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：US10797363B2

公开(公告)日：2020-10-06

申请号：US16172899

申请日：2018-10-29

Applicant: Microvast Power Systems Co., Ltd.

Inventor： Wenjuan Liu Mattis ,  Bryan T. Yonemoto ,  Yuehui Yin ,  Xiangchao Kong ,  Xuelei Sun

IPC: H01M10/54 ,  H01M6/52 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/131 ,  C01G53/00 ,  H01M4/525 ,  C01G45/12 ,  H01M4/36 ,  H01M4/02

Abstract: Provided is a method for recycling and refreshing a cathode material, a refreshed cathode material and a lithium ion battery. The method for recycling and refreshing the cathode material includes: 1) a cathode material recycled from a waste battery is mixed with a manganiferous salt solution; 2) an alkali aqueous solution is added to the mixture to react to obtain a manganese hydroxide coating cathode material; and 3) the manganese hydroxide coating cathode material is sintered with a lithium resource to obtain a refreshed cathode material. The refreshed cathode material has no obvious impurity phase and has good crystallinity, high initial charge-discharge efficiency and good cycling performance.