Microvast Power Systems Co., Ltd.

Microvast Advanced Materials Inc.

Microvast, Inc.

Bryan Yonemoto

Xiao Zhang

Wenjuan Liu Mattis

Huijie Guo

Karima Lasri

Xuelei Sun

Zhifeng Zhang

Tianshu Deng

Yuehui Yin

Xiangchao Kong

Jianzhao Liu

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.

Methods for preparing particle precursor and cathode active particles, and particle precursor prepared thereby

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.

Modified positive electrode material and preparation method therefor, and lithium ion battery

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.

Methods for preparing particles precursor, and particle precursor prepared thereby

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 Aat time tto Aat time t. 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.

Method of preparing lithium-ion cathode particles and cathode active material formed therefrom

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.

Methods for preparing particle precursor, and particle precursor prepared thereby

A cathode active material and a Lithium-ion electrochemical system thereof are provided. The lithium-ion cathode material is described by xLiMO*(&#x2212;x)(LiM')O, M and M&#x2032; independently comprises one or more metal ions that together have a combined average oxidation state between 3+ or 2+, 1&#x3e;x&#x2265;0.5, 0.75&#x2265;a&#x3e;0, 1&#x2265;y&#x2265;0.625.

Cathode active material and lithium-ion electrochemical system thereof

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.

Method for preparing cathode particles and cathode active materials having same

The present disclosure provides a cathode active material and a lithium ion electrochemical system including the same. A general formula of the cathode active material is as follows: z{xLiMnO*(1&#x2212;x)LiRO}*(1&#x2212;z) LiR'O, herein R and R&#x2032; independently include one or more metal ions, an oxidation valence state of the R is 3, and an oxidation valence state of the R&#x2032; is 2, herein, 0&#x2264;x&#x2264;0.25, 0&#x3c;a&#x2264;0.75, 0.625&#x2264;y&#x2264;1, 0.75&#x2264;z&#x3c;1.

Cathode active material and lithium ion electrochemical system including the same

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.

Method for recycling and refreshing cathode material, refreshed cathode material and lithium ion battery

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.

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Clearwater, FL, United States of America

Bryan Yonemoto