Patents by Inventor BRYAN YONEMOTO

BRYAN YONEMOTO 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).

  • Publication number: 20240372141
    Abstract: The present invention provides an electrolyte for a secondary battery and a secondary battery including same. The electrolyte for a secondary battery comprises a solvent comprising a compound having a structure represented by Formula, wherein R is selected from H, F, CH3 and CF3; R? and R? are each independently selected from H, CH3, CH2CH3, CF3, CH2CF3 and CF2CH3; and wherein based on the total weight of the solvent, the amount of the compound represented by formula I ranges from 81 wt % to 99 wt %; or the amount of the compound represented by formula I ranges from 90 wt % to 99 wt % By using the electrolyte for a secondary battery and the secondary battery including same of the present invention, the formed SEI film is more stable thereby prevent the electrolyte further reduced by anode, and increased battery life and cycle stability could be achieved.
    Type: Application
    Filed: May 4, 2023
    Publication date: November 7, 2024
    Inventors: Yun Xu, Bryan Yonemoto, Han Jiang
  • Patent number: 12136730
    Abstract: The disclosure provides a modified positive electrode material, a preparation method therefor, and a lithium ion battery. The modified positive electrode material includes a core and a coating layer. The core contains Mn and Ni, the coating layer includes a first oxide coating layer coating on a surface of the core. A first element forming the first oxide coating layer is selected from one or more of a group of Si, Ti, V, Zr, Mo, W, Bi, Nb, and Ru. The first element with a high-valent state can partially enter the surface core structure of the positive electrode material to occupy the sites of manganese ions, and form a chemical bond stronger than a Mn—O. Thus, O and Mn in the core structure are difficult to precipitate, and the coating layer is difficult to fall off in cycle process. Moreover, structural stability of the modified positive electrode material is improved.
    Type: Grant
    Filed: November 25, 2021
    Date of Patent: November 5, 2024
    Assignees: Microvast Power Systems Co., Ltd., Microvast, .Inc.
    Inventors: Bryan Yonemoto, Huijie Guo, Wenjuan Liu Mattis
  • Patent number: 12006229
    Abstract: The present disclosure provides a method for preparing full-gradient particle precursors, and the full-gradient particle precursor prepared thereby. By controlling different types of anion compositions and/or cation compositions gradually changed to other types, and adjusting the pH to match with the species, precipitated particles are deposited to form a slurry, collecting the precipitated particle, treating with water, and drying to yield the particle precursor. After being washed and dried, the particle precursor is further mixed with lithium source, after calcining to yield cathode active particles. The cathode active particles can be used to prepare cathode of lithium-ion battery.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: June 11, 2024
    Assignee: MICROVAST ADVANCED MATERIALS INC.
    Inventors: Bryan Yonemoto, Xiao Zhang
  • Publication number: 20240072300
    Abstract: A solid state electrolyte is provided, which includes a ligand composed of a ceramic powder and a nitrogen containing aromatic copolymer, the ceramic powder is the core and the receptor, the nitrogen containing aromatic copolymer is comprised by a first polymer and a second polymer, the first polymer is aromatic polyamide, the second polymer is selected from the group consisting of P2VP, P4VP, PVA, PEO and PAN. The solid state electrolyte can form good contact interfaces at the anode and cathode electrodes. A lithium-ion battery including the solid state electrolyte is also provided.
    Type: Application
    Filed: January 31, 2022
    Publication date: February 29, 2024
    Applicants: Microvast Power Systems Co., Ltd., Microvast, Inc.
    Inventors: Wenjuan Liu MATTIS, Jinbo HE, Bryan YONEMOTO
  • Patent number: 11679992
    Abstract: The invention relates to a method for preparing core-shell structured particle precursor under a co-precipitation reaction. In this method, by controlling the feeding of different types of anion compositions and/or cation compositions, and adjusting the pH to match with the species, precipitated particles are deposited to form a precipitated particle slurry, filtering, and drying the precipitated particle slurry to yield the particle precursor. The invention also provides a particle precursor which includes a core-shell structure. The shell is made of gradient anions and/or cations. Such particle precursor can be used to prepare cathode of lithium-ion battery.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: June 20, 2023
    Assignee: MICROVAST POWER SYSTEMS CO., LTD.
    Inventors: Bryan Yonemoto, Xiao Zhang
  • Publication number: 20220278326
    Abstract: A cathode active material and a Lithium-ion electrochemical system thereof are provided. The lithium-ion cathode material is described by xLiMO2*(1-x)(LiaM?1-a)Oy, M and M? independently comprises one or more metal ions that together have a combined average oxidation state between 3+ or 2+, x is selected from 0.25 to 1, a is selected from 0 to 0.75, and y is selected from 0.625 to 1.
    Type: Application
    Filed: May 14, 2022
    Publication date: September 1, 2022
    Inventors: Bryan YONEMOTO, Karima LASRI, Xiao ZHANG
  • Patent number: 11367873
    Abstract: A cathode active material and a Lithium-ion electrochemical system thereof are provided. The lithium-ion cathode material is described by xLiMO2*(1?x)(LiaM?1?a)Oy, M and M? independently comprises one or more metal ions that together have a combined average oxidation state between 3+ or 2+, 1>x?0.5, 0.75?a>0, 1?y?0.625.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: June 21, 2022
    Assignee: Microvast Power Systems Co., Ltd.
    Inventors: Bryan Yonemoto, Karima Lasri, Xiao Zhang
  • Patent number: 11322738
    Abstract: The invention relates to a method for preparing cathode particles under a co-precipitation reaction by feeding NaOH and metal sulfate solution into different vessels. The invention further provides a cathode active material having the cathode particles. By the method of the invention, the number density distribution of prepared particles is much smaller than feeding NaOH and metal sulfate together into same vessel.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: May 3, 2022
    Assignee: MICROVAST POWER SYSTEMS CO., LTD.
    Inventors: Bryan Yonemoto, Xiao Zhang
  • Publication number: 20210032122
    Abstract: The invention relates to a method for preparing core-shell structured particle precursor under a co-precipitation reaction. In this method, by controlling the feeding of different types of anion compositions and/or cation compositions, and adjusting the pH to match with the species, precipitated particles are deposited to form a precipitated particle slurry, filtering, and drying the precipitated particle slurry to yield the particle precursor. The invention also provides a particle precursor which includes a core-shell structure. The shell is made of gradient anions and/or cations. Such particle precursor can be used to prepare cathode of lithium-ion battery.
    Type: Application
    Filed: June 11, 2019
    Publication date: February 4, 2021
    Inventors: BRYAN YONEMOTO, XIAO ZHANG
  • Publication number: 20210017040
    Abstract: The invention relates to a method for preparing transitional-metal particles (cathode particle precursor) under a co-precipitation reaction. In this method, by feeding different types of anion compositions and/or cation compositions, and adjusting the pH to match with the species, precipitated particles are deposited to form a slurry, colleting the slurry, treating with water, and drying to get a cathode particle precursor. Mixing the cathode particle precursor with a lithium source and calcining to yield core-shell structured cathode active particles. Such cathode active particle can be used to prepare cathode of lithium-ion battery.
    Type: Application
    Filed: May 21, 2019
    Publication date: January 21, 2021
    Inventors: BRYAN YONEMOTO, XIAO ZHANG, HUIJIE GUO, JIANZHAO LIU
  • Publication number: 20210020913
    Abstract: The present disclosure provides a method for preparing full-gradient particle precursors, and the full-gradient particle precursor prepared thereby. By controlling different types of anion compositions and/or cation compositions gradually changed to other types, and adjusting the pH to match with the species, precipitated particles are deposited to form a slurry, collecting the precipitated particle, treating with water, and drying to yield the particle precursor. After being washed and dried, the particle precursor is further mixed with lithium source, after calcining to yield cathode active particles. The cathode active particles can be used to prepare cathode of lithium-ion battery.
    Type: Application
    Filed: June 11, 2019
    Publication date: January 21, 2021
    Inventors: BRYAN YONEMOTO, XIAO ZHANG
  • Patent number: 10782272
    Abstract: An analytical method for precipitated particles using a co-precipitation reaction in includes feeding streams and a tracking metal into a reaction vessel; collecting a precipitated product containing the tracking metal from the reaction vessel in increments of time to obtain product samples; filtering each collected product sample to separate precipitated particles from filtrate; and performing elemental analysis for the tracking metal in the precipitated particles of each collected product sample and measuring a concentration of the tracking metal in the precipitated particles, to obtain a residence time distribution of the precipitated particles in the reaction vessel according to the concentration of the tracking metal in the precipitated particles. Therefore the preferred residence time of the precipitated particles in the reaction vessel can be ascertained, so that it is clear when the precipitated particles should be collected from the reaction vessel.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: September 22, 2020
    Assignee: MICROVAST POWER SYSTEMS CO., LTD.
    Inventors: Bryan Yonemoto, Xiao Zhang, Wenjuan Liu Mattis, Zhifeng Zhang
  • Publication number: 20200131046
    Abstract: A method for producing cathode particles is provided. The method includes: providing a plurality of precipitation zones from i=1 to N, wherein the precipitation zones are connected in series, each precipitation zone comprises a feed stream (ai) providing the precipitation cations, a feed stream (bi) providing the precipitation anions, a continuous outflow (ci) of precipitation particle slurry to the next precipitation zone, and a continuous inflow (ci?1) of precipitation particle slurry from the prior precipitation zone, and forming, in the precipitation zones, precipitated particles, and finally to form, in the precipitation zone N, precursor particles comprised of N layers, wherein layer i of each particle is precipitated and formed in the precipitation zone i, wherein N is not less than 3, and when i=1, there is no inflow (ci?1).
    Type: Application
    Filed: July 13, 2018
    Publication date: April 30, 2020
    Inventors: BRYAN YONEMOTO, WENJUAN LIU MATTIS, ZHIFENG ZHANG, XIAO ZHANG
  • Publication number: 20200119349
    Abstract: A cathode active material and a Lithium-ion electrochemical system thereof are provided. The lithium-ion cathode material is described by xLiMO2*(1-x)(LiaM?1-a)Oy, M and M? independently comprises one or more metal ions that together have a combined average oxidation state between 3+ or 2+, 1>x?0.5, 0.75?a>0, 1?y?0.625.
    Type: Application
    Filed: September 25, 2019
    Publication date: April 16, 2020
    Inventors: Bryan Yonemoto, Karima Lasri, Xiao ZHANG
  • Publication number: 20190312265
    Abstract: The invention relates to a method for preparing cathode particles under a co-precipitation reaction by feeding NaOH and metal sulfate solution into different vessels. The invention further provides a cathode active material having the cathode particles. By the method of the invention, the number density distribution of prepared particles is much smaller than feeding NaOH and metal sulfate together into same vessel.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Inventors: BRYAN YONEMOTO, XIAO ZHANG
  • Publication number: 20190017979
    Abstract: The present invention provides an analytical method for precipitated particles during co-precipitation reaction, comprising: running a co-precipitation reaction in a reaction vessel to form a precipitated product; injecting a tracking metal to the reaction vessel for a given time duration; collecting the precipitated product containing the tracking metal from the reaction vessel in increments of time to obtain multiple product samples; filtering each collected product sample to separate precipitated particles from filtrate; performing elemental analysis for the tracking metal in the precipitated particles of each collected product sample, to obtain the residence time distribution of the precipitated particles in the reaction vessel according to the concentration of the tracking metal in the precipitated particles.
    Type: Application
    Filed: July 16, 2018
    Publication date: January 17, 2019
    Inventors: BRYAN YONEMOTO, XIAO ZHANG, WENJUAN LIU MATTIS, ZHIFENG ZHANG