公开(公告)号：US12136730B2

公开(公告)日：2024-11-05

申请号：US17535602

申请日：2021-11-25

Applicant: Microvast Power Systems Co., Ltd. ,  Microvast, Inc.

Inventor： Bryan Yonemoto ,  Huijie Guo ,  Wenjuan Liu Mattis

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

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.

公开(公告)号：US12234158B2

公开(公告)日：2025-02-25

申请号：US17043610

申请日：2019-05-21

Applicant: Microvast Power Systems Co., LTD.

Inventor： Bryan Yonemoto ,  Xiao Zhang ,  Huijie Guo ,  Jianzhao Liu

IPC: C01G53/00 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/525 ,  H01M4/02

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.

公开(公告)号：US11679992B2

公开(公告)日：2023-06-20

申请号：US17043623

申请日：2019-06-11

Applicant: Microvast Power Systems Co., LTD.

Inventor： Bryan Yonemoto ,  Xiao Zhang

IPC: C01G53/00 ,  B01J4/00 ,  C01G53/06 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  B01J19/00 ,  H01M4/139 ,  H01M4/13 ,  H01M10/0525 ,  H01M4/02

CPC classification number: C01G53/006 ,  B01J4/008 ,  B01J19/0086 ,  C01G53/06 ,  H01M4/0497 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/525 ,  B01J2204/002 ,  B01J2219/00177 ,  B01J2219/00186 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/40 ,  H01M10/0525 ,  H01M2004/028

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.

公开(公告)号：US12006229B2

公开(公告)日：2024-06-11

申请号：US17043649

申请日：2019-06-11

Applicant: Microvast Power Systems Co., LTD.

Inventor： Bryan Yonemoto ,  Xiao Zhang

IPC: H01M4/1391 ,  B01J4/00 ,  B01J19/00 ,  C01G53/00 ,  C01G53/06 ,  H01M4/04 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/525 ,  H01M4/02 ,  H01M10/0525

CPC classification number: C01G53/006 ,  B01J4/008 ,  B01J19/0086 ,  C01G53/06 ,  H01M4/0497 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/525 ,  B01J2204/002 ,  B01J2219/00177 ,  B01J2219/00186 ,  C01P2002/52 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/40 ,  H01M2004/028 ,  H01M10/0525

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.

公开(公告)号：US11367873B2

公开(公告)日：2022-06-21

申请号：US16581802

申请日：2019-09-25

Applicant: Microvast Power Systems Co., Ltd.

Inventor： Bryan Yonemoto ,  Karima Lasri ,  Xiao Zhang

IPC: H01M4/525 ,  H01M4/505

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.

公开(公告)号：US11322738B2

公开(公告)日：2022-05-03

申请号：US16378554

申请日：2019-04-08

Applicant: Microvast Power Systems Co., LTD.

Inventor： Bryan Yonemoto ,  Xiao Zhang

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/48 ,  C01G53/00 ,  H01M4/505 ,  H01M4/02

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.

公开(公告)号：US10782272B2

公开(公告)日：2020-09-22

申请号：US16035725

申请日：2018-07-16

Applicant: Microvast Power Systems Co., Ltd.

Inventor： Bryan Yonemoto ,  Xiao Zhang ,  Wenjuan Liu Mattis ,  Zhifeng Zhang

IPC: G01N31/22 ,  G01N31/02 ,  B01J19/00 ,  B01J8/00 ,  C01G19/02 ,  C01F11/24 ,  C01G53/00

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.