Patents by Inventor Jeffery R. Dahn
Jeffery R. Dahn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230065400Abstract: The present disclosure relates to the synthesis and evaluation of difluorophosphate additives for use in energy storage devices. The difluorophosphate additive may be selected from the group consisting of lithium difluorophosphate (LFO), sodium difluorophosphate (NaFO), ammonium difluorophosphate (AFO), tetramethylammonium difluorophosphate (MAFO), potassium difluorophosphate (KFO), and combinations thereof. In some instances, the difluorophosphate additive is not lithium difluorophosphate (LFO).Type: ApplicationFiled: February 25, 2021Publication date: March 2, 2023Inventors: David S. Hall, Toren Hynes, Connor P. Aiken, Jeffery R. Dahn
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Publication number: 20210175547Abstract: 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: ApplicationFiled: October 16, 2020Publication date: June 10, 2021Inventors: Jeffery R. Dahn, Jing Li, Stephen Laurence Glazier
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Patent number: 10804562Abstract: 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: GrantFiled: December 6, 2017Date of Patent: October 13, 2020Assignee: Tesla Motors Canada ULCInventors: Leah Devorah Ellis, Samuel Buteau, Samuel Gerard Carson Hames, Jeffery R. Dahn, David Scott Hall
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Publication number: 20190173122Abstract: 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: ApplicationFiled: December 6, 2017Publication date: June 6, 2019Applicant: Tesla Motors Canada ULCInventors: Leah Devorah Ellis, Samuel Buteau, Samuel Gerard Carson Hames, Jeffery R. Dahn, David Scott Hall
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Publication number: 20190036171Abstract: 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: ApplicationFiled: July 31, 2017Publication date: January 31, 2019Applicant: Tesla Motors Canada ULCInventors: Jeffery R. Dahn, Jing Li, Stephen Laurence Glazier
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Publication number: 20100279210Abstract: Nanostructured thin film catalysts which may be useful as fuel cell catalysts are provided, the catalyst materials including intermixed inorganic materials. In some embodiments the nanostructured thin film catalysts may include catalyst materials according to the formula PtxM(1-x) where x is between 0.3 and 0.9 and M is Nb, Bi, Re, Hf, Cu or Zr. The nanostructured thin film catalysts may include catalyst materials according to the formula PtaCobMc where a+b+c=1, a is between 0.3 and 0.9, b is greater than 0.05, c is greater than 0.05, and M is Au, Zr, or Ir. The nanostructured thin film catalysts may include catalyst materials according to the formula PtaTibQc where a+b+c=1, a is between 0.3 and 0.9, b is greater than 0.05, c is greater than 0.05, and Q is C or B.Type: ApplicationFiled: April 23, 2010Publication date: November 4, 2010Inventors: Mark K. Debe, Radoslav Atanasoski, Susan M. Hendricks, Jeffery R. Dahn, David A. Stevens, Arnd Garsuch, Robert J. Sanderson
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Patent number: 6833707Abstract: Characterizing electrochemical cell components and a response of an electrochemical cell to a specified operating condition involves preparing a sample of an electrode material in contact with an electrolyte. Self-heating, power-temperature or power-time data is obtained for the sample using a calorimetry technique, such as by use of an accelerating rate calorimetry technique or a differential scanning calorimetry technique. A power function is developed for the sample using the self-heating, power-temperature or power-time data. The power function is representative of thermal power per unit mass of the sample as a function of temperature and amount of reactant remaining from a reaction of the sample electrode material and electrolyte.Type: GrantFiled: December 29, 1999Date of Patent: December 21, 2004Assignee: 3M Innovative Properties CompanyInventors: Jeffery R. Dahn, Dean D. MacNeil, Timothy D. Hatchard
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Patent number: 6436578Abstract: An electrode composition that includes (a) an electrochemically active metal element which, prior to cycling, is in the form of an intermetallic compound or an elemental metal and (b) a non-electrochemically active metal element. The electrode compositions have high initial capacities that are retained even after repeated cycling. The electrode compositions also exhibit high coulombic efficiencies.Type: GrantFiled: December 15, 2000Date of Patent: August 20, 2002Assignee: 3M Innovative Properties CompanyInventors: Robert L. Turner, Donald J. McClure, Larry J. Krause, Mary M. Buckett, Jeffery R. Dahn, Ou Mao
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Publication number: 20010008728Abstract: An electrode composition that includes (a) an electrochemically active metal element which, prior to cycling, is in the form of an intermetallic compound or an elemental metal and (b) a non-electrochemically active metal element. The electrode compositions have high initial capacities that are retained even after repeated cycling. The electrode compositions also exhibit high coulombic efficiencies.Type: ApplicationFiled: December 15, 2000Publication date: July 19, 2001Inventors: Robert L. Turner, Donald J. McClure, Larry J. Krause, Mary M. Buckett, Jeffery R. Dahn, Ou Mao
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Patent number: 6203944Abstract: An electrode for a lithium battery that includes (a) an electrochemically active metal element which, prior to cycling, is in the form of an intermetallic compound or an elemental metal and (b) a non-electrochemically active metal element. The electrode have high initial capacities that are retained even after repeated cycling. The electrode also exhibit high coulombic efficiencies.Type: GrantFiled: March 26, 1998Date of Patent: March 20, 2001Assignee: 3M Innovative Properties CompanyInventors: Robert L. Turner, Donald J. McClure, Larry J. Krause, Mary M. Buckett, Jeffery R. Dahn, Ou Mao
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Patent number: 6143268Abstract: A method for making a carbonaceous material suitable for use as an electrode composition that includes contacting pyrolyzed organic material with hydrocarbon gas for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when the carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material and an irreversible capacity no greater than about 140 mAH/g of carbonaceous material, the capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.Type: GrantFiled: October 14, 1997Date of Patent: November 7, 2000Assignee: 3M Innovative Properties CompanyInventors: Jeffery R. Dahn, Eddie R. P. Buiel
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Patent number: 5631106Abstract: A lithium ion battery electrode formed by the pyrolysis of a silazane polymer followed by introducing lithium ions. These electrodes can be used to form batteries with large capacities, low irreversible capacity, high density and good safety behavior.Type: GrantFiled: June 11, 1996Date of Patent: May 20, 1997Assignee: Dow Corning CorporationInventors: Jeffery R. Dahn, Alf M. Wilson, Weibing Xing, Gregg A. Zank
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Patent number: 5624606Abstract: Carbonaceous compounds and methods for preparation are described wherein the compounds comprise a pre-graphitic carbonaceous host having organized and disorganized regions and wherein atoms of other elements are incorporated in the host without changing the structure of the organized regions. A carbonaceous insertion compound with large reversible capacity for lithium can be prepared using elements capable of alloying with lithium, such as Si, as the incorporated atoms. These insertion compounds are suitable for use as high capacity anodes in lithium ion batteries.Type: GrantFiled: April 25, 1995Date of Patent: April 29, 1997Assignee: Moli Energy (1990) LimitedInventors: Alfred M. Wilson, Jeffery R. Dahn
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Patent number: 5587256Abstract: Carbonaceous insertion compounds and methods for preparation are described wherein the compounds comprise a pre-graphitic carbonaceous host and atoms of an element capable of alloying with alkali metal atoms, the alloying atoms being incorporated predominantly as monodispersed atoms in the host. A carbonaceous insertion compound with large reversible capacity for lithium can be prepared if the alloying atoms incorporated are Si. Such insertion compounds can be prepared by simple pyrolysis of suitable polymers containing silicon and carbon at an appropriate temperature. These insertion compounds may be suitable for use as high capacity anodes in lithium ion batteries.Type: GrantFiled: April 25, 1995Date of Patent: December 24, 1996Assignee: Moli Energy (1990) LimitedInventors: Alfred M. Wilson, Jeffery R. Dahn
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Patent number: 5264201Abstract: Lithiated nickel dioxide cathode-active materials for electrochemical cells aving the formula Li.sub.x Ni.sub.2-x-y M.sub.y O.sub.2, with x being between about 0.8 and about 1.0, M being one or more metals selected from cobalt, iron, chromium, titanium, manganese and vanadium, and y being less than about 0.2, with the proviso that y is less than about 0.5 for cobalt, which material is substantially free of lithium hydroxide and lithium carbonate. The materials are prepared by providing a substantially homogeneous dry intermediate mixture of a starting material containing a nickel compound selected from nickel oxide, nickel hydroxide, and mixtures thereof, and optionally including one or more oxides or hydroxides of a transition metal selected from cobalt, iron, chromium, titanium, manganese and vanadium, together with between about a 10 and about a 25% stoichiometric excess of lithium hydroxide. The mixture is heat treated at a temperature above about 600.degree. C.Type: GrantFiled: July 23, 1990Date of Patent: November 23, 1993Assignee: Her Majesty the Queen in right of the Province of British ColumbiaInventors: Jeffery R. Dahn, Rosamaria Fong, Ulrich Von Sacken
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Patent number: 5130211Abstract: A secondary electrochemical cell including a first electrode and a counteectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of the electrodes and an electrolyte solution containing an organic solvent, a salt of the alkali metal and at least one sequestering agent capable of complexing with the alkali moiety of the electrolyte salt, wherein the first electrode includes a carbon composition having a degree of graphitization greater than about 0.40.Type: GrantFiled: October 24, 1990Date of Patent: July 14, 1992Assignee: Her Majesty the Queen in right of the Provence of British ColumbiaInventors: David P. Wilkinson, Jeffery R. Dahn
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Patent number: 4969254Abstract: An electrode precursor for lithium batteries includes a layer of an electrochemically active particulate material and a binder. The binder is soluble in the cell electrolyte so that the electrolyte extracts the binder from the particulate material after assembly, leaving a particulate layer substantially devoid of binder. Thus, the binder does not significantly decrease electrical conductivity of the layer in the cell and does not impede the ionic access to the layer. The soluble binder may be present in the electrode precursor in an amount sufficient to protect particulate which would otherwise react with the atmosphere.Type: GrantFiled: December 8, 1989Date of Patent: November 13, 1990Assignee: Moli Energy LimitedInventors: Jeffery R. Dahn, David Wainwright
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Patent number: 4959282Abstract: Cathode-active material for electrochemial cells is prepared by reacting gamma phase MnO.sub.2 with Li. The molar ratio of Li to MnO.sub.2 is about 0.33 to about 0.43.Type: GrantFiled: July 11, 1988Date of Patent: September 25, 1990Assignee: Moli Energy LimitedInventors: Jeffery R. Dahn, Brian M. Way
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Patent number: 4902589Abstract: An electrode precursor for lithium batteries includes a layer of an electrochemically active particulate material and a binder. The binder is soluble in the cell electrolyte so that the electrolyte extracts the binder from the particulate material after assembly, leaving a particulate layer substantially devoid of binder. Thus, the binder does not significantly decrease electrical conductivity of the layer in the cell and does not impede the ionic access to the layer. The soluble binder may be present in the electrode precursor in an amount sufficient to protect particulate which would otherwise react with the atmosphere.Type: GrantFiled: June 8, 1988Date of Patent: February 20, 1990Assignee: Moli Energy LimitedInventors: Jeffery R. Dahn, David Wainwright