Title:
POROUS SPHERICAL TERNARY PRECURSOR AND PREPARATION METHOD THEREFOR, TERNARY POSITIVE ELECTRODE MATERIAL, POSITIVE ELECTRODE PLATE AND BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/040908
Kind Code:
A1
Abstract:
The present invention relates to the technical field of batteries, and disclosed are a porous spherical ternary precursor and a preparation method therefor, a ternary positive electrode material, a positive electrode plate and a battery. The method comprises: introducing a metal solution, ammonia water and an alkali liquor into a reaction kettle together, starting stirring, maintaining the pH at 11.5-12.5, and granulating the mixture to form primary particles; continuing granulation so as to agglomerate the primary particles to form secondary particles, gradually reducing the pH in the reaction kettle to 11-11.5 during the process that the secondary particles grow to a target particle size, synchronously and gradually reducing the stirring speed so as to gradually grow the secondary particles to form porous spheres, and after the secondary particles grow to the target particle size, rapidly increasing the pH in the reaction kettle to 11.5-12.5 and maintaining same for a preset time to obtain an intermediate precursor; and treating the intermediate precursor to obtain a porous spherical ternary precursor. The method can achieve organic unification of large specific surface area and high compaction of the precursor on the premise of ensuring the cycling performance of a battery.
Inventors:
JIANG WEI (CN)
LIU GENGHAO (CN)
LI WEIQUAN (CN)
RUAN DINGSHAN (CN)
LI HEMIN (CN)
LI CHANGDONG (CN)
LIU GENGHAO (CN)
LI WEIQUAN (CN)
RUAN DINGSHAN (CN)
LI HEMIN (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/079086
Publication Date:
February 29, 2024
Filing Date:
March 01, 2023
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
C01G53/00; H01M4/131; H01M4/36; H01M4/525; H01M10/0525
Foreign References:
| CN115403076A | 2022-11-29 | |||
| CN113651367A | 2021-11-16 | |||
| CN110867576A | 2020-03-06 | |||
| CN114394631A | 2022-04-26 | |||
| US20160296914A1 | 2016-10-13 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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