Abstract: Provided are methods of preparing 3-R-1,4,2-dioxazol-5-one compounds using convenient and efficient methods. Also provided are 3-R-1,4,2-dioxazol-5-one compounds produced using the methods described.
Type:
Application
Filed:
June 13, 2019
Publication date:
December 17, 2020
Applicant:
Tesla Motors Canada ULC
Inventors:
David S. Hall, Jeffery Raymond Dahn, Toren Hynes
Abstract: A computer-implemented method for determining a concentration of a component of an electrolyte in a lithium-ion or for a lithium-ion cell is provided. The method includes providing, to a spectrometer, instructions to capture a spectrum of a sample solution of the electrolyte and generate a signal. The method includes analyzing the signal to determine one or more spectral features of the spectrum. The method includes preparing a database of spectra corresponding to solutions having predetermined concentrations of the component of the electrolyte wherein the database includes a plurality for spectral features for each solution. The method further includes determining a machine learning (ML) model using the database of spectra. The method includes determining the concentration of the component of the electrolyte in the sample solution using the machine learning model.
Type:
Grant
Filed:
December 6, 2017
Date of Patent:
October 13, 2020
Assignee:
Tesla Motors Canada ULC
Inventors:
Leah Devorah Ellis, Samuel Buteau, Samuel Gerard Carson Hames, Jeffery R. Dahn, David Scott Hall
Abstract: Provided are electrolyte solutions including both lithium difluoro(oxalato)borate and lithium tetrafluoroborate and a solvent component for use in lithium metal or anode-free rechargeable battery cell and methods of using the electrolyte solutions to improve capacity retention of the battery cells. Also provided are rechargeable battery systems including a lithium metal or anode-free battery cell and electrolyte solutions including both lithium difluoro(oxalato)borate and lithium tetrafluoroborate and a solvent component. The systems described herein exhibit improved capacity retention.
Type:
Application
Filed:
January 8, 2019
Publication date:
July 9, 2020
Applicant:
Tesla Motors Canada ULC
Inventors:
Cameron Martin, Sam Hames, Matthew Genovese, Alexander J. Louli, Rochelle Weber, Jeffrey Dahn
Abstract: Methods of preparing electrodes for use in rechargeable battery using two lithiation steps wherein, including a first lithiation step conducted at higher temperatures than the second lithiation step.
Type:
Application
Filed:
February 1, 2019
Publication date:
April 23, 2020
Applicant:
Tesla Motors Canada ULC
Inventors:
Hongyang Li, Jing Li, Jeffery Raymond Dahn
Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved systems include a nonaqueous electrolyte including one or more lithium salts, one or more nonaqueous solvents, and an additive or additive mixture comprising one or more operative additives selected from a group of disclosed compounds, including 3-aryl substituted 1,4,2-dioxazol-5-ones and 3-phenyl-1,3,2,4-dioxathiazole 2-oxide.
Type:
Application
Filed:
July 25, 2018
Publication date:
December 26, 2019
Applicant:
Tesla Motors Canada ULC
Inventors:
Jeffery Raymond Dahn, Toren Hynes, David Scott Hall
Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved battery systems consist of two-additive mixtures in an electrolyte solvent. Such battery systems are prepared by assembling a positive electrode and a negative electrode in the sealed cell, removing residual water from the sealed cell, filling the sealed cell with a nonaqueous electrolyte under an inert atmosphere, vacuum-sealing the sealed cell, carrying out a formation process comprising charging and discharging the sealed cell until the sealed cell achieves an initial capacity. The nonaqueous electrolyte includes lithium ions, a first nonaqueous solvent comprising a carbonate solvent, a second nonaquaeous solvent comprising methyl acetate, and an additive mixture of a first operative additive of either vinylene carbonate or fluoroethylene carbonate and a second operative additive of 2-furanone. Gas formation is suppressed in the battery system during the formation process.
Abstract: Improved battery systems with two-additive mixtures including in an electrolyte solvent that is a carbonate solvent, an organic solvent, a non-aqueous solvent, methyl acetate, or a combination of them. The positive electrode of the improved battery systems may be formed from lithium nickel manganese cobalt compounds, and the negative electrode of the improved battery system may be formed from natural or artificial graphite.
Type:
Application
Filed:
August 7, 2018
Publication date:
September 12, 2019
Applicant:
Tesla Motors Canada ULC
Inventors:
Jeffery Raymond Dahn, Xiaowei Ma, Stephen Laurence Glazier, Robert Scott Young
Abstract: A computer-implemented method for determining a concentration of a component of an electrolyte in a lithium-ion or for a lithium-ion cell is provided. The method includes providing, to a spectrometer, instructions to capture a spectrum of a sample solution of the electrolyte and generate a signal. The method includes analyzing the signal to determine one or more spectral features of the spectrum. The method includes preparing a database of spectra corresponding to solutions having predetermined concentrations of the component of the electrolyte wherein the database includes a plurality for spectral features for each solution. The method further includes determining a machine learning (ML) model using the database of spectra. The method includes determining the concentration of the component of the electrolyte in the sample solution using the machine learning model.
Type:
Application
Filed:
December 6, 2017
Publication date:
June 6, 2019
Applicant:
Tesla Motors Canada ULC
Inventors:
Leah Devorah Ellis, Samuel Buteau, Samuel Gerard Carson Hames, Jeffery R. Dahn, David Scott Hall
Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved battery systems consist of two-additive mixtures in an electrolyte solvent that is a carbonate solvent, an organic solvent, a non-aqueous solvent, and/or methyl acetate. The positive electrode of the improved battery systems may be formed from lithium nickel manganese cobalt compounds, and the negative electrode of the improved battery system may be formed from natural or artificial graphite.
Type:
Application
Filed:
July 31, 2017
Publication date:
January 31, 2019
Applicant:
Tesla Motors Canada ULC
Inventors:
Jeffery R. Dahn, Jing Li, Stephen Laurence Glazier