公开(公告)号：US20190342985A1

公开(公告)日：2019-11-07

申请号：US15970221

申请日：2018-05-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Bahram Khalighi ,  Taeyoung Han

IPC: H05H1/24 ,  B62D35/02

Abstract: Systems and apparatuses for applying a plasma actuator system for reducing aerodynamic drag of a vehicle by discharging plasma is provided. The system includes: at least one pair of thin films configured to integrate into a pair of electrodes wherein each of the thin films of the pair of thin films is composed of a thin film piezo-electric material; a dielectric configured as an insulator region to separate each electrode integrated with the thin film piezo-electric material; and a power supply to deliver alternating current to each electrode to provide a high voltage output obtained by the thin film piezo-electric material integrated with the pair of electrodes wherein the high voltage output is about 10 kV.

公开(公告)号：US10429641B2

公开(公告)日：2019-10-01

申请号：US15609588

申请日：2017-05-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James A. Carpenter ,  Thomas A. Seder ,  Gayatri V. Dadheech

IPC: G02B1/18 ,  G02B27/00 ,  A61L2/232 ,  B08B7/00 ,  B08B17/02 ,  F21V8/00

Abstract: A self-cleaning film system includes a substrate and a film. The film includes a monolayer formed from a fluorinated material, and a first plurality of regions disposed within the monolayer and spaced apart from one another such that each of the regions abuts, is surrounded by, and is not covered by the fluorinated material. Each of the regions includes a photocatalytic material. The system also includes a wave guide disposed adjacent the substrate. The wave guide includes a first light source configured for emitting a first portion of electromagnetic radiation towards the film having an ultraviolet wavelength of from 10 nm to 400 nm, and a second light source configured for emitting a second portion of electromagnetic radiation towards the film having an infrared wavelength of from 700 nm to 1 mm. A method of forming a self-cleaning film system configured for reducing a visibility of a contaminant is disclosed.

公开(公告)号：US20180333709A1

公开(公告)日：2018-11-22

申请号：US15598829

申请日：2017-05-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas A. Seder ,  James A. Carpenter ,  Gayatri V. Dadheech

IPC: B01J35/00 ,  B01J21/06 ,  B08B17/02 ,  B08B7/00

Abstract: A self-cleaning film system configured for reducing a visibility of a contaminant includes a substrate and a film. The film includes a monolayer defining a plurality of cavities and formed from a first material having a first surface energy, and a plurality of patches disposed within the plurality of cavities. Each of the patches is formed from a photocatalytic material having a second surface energy that is higher than the first. The film has a touchpoint area having a first use frequency, and a second area having a second use frequency that is less than the first. The patches are present in the touchpoint area in a first concentration and are configured to direct the contaminant towards the second area. The patches are present in the second area in a second concentration that is higher than the first and are configured to reduce the visibility of the contaminant.

公开(公告)号：US09905847B2

公开(公告)日：2018-02-27

申请号：US14945166

申请日：2015-11-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Xingcheng Xiao ,  Mei Cai

IPC: H01M4/04 ,  H01M4/36 ,  H01M4/48 ,  H01M4/38 ,  H01M4/62 ,  C23C14/00 ,  C23C14/06 ,  H01M4/02

CPC classification number: H01M4/366 ,  C23C14/0005 ,  C23C14/0042 ,  C23C14/0605 ,  C23C14/223 ,  C23C14/225 ,  H01M4/0426 ,  H01M4/38 ,  H01M4/386 ,  H01M4/483 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/021

Abstract: In an example of a method for making an electrode active material, a sacrificial layer is formed on a nanomaterial. Carbon is coated on the sacrificial layer to form a carbon layer. Titanium dioxide is coated on the carbon layer to form a titanium dioxide layer. The sacrificial layer is removed to form a void between the nanomaterial and the carbon layer.

公开(公告)号：US20170327948A1

公开(公告)日：2017-11-16

申请号：US15154358

申请日：2016-05-13

Applicant: GM Global Technology Operations LLC

Inventor： Gayatri V. Dadheech ,  Mei Cai ,  Prasad Gadgil

IPC: C23C16/455 ,  C23C16/44

CPC classification number: C23C16/45544 ,  B82Y40/00 ,  C23C16/40 ,  C23C16/4417 ,  C23C16/45531 ,  C23C16/45555

Abstract: A powder coating apparatus reactor includes a loading port for a powder material, an inlet for one or more coating precursors, and a reaction chamber having an inner surface and a plurality of axial baffles. Each axial baffle extends inwardly from the inner surface of the reaction chamber of the rotary vessel. The plurality of axial baffles is configured to keep the powder material flowing within the reaction chamber during rotation of the rotary vessel to facilitate contact between the powder material and the one or more coating precursors. The powder coating apparatus further includes a rotary vacuum seal located at the loading port. The powder coating apparatus also includes a motor capable of actuating the rotary vessel about a center axis for rotation during reaction of the powder material with the coating precursors in the reaction chamber. Methods for coating powder materials with such a reactor are also provided.

公开(公告)号：US12113184B2

公开(公告)日：2024-10-08

申请号：US17752185

申请日：2022-05-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jing Gao ,  Brian J. Koch ,  Zhe Li ,  Alfred Zhang ,  Gayatri V. Dadheech

IPC: H01M10/04 ,  B05D1/00 ,  H01M10/48

CPC classification number: H01M10/48 ,  B05D1/005

Abstract: A method of making a reference electrode assembly for an electrochemical cell according to various aspects of the present disclosure includes providing a subassembly including a separator layer and a current collector layer coupled to the separator layer. The method further includes providing an electrode ink including an electroactive material, a binder, and a solvent. The method further includes creating a reference electrode precursor by applying an electroactive precursor layer to the current collector layer. The electroactive precursor layer covers greater than or equal to about 90% of a superficial surface area of a surface of the current collector layer. The electroactive precursor layer includes the electrode ink. The method further includes creating the reference electrode assembly by drying the electroactive precursor layer to remove at least a portion of the solvent, thereby forming an electroactive layer. The electroactive layer is solid and porous.

公开(公告)号：US20240072259A1

公开(公告)日：2024-02-29

申请号：US17894687

申请日：2022-08-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael A. Lelli ,  Seung-Woo Chu ,  Gayatri V. Dadheech

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

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/027

Abstract: A system including a lithium-ion battery cell is disclosed. The lithium-ion battery cell includes a first electrode. The first electrode includes a current collector including a surface and an electrode coating formed from an electrode coating slurry and disposed on the current collector. The electrode coating slurry includes a plurality of flakes of flake graphite. Each of the plurality of flakes includes two parallel planar surfaces and an edge plane defined by the two parallel planar surfaces. The edge planes of the plurality of flakes are statistically facing toward the surface of the current collector. The first electrode further includes a conductive material including a high aspect ratio nano-sized carbon material. The carbon material is configured for providing attractive forces between components of the electrode coating. The lithium-ion battery cell further includes a second electrode, a separator disposed between the first electrode and the second electrode, and an electrolyte.

公开(公告)号：US20230282805A1

公开(公告)日：2023-09-07

申请号：US17685700

申请日：2022-03-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Mark W. Verbrugge ,  Brian J. Koch ,  Jing Gao ,  Alok Warey

IPC: H01M4/134 ,  H01M10/48 ,  G01R31/382 ,  H01M10/0525 ,  C23C18/54 ,  H01M4/04

CPC classification number: H01M4/134 ,  C23C18/54 ,  G01R31/382 ,  H01M4/0438 ,  H01M10/0525 ,  H01M10/48

Abstract: A reference electrode assembly for an electrochemical cell includes a separator constructed from an electrically-insulating porous material. The reference electrode assembly also includes a current collector having a sputtered electrically-conducting porous layer arranged directly on the separator and a sputtered lithium iron phosphate (LFP) layer arranged directly on the electrically-conducting porous layer. The reference electrode assembly additionally includes an electrical contact connected to the current collector. A method using successive vacuum deposition of individual layers onto the separator is employed in fabricating the reference electrode assembly.

公开(公告)号：US20220140680A1

公开(公告)日：2022-05-05

申请号：US17084181

申请日：2020-10-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anthony M. Coppola ,  Kestutis A. Sonta ,  Alireza Fatemi ,  Gayatri V. Dadheech ,  Yew Sum Leong ,  Xiaosong Huang

IPC: H02K1/28 ,  H02K1/27 ,  H02K1/32 ,  H02K15/03 ,  H02K21/14 ,  B60K1/00

Abstract: An adhesive-reinforced rotor for a rotary electric machine includes rotor lamination layers (“rotor lams”) having axial inner surfaces collectively defining rotor openings through the rotor lams. The rotor also includes reinforcement blocks disposed within a respective one of the rotor openings. A polymer primer/adhesive layer of the rotor having a bond line thickness of less than 1 mm is disposed between the one or more reinforcement blocks and the axial inner surfaces of the rotor lams. The reinforcement blocks and the primer/adhesive layer each have a tensile strength of at least 50 MPa. A modulus of elasticity of the reinforcement blocks is at least three times greater than that of the materials of the polymer primer/adhesive layer. A method of constructing an adhesive-reinforced rotor is also described herein.

公开(公告)号：US11245105B2

公开(公告)日：2022-02-08

申请号：US16577921

申请日：2019-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. Dadheech ,  Brian J. Koch ,  Alfred Zhang ,  Robert S. Conell ,  Jing Gao

IPC: H01M50/403 ,  H01M10/48 ,  C23C14/35 ,  C23C14/34 ,  C23C14/20 ,  C23C14/14 ,  G01R19/00 ,  G01R31/364 ,  H01M4/04 ,  H01M4/52 ,  H01M10/0525 ,  H01M4/66 ,  C23C14/00 ,  H01M4/134 ,  H01J37/34

Abstract: A method of manufacturing a component for a reference electrode assembly according to various aspects of the present disclosure includes providing a separator having first and second opposing surfaces. The method further includes sputtering a first current collector layer to the first surface via magnetron or ion beam sputtering deposition. A porosity of the separator is substantially unchanged by the sputtering. In one aspect, the method further includes sputtering a second current collector layer to the second surface via magnetron or ion beam sputtering deposition. In one aspect, the first current collector layer includes nickel and defines a first thickness of greater than or equal to about 200 nm to less than or equal to about 300 nm and the second current collector layer includes gold and defines a second thickness of greater than or equal to about 25 nm to less than or equal to about 100 nm.