O2) and the initiator may include lithium bis(fluorosulfonyl)imide (F2NaNO4S2). In other aspects, the self-healing coating may include a second precursor that is capable of copolymerizing with the first precursor. In still other aspects, the present disclosure provides a method of making a self-healing coating for a battery pack component.

公开(公告)号：US20250096248A1

公开(公告)日：2025-03-20

申请号：US18469744

申请日：2023-09-19

Applicant: GM Global Technology Operations LLC

Inventor： Insun Yoon ,  Kyungjae Lee ,  Yifan Zhao ,  Manuela Ferreira Borras ,  Meinan He ,  Fang Dai

IPC: H01M4/40 ,  H01M4/02 ,  H01M4/04 ,  H01M4/66

Abstract: A battery cell, including an anode, a cathode, and a reference electrode, wherein the reference electrode is interposed between the anode and the cathode; wherein the reference electrode includes an active material layer disposed on a current collector; and wherein the active material layer includes lithium, a lithium aluminum alloy, sodium, a sodium potassium alloy, a sodium calcium alloy, a sodium-lithium-magnesium alloy, a sodium-lithium-aluminum alloy, a sodium lead alloy, a sodium silicon alloy, a sodium antimony alloy, or a sodium zinc alloy.

公开(公告)号：US11735776B2

公开(公告)日：2023-08-22

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: H01M4/00 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/38

CPC classification number: H01M10/0569 ,  H01M4/382 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5815 ,  H01M2300/0034 ,  H01M2300/0037

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：US11502287B2

公开(公告)日：2022-11-15

申请号：US16131884

申请日：2018-09-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M4/14 ,  H01M4/66 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/58 ,  H01M4/04 ,  H01M10/0585 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/74 ,  H01M10/052 ,  H01M4/80

Abstract: In a method of manufacturing an electrochemical cell, a porous or non-porous metal substrate may be provided. A precursor solution may be applied to a surface of the metal substrate. The precursor solution may comprise a chalcogen donor compound dissolved in a solvent. The precursor solution may be applied to the surface of the metal substrate such that the chalcogen donor compound reacts with the metal substrate and forms a conformal metal chalcogenide layer on the surface of the metal substrate. A conformal lithium metal layer may be formed on the surface of the metal substrate over the metal chalcogenide layer.

公开(公告)号：US11451071B2

公开(公告)日：2022-09-20

申请号：US16890344

申请日：2020-06-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Shifang Li ,  Jinming Liu ,  Yue Fan ,  Mei Cai

IPC: H02J7/00 ,  B60L58/19

Abstract: A battery electric vehicle includes a high voltage rechargeable energy storage system (RESS). The RESS includes several battery modules reconfigurable among parallel and series arrangements. During reconfiguration transitions, a low voltage battery services low voltage loads of the battery electric vehicle. The low voltage battery is preconditioned in advance of reconfigurations.

公开(公告)号：US11309539B2

公开(公告)日：2022-04-19

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 ,  H01M10/05 ,  H01M4/48 ,  H01M4/58 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/054 ,  H01M4/134 ,  H01M4/66 ,  H01M4/74 ,  H01M10/052 ,  H01M4/80

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.

公开(公告)号：US20210218057A1

公开(公告)日：2021-07-15

申请号：US16742399

申请日：2020-01-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M10/0565 ,  H01M4/134 ,  H01M4/505 ,  H01M4/136 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/58 ,  H01M10/0569 ,  H01M4/38 ,  H01M4/131 ,  H01M4/02

Abstract: In an embodiment, a metal-organic framework electrolyte layer, can comprise a plurality of metal-organic frameworks having a porous structure and comprising a solvated salt absorbed in the porous structure; and a polymer. The MOF electrolyte layer can have at least one of a density of less than or equal to 0.3 g/cm3 or a Brunauer-Emmett-Teller surface area of 500 to 4,000 m2/g. A lithium metal battery can comprise the metal-organic framework electrolyte layer.

公开(公告)号：US10944096B2

公开(公告)日：2021-03-09

申请号：US15949609

申请日：2018-04-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Hongliang Wang ,  Wayne Cai ,  Mei Cai ,  Michael P. Balogh

IPC: H01M4/62 ,  H01M4/72 ,  H01M4/74 ,  H01M4/82 ,  H01M6/00 ,  H01M4/04 ,  H01M4/66 ,  H01M4/38 ,  H01M4/134 ,  H01M10/052 ,  B23K26/22 ,  B23K26/354 ,  H01M4/1395 ,  H01M4/02 ,  B23K101/36

Abstract: A negative electrode for an electrochemical cell of a lithium metal battery may be manufactured by welding together a lithium metal layer and a metallic current collector layer. The lithium metal layer and the current collector layer may be arranged adjacent one another and in an at least partially lapped configuration such that faying surfaces of the layers confront one another and establish a faying interface therebetween at a weld site. A laser beam may be directed at an outer surface of the current collector layer at the weld site to melt a portion of the lithium metal layer adjacent the faying surface of the current collector layer and produce a lithium metal molten weld pool. The laser beam may be terminated to solidify the molten weld pool into a solid weld joint that physically bonds the lithium metal layer and the current collector layer together at the weld site.

公开(公告)号：US10727535B2

公开(公告)日：2020-07-28

申请号：US15491089

申请日：2017-04-19

Applicant: GM Global Technology Operations LLC

Inventor： Li Yang ,  Mei Cai ,  Peng Lu ,  Fang Dai

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/131 ,  H01M4/48 ,  H01M4/38

Abstract: Electrochemical cells that cycle lithium ions are provided. The electrochemical cells have an electrode that includes a silicon-containing electroactive material that undergoes volumetric expansion and contraction during the cycling of the electrochemical cell; and an electrolyte system that promotes passive formation of a flexible protective layer comprising a lithium fluoride-polymer composite on one or more exposed surface regions of the silicon-containing electroactive material. The electrolyte system includes a lithium salt, at least one cyclic carbonate, and two or more linear carbonates. At least one of the two or more linear carbonate-containing co-solvents is a fluorinated carbonate-containing co-solvent. The electrolyte system accommodates the volumetric expansion and contraction of the silicon-containing electroactive material to promote long term cycling stability.