Patents Assigned to NANOGRAF CORPORATION
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Patent number: 11929494Abstract: An electrode material for a lithium ion secondary battery and method of forming the same, the electrode material including composite particles, each composite particle including: a primary particle including an electrochemically active material; and an envelope disposed on the surface of the primary particle. The envelope includes turbostratic carbon having a Raman spectrum having: a D band having a peak intensity (ID) at wave number between 1330 cm-1 and 1360 cm-1; a G band having a peak intensity (IG) at wave number between 1530 cm-1 and 1580 cm-1; and a 2D band having a peak intensity (I2D) at wave number between 2650 cm-1 and 2750 cm-1. In one embodiment, a ratio of ID/IG ranges from greater than zero to about 1.1, and a ratio of I2D/IG ranges from about 0.4 to about 2.Type: GrantFiled: January 10, 2023Date of Patent: March 12, 2024Assignee: NANOGRAF CORPORATIONInventors: Joshua J. Lau, Aaron Yost, James McKinney, Cary Michael Hayner, Jack Cavanaugh, Seonbaek Ha
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Patent number: 11916221Abstract: Composite anode materials and methods of making same, the anode materials including capsules including graphene, reduced graphene oxide, graphene oxide, or a combination thereof, and particles of an active material disposed inside of the capsules. The particles may each include a core and a buffer layer surrounding the core. The core may include crystalline silicon, and the buffer layer may include a silicon oxide, a lithium silicate, carbon, or a combination thereof.Type: GrantFiled: September 23, 2020Date of Patent: February 27, 2024Assignee: NANOGRAF CORPORATIONInventors: James McKinney, Cary M. Hayner, Joshua J. Lau, Seonbaek Ha, Francis Wang
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Patent number: 11670763Abstract: An electrode material for a lithium ion secondary battery and method of forming the same, the electrode material including composite particles, each composite particle including a primary particle including thermally disproportionated silicon oxide, and an envelope disposed on the surface of the primary particle. The envelope includes turbostratic carbon having a Raman spectrum having: a D band having a peak intensity (ID) at wave number between 1330 cm?1 and 1360 cm?1; a G band having a peak intensity (IG) at wave number between 1530 cm?1 and 1600 cm?1; and a 2D band having a peak intensity (I2D) at wave number between 2650 cm?1 and 2750 cm?1, wherein a ratio of ID/IG ranges from greater than zero to about 1.0, and a ratio of I2D/IG ranges from about 0.4 to about 2.Type: GrantFiled: November 5, 2020Date of Patent: June 6, 2023Assignee: NANOGRAF CORPORATIONInventors: Cary Hayner, Seonbaek Ha, Kathryn Hicks, Joshua Lau, Christine Frysz
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Patent number: 11588150Abstract: An electrode material for a lithium ion secondary battery and method of forming the same, the electrode material including composite particles, each composite particle including: a primary particle including an electrochemically active material; and an envelope disposed on the surface of the primary particle. The envelope includes turbostratic carbon having a Raman spectrum having: a D band having a peak intensity (ID) at wave number between 1330 cm?1 and 1360 cm?1; a G band having a peak intensity (IG) at wave number between 1530 cm?1 and 1580 cm?1; and a 2D band having a peak intensity (I2D) at wave number between 2650 cm?1 and 2750 cm?1. In one embodiment, a ratio of ID/IG ranges from greater than zero to about 1.1, and a ratio of I2D/IG ranges from about 0.4 to about 2.Type: GrantFiled: May 18, 2020Date of Patent: February 21, 2023Assignee: NANOGRAF CORPORATIONInventors: Joshua J. Lau, Aaron Yost, James McKinney, Cary Michael Hayner, Jack Cavanaugh, Seonbaek Ha
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Patent number: 11189825Abstract: An electrochemically active material including composite particles that each include a graphene-based material shell surrounding nanoparticles of a core material. The composite particles may include a BET surface area of less than about 75 m2/g. The electrochemically active material may be formed into an electrode incorporated within a lithium ion electrochemical cell.Type: GrantFiled: November 14, 2016Date of Patent: November 30, 2021Assignee: NANOGRAF CORPORATIONInventors: Cary Michael Hayner, Francis Wang, Christine A. Frysz
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Patent number: 11171325Abstract: A negative electrode of a lithium ion electrochemical cell, the negative electrode including an active electrode material that includes a first component and a second component. The first component may include graphene, silicon, or a combination thereof. The second component may include silicon. The active electrode material may include particles in which the second component is encapsulated by the first component. The negative electrode may have an internal porosity of between 40 to 60 percent.Type: GrantFiled: July 11, 2016Date of Patent: November 9, 2021Assignee: NANOGRAF CORPORATIONInventors: Joshua J. Lau, Cary M. Hayner, Seonbaek Ha, James Mckinney, Francis Wang, Christine A. Frysz
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Patent number: 11069919Abstract: A lithium ion electrochemical cell is described in which the lithium comprising further comprises a lithiation agent. The lithiation agent, which comprises a lithium constituent, is designed to provide an excess source of lithium to minimize capacity loss of the lithium ion electrochemical cell. The anode of the lithium ion cell comprises a material matrix comprising carbon, graphene and an active element such as silicon or tin.Type: GrantFiled: January 8, 2020Date of Patent: July 20, 2021Assignee: NANOGRAF CORPORATIONInventors: Cary Michael Hayner, Rachid Amine, Christine A. Frysz
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Patent number: 10873075Abstract: A composite anode material including an active material including a core of silicon, silicon oxide, or combination thereof encased within a buffer layer including a polymeric material, and a shell encapsulating the active material. The shell may include graphene, graphene oxide, partially reduced graphene oxide, or combinations thereof.Type: GrantFiled: September 1, 2017Date of Patent: December 22, 2020Assignee: NANOGRAF CORPORATIONInventors: Seonbaek Ha, Cary M. Hayner, Joshua J. Lau, James McKinney, Francis Wang, Woo Hyun Chae
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Patent number: 10804530Abstract: Composite anode materials and methods of making same, the anode materials including capsules including graphene, reduced graphene oxide, graphene oxide, or a combination thereof, and particles of an active material disposed inside of the capsules. The particles may each include a core and a buffer layer surrounding the core. The core may include crystalline silicon, and the buffer layer may include a silicon oxide, a lithium silicate, carbon, or a combination thereof.Type: GrantFiled: August 3, 2017Date of Patent: October 13, 2020Assignee: NANOGRAF CORPORATIONInventors: James McKinney, Cary M. Hayner, Joshua J. Lau, Seonbaek Ha, Francis Wang
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Patent number: 10608279Abstract: A lithium ion electrochemical cell is described in which the lithium comprising further comprises a lithiation agent. The lithiation agent, which comprises a lithium constituent, is designed to provide an excess source of lithium to minimize capacity loss of the lithium ion electrochemical cell. The anode of the lithium ion cell comprises a material matrix comprising carbon, graphene and an active element such as silicon or tin.Type: GrantFiled: October 29, 2018Date of Patent: March 31, 2020Assignee: NANOGRAF CORPORATIONInventors: Cary Michael Hayner, Rachid Amine, Christine A. Frysz