Gm Global Technolgoy Operations, Inc.

Gayatri Vyas Dadheech

Mahmoud H Abd Elhamid

Youssef Morcos Mikhail

Thomas A Seder

James A Carpenter

Mei Cai

Thomas A Trabold

Brian James Koch

Jing Gao

Xingcheng Xiao

Mark William Verbrugge

Li Yang

Alfred Zhang

Gerald W Fly

Taeyoung Han

Bahram Khalighi

Alok Warey

Michael J Lukitsch

Reena L Datta

Curtis A Wong

Jeffrey Allan Rock

Zhe Li

Alireza Fatemi

Gongshin Qi

Michael P Balogh

Anthony M Coppola

Richard H Blunk

Steven J Spencer

Robert D Schmidt

Keith E Newman

Paul Edward Krajewski

Xiaosong Huang

Kai-Han Chang

Fang Dai

Steven R Falta

James R Salvador

Jon P Owejan

Frederick E Pinkerton

Arianna T Morales

Hongliang Wang

Daniel John Lisi

Pinkhas A Rapaport

Robert S Conell

Yan Zhang

Daniel P Miller

Sherman H Zeng

Kestutis A Sonta

James A Leistra

Feng Zhong

Yew Sum Leong

Biqiong Wang

Margarita P Thompson

Jeffrey M Guzda

Nicholas P Irish

Prasad N Gadgil

Sumeet Bhargava

Vijay P Saharan

Misle M Tessema

Xiaoqing Zeng

Gerhard Winter

Maria C Militello

Gregory K Maclean

A system for detecting a lithium dendrite in a battery cell is provided. The system includes the battery cell including an anode and a cathode. The battery cell further includes a conductive prewarning layer disposed between the anode and the cathode and constructed with a porous material. The battery cell further includes a separator layer disposed between the conductive prewarning layer and the cathode, wherein the separator layer is configured for allowing ions to pass through the separator layer. The system further includes a sensor electrically connected to the anode and the conductive prewarning layer and monitoring data related to a voltage potential between the anode and the conductive prewarning layer. The data is useful to identify a decrease in the voltage potential between the anode and the conductive prewarning layer and diagnose existence of the lithium dendrite.

System and method for detecting a lithium dendrite in a battery cell

A monitoring assembly for an electrochemical cell of a secondary lithium battery includes a porous sensory structure and a transducer. The porous sensory structure includes a sensory layer disposed on a major surface of a porous separator and a buffer layer disposed between the sensory layer and a facing surface of a negative electrode layer. The buffer layer electrically isolates the sensory layer from the facing surface of the negative electrode layer. The sensory layer includes an electrically conductive material and is configured to produce a response to an input signal or to a physical stimulus received within the electrochemical cell. The transducer is configured to process the response produced by the sensory layer to generate an output signal indicative of a diagnostic condition within the electrochemical cell.

Electrochemical cell monitoring assembly

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.

Thin-film reference electrodes, electrochemical devices including thin-film reference electrodes, and methods of making thin-film reference electrodes

An electrode for an electrochemical cell is provided. The electrode includes a carbon membrane having a first face and an opposing second face, wherein at least a portion of the carbon membrane is modified to include an elevated number of nucleation sites for lithium relative to the carbon membrane when unmodified.

Electrode architecture for fast charging

A reference electrode assembly for an electrochemical cell of a secondary lithium ion battery and methods of manufacturing the same. The reference electrode assembly includes a porous membrane having a major surface and a porous reference structure deposited on the major surface of the porous membrane. The porous reference structure includes a porous carbon layer and a porous reference electrode layer that at least partially overlaps the porous carbon layer on the major surface of the porous membrane.

Reference electrode assembly and method of manufacturing the same

A multifunctional self-cleaning surface layer and methods of preparing the multifunctional self-cleaning surface layer are provided. The multifunctional self-cleaning surface layer includes an inorganic matrix including silicon and oxygen; a plurality of photocatalytic active particles distributed within and bonded to the inorganic matrix; and a plurality of nanopores defined within the inorganic matrix in regions corresponding to bonds between the plurality of photocatalytic active particles and the inorganic matrix. Water molecules may be disposed within at least a portion of the plurality of nanopores. In the presence of water and electromagnetic radiation, the plurality of photocatalytic active particles may facilitate a decomposition reaction of any oil or organic residue on the multifunctional self-cleaning surface layer.

Multifunctional self-cleaning surface layer and methods of forming the same

The present disclosure provides an electrochemical cell that includes an electrically conductive material layer, a precursor material disposed on or adjacent to a first surface of the electrically conductive material layer, and an electroactive material layer disposed on or adjacent to the precursor material. In certain variations, the precursor material forms a continuous layer and a solid-electrolyte interface layer is disposed on or adjacent to an exposed surface of the electroactive material layer. In other variations, the precursor material forms a plurality of distinct precursor structures disposed on the first surface of the electrically conductive material layer in a predetermined pattern, such that at least a portion of each distinct precursor structure is unobstructed by the electroactive material layer. The distinct precursor structures are configured to form surface structures that chemically attach the solid-electrolyte interface layer and the electrically conductive material layer.

Current collectors having surface structures for controlling formation of solid-electrolyte interface layers

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.

Rotary electric machine with adhesive-reinforced rotor

A system includes a display. The display includes an array of LEDs covered by a transparent material. The array of LEDs includes a plurality of first, second, third, and fourth LEDs respectively configured to emit red, green, blue, and violet light. The red, green, and blue light from the first, second, and third LEDs is visible to human eye. Violet light from the fourth LEDs is invisible to human eye. The system includes a photocatalytic coating disposed on the transparent material. The photocatalytic coating includes a photo-catalyst responsive to ultraviolet radiation present in sunlight and to the violet light emitted by the fourth LEDs in the array of LEDs. The system includes a controller configured to selectively turn on the fourth LEDs to activate the photo-catalyst in the photocatalytic coating disposed on the transparent material.

Self-cleaning system for displays using light emitting diodes emitting invisible violet light

A temperature sensor for a battery cell of a rechargeable battery is described, and includes a resistive sensing element, a first electrode, and a second electrode. The resistive sensing element, the first electrode, and the second electrode are affixed to a porous separator. The porous separator is interposed between an anode and a cathode of the battery cell. The resistive sensing element is electrically connected in series between the first electrode and the second electrode, and the resistive sensing element, the first electrode and the second electrode are affixed onto the separator as film layers, and are porous.

Temperature sensor

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 may include 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.

Light-enhanced self-cleaning film system and method of forming same

A lithium ion battery is provided that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. One or more of the separator, positive electrode, and negative electrode includes a transition metal compound capable of catalyzing any gaseous reactants formed in the lithium ion battery to form a liquid. The transition metal compound may include ruthenium (Ru). In certain variations, the lithium ion battery includes an electrolyte that is a conductive medium for lithium ions to move between the positive electrode and the negative electrode. The electrolyte comprises a transition metal compound capable of catalyzing a reaction of any gaseous reactants to form a liquid.

Elimination of gaseous reactants in lithium ion batteries

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.

Reference electrode assemblies including thin, porous current collectors and methods of manufacturing thin, porous current collectors

Growing community of inventors

Bloomfield Hills, MI, United States of America

Gayatri Vyas Dadheech