Patents by Inventor Jeffery Raymond Dahn
Jeffery Raymond 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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Patent number: 11961959Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.Type: GrantFiled: July 31, 2018Date of Patent: April 16, 2024Assignees: Tesla, Inc., Panasonic Holdings CorporationInventors: Lin Ma, Xiaowei Ma, Stephen Laurence Glazier, Jing Li, Jeffery Raymond Dahn
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Publication number: 20240072305Abstract: 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.Type: ApplicationFiled: October 6, 2023Publication date: February 29, 2024Inventors: Jeffery Raymond Dahn, Xiaowei Ma
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Patent number: 11824160Abstract: 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.Type: GrantFiled: July 5, 2018Date of Patent: November 21, 2023Assignees: Tesla, Inc., Panasonic Holdings CorporationInventors: Jeffery Raymond Dahn, Xiaowei Ma
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Publication number: 20230029852Abstract: 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: ApplicationFiled: June 30, 2022Publication date: February 2, 2023Inventors: David S. Hall, Jeffery Raymond Dahn, Toren Hynes
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Patent number: 11384058Abstract: 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: GrantFiled: June 13, 2019Date of Patent: July 12, 2022Assignees: PANASONIC HOLDINGS CORPORATION, TESLA, INC.Inventors: David S. Hall, Jeffery Raymond Dahn, Toren Hynes
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Patent number: 11152609Abstract: Compositions and methods of preparing energy storage device electrode active materials and electrodes are described. A two-step synthesis process may be utilized to prepare single crystal electrode active materials and electrodes, such as a single crystal nickel-cobalt-aluminum material. In some embodiments, the two step synthesis process includes a first and a second lithiation step.Type: GrantFiled: February 1, 2019Date of Patent: October 19, 2021Assignee: Panasonic CorporationInventors: Hongyang Li, Jing Li, Jeffery Raymond Dahn
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Publication number: 20200392091Abstract: 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: ApplicationFiled: June 13, 2019Publication date: December 17, 2020Applicant: Tesla Motors Canada ULCInventors: David S. Hall, Jeffery Raymond Dahn, Toren Hynes
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Patent number: 10784530Abstract: 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: GrantFiled: July 25, 2018Date of Patent: September 22, 2020Assignee: Tesla, Inc.Inventors: Jeffery Raymond Dahn, Toren Hynes, David Scott Hall
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Publication number: 20200251769Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.Type: ApplicationFiled: July 31, 2018Publication date: August 6, 2020Inventors: Lin Ma, Xiaowei Ma, Stephen Laurence Glazier, Jing LI, Jeffery Raymond Dahn
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Publication number: 20200127280Abstract: 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: ApplicationFiled: February 1, 2019Publication date: April 23, 2020Applicant: Tesla Motors Canada ULCInventors: Hongyang Li, Jing Li, Jeffery Raymond Dahn
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Publication number: 20190393546Abstract: 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: ApplicationFiled: July 25, 2018Publication date: December 26, 2019Applicant: Tesla Motors Canada ULCInventors: Jeffery Raymond Dahn, Toren Hynes, David Scott Hall
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Publication number: 20190280334Abstract: 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: ApplicationFiled: August 7, 2018Publication date: September 12, 2019Applicant: Tesla Motors Canada ULCInventors: Jeffery Raymond Dahn, Xiaowei Ma, Stephen Laurence Glazier, Robert Scott Young
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Publication number: 20190280333Abstract: 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.Type: ApplicationFiled: July 5, 2018Publication date: September 12, 2019Applicant: Tesla Motors Canada ULCInventors: Jeffery Raymond Dahn, Xiaowei Ma
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Publication number: 20030068556Abstract: Carbonaceous insertion compounds and methods for preparation are described wherein the compounds comprise a highly disordered, impurity free, hard pre-graphitic carbonaceous host. Carbonaceous insertion compounds can be prepared which have large reversible capacity for lithium yet low irreversible capacity and voltage hysteresis. Such insertion compounds can be prepared by simple pyrolysis of suitable epoxy, phenolic resin, or carbohydrate precursors at an appropriate temperature. These insertion compounds may be suitable for use as high capacity anodes in lithium ion batteries.Type: ApplicationFiled: November 13, 2001Publication date: April 10, 2003Inventors: Jiayu Simon Xue, Alfred MacDonald Wilson, Jeffery Raymond Dahn, Yinghu Liu, Ulrich von Sacken, Qiming Zhong, Tao Zheng
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Patent number: 6306541Abstract: A lithium ion battery electrode formed by the pyrolysis of a silane 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: October 23, 2001Assignee: Dow Corning CorporationInventors: Jeffery Raymond Dahn, Alf M. Wilson, Weibing Xing, Gregg Alan Zank
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Patent number: 5961950Abstract: Lithiated manganese oxides are synthesized using a novel two stage process. Using appropriate starting materials, lithiation is accomplished via low temperature ion exchange in aqueous warm salt solution. A drying stage follows which completes the synthesis. Materials suitable for use as cathodes in lithium ion rechargeable batteries have been prepared in this way. Other solid solution transition metal materials might also be prepared using a similar low temperature ion exchange process.Type: GrantFiled: December 29, 1997Date of Patent: October 5, 1999Assignee: NEC Moli Energy (Canada) LimitedInventors: Jeffery Raymond Dahn, Erik Rossen, Jan N. Reimers, Eric Wayne Fuller
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Patent number: 5907899Abstract: A lithium ion battery electrode formed by the pyrolysis of a polycarbosilane 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: June 1, 1999Assignee: Dow Corning CorporationInventors: Jeffery Raymond Dahn, Alf M. Wilson, Weibing Xing, Gregg Alan Zank
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Patent number: 5824280Abstract: A lithium ion battery electrode formed by the pyrolysis of a siloxane polymer of the structure(R.sup.1 R.sup.2 R.sup.3 SiO.sub.0.5).sub.w (R.sup.4 R.sup.5 SiO).sub.x (R.sup.6 SiO.sub.1.5).sub.y (SiO.sub.4/2).sub.zfollowed by introducing lithium ions. In this structure, each R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently selected from the group consisting of hydrogen and a hydrocarbon, w is in the range of 0 to about 0.8, x is in the range of 0 to about 0.9, y is in the range of 0 to about 0.9, z is in the range of 0 to 1 and w+x+y+z=1.Type: GrantFiled: June 11, 1996Date of Patent: October 20, 1998Assignee: Dow Corning CorporationInventors: Jeffery Raymond Dahn, Katsuya Eguchi, Alf M. Wilson, Weibing Xing, Gregg Alan Zank
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Patent number: 5700597Abstract: Spinel insertion compounds Li.sub.1+x Mn.sub.2-x-y M.sub.y O.sub.4 wherein M is a transition metal, 0<x< about 0.33, 0.ltoreq.y<about 1, can have relatively low surface area at relatively large values of x when prepared with a novel two step heating method. Li.sub.1 Mn.sub.2-y M.sub.y O.sub.4 is first prepared between a critical temperature, T.sub.c, and about 900.degree. C. Then, a lithium salt is mixed therewith and reacted at a temperature between about 400.degree. C. and T.sub.c. These compounds are suitable for use as a cathode in a lithium battery. The use of LiCl as the lithium salt can provide improved cycle life results in such a battery.Type: GrantFiled: December 6, 1995Date of Patent: December 23, 1997Assignee: Moli Energy (1990) LimitedInventors: Qiming Zhong, Ulrich Von Sacken, Yuan Gao, Jeffery Raymond Dahn
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Patent number: 5698340Abstract: Carbonaceous insertion compounds and methods for preparation are described wherein the compounds comprise silicon and oxygen and are characterized by x-ray diffraction patterns that resemble that of amorphous silicon dioxide. The compounds can exhibit a large reversible capacity for lithium and can be prepared by simple pyrolysis of suitable polymer/s containing silicon, oxygen and carbon at an appropriate temperature. These insertion compounds may be suitable for use as high capacity anodes in lithium ion batteries.Type: GrantFiled: June 19, 1996Date of Patent: December 16, 1997Assignee: Moli Energy (1990) LimitedInventors: Jiayu Simon Xue, Jeffery Raymond Dahn