公开(公告)号：US10135065B2

公开(公告)日：2018-11-20

申请号：US15015096

申请日：2016-02-03

Applicant: Microvast Power Systems Co., Ltd.

Inventor： Wenjuan Mattis ,  Huijie Guo

IPC: H01M4/04 ,  H01M4/52 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/58 ,  C01G53/04

Abstract: The present invention provides a composite anode material including nickel oxide, a method for preparing the composite anode material, and a lithium ion battery using the composite anode material. The composite anode material has a core-shell structure, the inner core is an inert core comprising a non-active material, and the outer shell comprises an anode active material of nickel oxide. The composite anode material with core-shell structure in the present invention overcomes the problem of volume changing and chalking of nickel oxide during charging/discharging and obtains a better cycle performance and rate performance.

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：US11978887B2

公开(公告)日：2024-05-07

申请号：US16643561

申请日：2018-08-30

Applicant: Microvast Power Systems Co., LTD.

Inventor： Bryan T. Yonemoto ,  Huijie Guo ,  Xiao Zhang ,  Zhifeng Zhang ,  Xuelei Sun ,  Tianshu Deng

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

CPC classification number: H01M4/364 ,  C01G53/006 ,  C01G53/44 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: A method of preparing cathode particles using a co-precipitation reaction in a reactor is disclosed. A feed stream (a) containing metal cations is fed into the reactor, and a feed stream (b) containing anions is fed into the reactor, wherein a ratio of the metal cations in the feed stream (a) is continuously changed from A1 at time t1 to A2 at time t2. The feed stream (a) and the feed stream (b) are contacted in the reactor to form precipitated precursor particles, and at least one transition metal component in the particle has a non-linear continuous concentration gradient profile over at least a portion along a thickness direction of the particle.

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：US20160226062A1

公开(公告)日：2016-08-04

申请号：US15015096

申请日：2016-02-03

Applicant: Microvast Power Systems Co., Ltd.

Inventor： Wenjuan Mattis ,  Huijie Guo

IPC: H01M4/36 ,  H01M4/52 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/366 ,  C01G53/04 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122 ,  Y02T10/7011

Abstract: The present invention provides a composite anode material including nickel oxide, a method for preparing the composite anode material, and a lithium ion battery using the composite anode material. The composite anode material has a core-shell structure, the inner core is an inert core comprising a non-active material, and the outer shell comprises an anode active material of nickel oxide. The composite anode material with core-shell structure in the present invention overcomes the problem of volume changing and chalking of nickel oxide during charging/discharging and obtains a better cycle performance and rate performance.

Abstract translation: 本发明提供了包含氧化镍的复合阳极材料，制备复合阳极材料的方法和使用该复合阳极材料的锂离子电池。 复合阳极材料具有核 - 壳结构，内芯是包含非活性材料的惰性芯，外壳包含氧化镍的负极活性材料。 本发明的具有核 - 壳结构的复合阳极材料克服了在充放电期间氧化镍体积变化和粉化的问题，并且获得了更好的循环性能和速率性能。