Title:
CORE-SHELL GRADIENT TERNARY PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/216453
Kind Code:
A1
Abstract:
Provided in the present application is a core-shell gradient ternary precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing a terephthalic acid solution and an alkali solution to obtain a terephthalate solution, adding a nickel source solution thereto for a reaction to obtain a Ni-MOF solution, mixing the Ni-MOF solution with ammonia water, and adjusting the pH to obtain a base solution; and (2) simultaneously adding a nickel-cobalt-manganese ternary mixed salt solution, a liquid alkali solution and an ammonia water solution into the base solution obtained in step (1) for a coprecipitation reaction, and subjecting same to an aging treatment to obtain the core-shell gradient ternary precursor. In the present application, Ni-MOF is prepared in advance, and is used as a core to undergo the coprecipitation reaction, so as to prepare the core-shell gradient precursor. During the process of preparing a positive electrode material from the core-shell gradient ternary precursor, carbon in the core reacts with oxygen, such that the oxidation state of nickel on a particle surface decreases, and the generation of cracks is reduced.
Inventors:
XU KAIHUA (CN)
YUE XIANJIN (CN)
ZHANG KUN (CN)
HUA WENCHAO (CN)
LI CONG (CN)
YANG XING (CN)
LV HAO (CN)
YUAN WENFANG (CN)
JIA DONGMING (CN)
XUE XIAOFEI (CN)
LI XUEQIAN (CN)
FAN LIANGJIAO (CN)
XIANG XING (CN)
ZHU XIAOSHUAI (CN)
SHI JIAMIN (CN)
GONG ZHENGJIE (CN)
YIN DAODAO (CN)
YUE XIANJIN (CN)
ZHANG KUN (CN)
HUA WENCHAO (CN)
LI CONG (CN)
YANG XING (CN)
LV HAO (CN)
YUAN WENFANG (CN)
JIA DONGMING (CN)
XUE XIAOFEI (CN)
LI XUEQIAN (CN)
FAN LIANGJIAO (CN)
XIANG XING (CN)
ZHU XIAOSHUAI (CN)
SHI JIAMIN (CN)
GONG ZHENGJIE (CN)
YIN DAODAO (CN)
Application Number:
PCT/CN2022/113253
Publication Date:
November 16, 2023
Filing Date:
August 18, 2022
Export Citation:
Assignee:
JINGMEN GEM CO LTD (CN)
International Classes:
C08G83/00; C01G53/00; H01M4/13; H01M10/0525
Domestic Patent References:
| WO2019104473A1 | 2019-06-06 |
Foreign References:
| CN114773617A | 2022-07-22 | |||
| CN111525113A | 2020-08-11 | |||
| CN112993229A | 2021-06-18 | |||
| CN107968202A | 2018-04-27 | |||
| CN109962233A | 2019-07-02 | |||
| CN111129463A | 2020-05-08 | |||
| CN112701271A | 2021-04-23 | |||
| CN111422926A | 2020-07-17 |
Other References:
韩玉振 (HAN, YUZHEN): "金属有机骨架材料用于锂离子电池电极材料的探索应用研究 (Non-official traslation; Exploration and Application of Metal-organic Framework Materials for Lithium-ion Battery Electrode Materials)", 中国博士学位论文全文数据库 (工程科技Ⅰ辑) (CHINA DOCTORAL DISSERTATIONS FULL-TEXT DATABASE (ENGINEERING SCIENCE AND TECHNOLOGY I)), 30 June 2021 (2021-06-30)
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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