Patents by Inventor Yong Lak Joo

Yong Lak Joo 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).

  • Patent number: 11911784
    Abstract: Provided in certain embodiments herein are alternating current electrospray systems and processes for manufacturing depositions, such as thin layer depositions. In some embodiments, processes and systems provided herein are suitable for and configured to manufacture uniform depositions, such as having uniform thickness.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: February 27, 2024
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Yevgen Zhmayev
  • Patent number: 11814752
    Abstract: Described herein are nanofibers and methods for making nanofibers that include any one or more of (a) a non-homogeneous charge density; (b) a plurality of regions of high charge density; and/or (c) charged nanoparticles or chargeable nanoparticles. In one aspect, the present invention fulfills a need for filtration media that are capable of both high performance (e.g., removal of particle sizes between 0.1 and 0.5 ?m) with a low pressure drop, however the invention is not limited in this regard.
    Type: Grant
    Filed: November 4, 2021
    Date of Patent: November 14, 2023
    Assignee: Cornell University
    Inventors: Yong Lak Joo, Daehwan Cho, Alexander Naydich
  • Patent number: 11811034
    Abstract: Provided herein are positive electrodes for lithium batteries, particularly lithium sulfur batteries, and the manufacture thereof. Particularly, such electrodes have good performance characteristics, such as capacity and capacity retention, even at very high loading of sulfur (e.g., >5 mg/cm2), as well as flexibility. Exemplary manufacturing techniques include the electrospraying of sulfur (e.g., electrode active sulfur compounds), and an optional additive (e.g., a nanostructured conductive additive), onto a porous, conductive substrate (e.g., a porous carbon substrate, such as comprising multiple layers and/or domains).
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: November 7, 2023
    Assignee: Cornell University
    Inventors: Yong Lak Joo, Jaehyuk Lee
  • Patent number: 11769928
    Abstract: Provided herein are ceramic nanofibers and processes for preparing the same. In specific examples, provided herein are ceramic nanofiber mats for use as separators in batteries, particularly lithium ion batteries. In some embodiments, the separators described herein may include a nanofiber mat including at least one nanofiber having a continuous matrix material.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: September 26, 2023
    Assignee: Cornell University
    Inventors: Yong Lak Joo, Daehwan Cho, Yong Seok Kim
  • Patent number: 11728545
    Abstract: Lithium ion batteries, electrodes, nanofibers, and methods for producing same are disclosed herein. Provided herein are batteries having (a) increased energy density; (b) decreased pulverization (structural disruption due to volume expansion during lithiation/de-lithiation processes); and/or (c) increased lifetime. In some embodiments described herein, using high throughput, water-based electrospinning process produces nanofibers of high energy capacity materials (e.g., ceramic) with nanostructures such as discrete crystal domains, mesopores, hollow cores, and the like; and such nanofibers providing reduced pulverization and increased charging rates when they are used in anodic or cathodic materials.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: August 15, 2023
    Assignee: Cornell University
    Inventors: Yong Lak Joo, Nathaniel S. Hansen, Daehwan Cho, Kyoung Woo Kim
  • Patent number: 11713249
    Abstract: Provided herein are high throughput continuous or semi-continuous reactors and processes for manufacturing graphenic materials, such as graphene oxide. Such processes are suitable for manufacturing graphenic materials at rates that are up to hundreds of times faster than conventional techniques, have little batch-to-batch variation, have a high degree of tunability, and have excellent performance characteristics.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: August 1, 2023
    Assignees: CORNELL UNIVERSITY, AXIUM IP, LLC
    Inventors: Yong Lak Joo, Mohammed Alamer, Brian Williams
  • Patent number: 11626617
    Abstract: Provided herein are a variety of electrolytes, electrolyte systems, and separator systems, as well as batteries comprising the same and precursors thereof. In specific embodiments are semi-solid or gel electrolytes, particularly those prepared using (i) a cross-linkable polysilsesquioxane with high ionic conductivity and (ii) a liquid electrolyte (e.g., ionic liquid).
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: April 11, 2023
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Jin Hong Lee
  • Publication number: 20230082231
    Abstract: A coating layer for a substrate includes a coating material. The coating material includes graphene and/or graphene derivatives that reflect and/or absorb an electromagnetic (EM) wave having a frequency of above 20 GHz. The coating layer is deposited on a surface of the substrate.
    Type: Application
    Filed: September 10, 2021
    Publication date: March 16, 2023
    Inventors: Yong Lak Joo, Naman Gupta, Somayeh Zamani, Yash Joshi, Ryota Okumura, Shinichi Ito, Elizabeth Izor
  • Publication number: 20220396487
    Abstract: Provided herein are high throughput continuous or semi-continuous reactors and processes for manufacturing expanded graphite materials. Such processes are suitable for manufacturing expanded graphite materials with little batch-to-batch variation.
    Type: Application
    Filed: June 25, 2020
    Publication date: December 15, 2022
    Inventors: Yong Lak JOO, Mohammed ALAMER
  • Publication number: 20220223867
    Abstract: Provided herein are high performance electrodes, electrode materials comprising a plurality of active electrode material-containing particles secured within one or more graphenic web, and precursors thereof. Also provided herein are processes of generating the same by an electrospray process.
    Type: Application
    Filed: April 1, 2022
    Publication date: July 14, 2022
    Inventors: Yong Lak Joo, Ling Fei
  • Patent number: 11383252
    Abstract: Provided in certain embodiments herein are gas controlled electrospray systems and processes for manufacturing depositions, such as thin layer films. In some embodiments, processes and systems provided herein are suitable for and configured to manufacture uniform depositions, such as having uniform thickness.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 12, 2022
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Yevgen Zhmayev
  • Publication number: 20220186403
    Abstract: Described herein are nanofibers and methods for making nanofibers that include any one or more of (a) a non-homogeneous charge density; (b) a plurality of regions of high charge density; and/or (c) charged nanoparticles or chargeable nanoparticles. In one aspect, the present invention fulfills a need for filtration media that are capable of both high performance (e.g., removal of particle sizes between 0.1 and 0.5 ?m) with a low pressure drop, however the invention is not limited in this regard.
    Type: Application
    Filed: November 4, 2021
    Publication date: June 16, 2022
    Applicant: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Daehwan Cho, Alexander Naydich
  • Patent number: 11352717
    Abstract: Described herein are nanofibers and methods for making nanofibers that include any one or more of (a) a non-homogeneous charge density; (b) a plurality of regions of high charge density; and/or (c) charged nanoparticles or chargeable nanoparticles. In one aspect, the present invention fulfills a need for filtration media that are capable of both high performance (e.g., removal of particle sizes between 0.1 and 0.5 ?m) with a low pressure drop, however the invention is not limited in this regard.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: June 7, 2022
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Daehwan Cho, Alexander Naydich
  • Patent number: 11302920
    Abstract: Provided herein are high performance electrodes, electrode materials comprising a plurality of active electrode material-containing particles secured within one or more graphenic web, and precursors thereof. Also provided herein are processes of generating the same by an electrospray process.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: April 12, 2022
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Ling Fei
  • Publication number: 20220098759
    Abstract: Provided herein are electrospinning systems, apparatuses, components, and processes for the preparation of nanofibers, including high throughput systems, apparatuses, and processes for producing high performance nanofibers.
    Type: Application
    Filed: December 13, 2021
    Publication date: March 31, 2022
    Applicant: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Kyoung Woo Kim
  • Publication number: 20220048053
    Abstract: Provided in certain embodiments herein are alternating current electrospray systems and processes for manufacturing depositions, such as thin layer depositions. In some embodiments, processes and systems provided herein are suitable for and configured to manufacture uniform depositions, such as having uniform thickness.
    Type: Application
    Filed: October 29, 2021
    Publication date: February 17, 2022
    Inventors: Yong Lak Joo, Yevgen Zhmayev
  • Patent number: 11224884
    Abstract: Provided in certain embodiments herein are alternating current electrospray systems and processes for manufacturing depositions, such as thin layer depositions. In some embodiments, processes and systems provided herein are suitable for and configured to manufacture uniform depositions, such as having uniform thickness.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: January 18, 2022
    Assignee: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Yevgen Zhmayev
  • Publication number: 20210399384
    Abstract: Lithium ion batteries, electrodes, nanofibers, and methods for producing same are disclosed herein. Provided herein are batteries having (a) increased energy density; (b) decreased pulverization (structural disruption due to volume expansion during lithiation/de-lithiation processes); and/or (c) increased lifetime. In some embodiments described herein, using high throughput, water-based electrospinning process produces nanofibers of high energy capacity materials (e.g., ceramic) with nanostructures such as discrete crystal domains, mesopores, hollow cores, and the like; and such nanofibers providing reduced pulverization and increased charging rates when they are used in anodic or cathodic materials.
    Type: Application
    Filed: June 28, 2021
    Publication date: December 23, 2021
    Applicant: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Nathaniel S. Hansen, Daehwan Cho, Kyoung Woo Kim
  • Publication number: 20210340013
    Abstract: Provided herein are high throughput continuous or semi-continuous reactors and processes for manufacturing graphenic materials, such as graphene. Such processes are suitable for manufacturing graphenic materials at rates that are up to hundreds of times faster than conventional techniques, and have little batch-to-batch variation. Also provided herein are graphenic compositions of matter, including large, high quality and/or highly uniform graphene.
    Type: Application
    Filed: October 9, 2019
    Publication date: November 4, 2021
    Inventors: Yong Lak Joo, Mohammed Alamer, Brian Williams
  • Publication number: 20210283084
    Abstract: Provided herein are nanofibers and processes of preparing nanofibers. In some instances, the nanofibers are metal and/or ceramic nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.
    Type: Application
    Filed: May 26, 2021
    Publication date: September 16, 2021
    Applicant: CORNELL UNIVERSITY
    Inventors: Yong Lak Joo, Nathaniel S. Hansen, Daehwan Cho