Title:
METHOD FOR PREPARING LITHIUM MANGANESE IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL BY MEANS OF SPRAY COMBUSTION AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/055516
Kind Code:
A1
Abstract:
Disclosed in the present invention are a method for preparing a lithium manganese iron phosphate positive electrode material by means of spray combustion and the use thereof. The method comprises: mixing and dissolving a manganese source, an iron source and a phosphorus source in an organic solvent to obtain an organic solution containing phosphorus, iron and manganese; then adding a surfactant and a combustion improver; subjecting the resulting mixed solution to spray combustion; mixing the resulting solid material with a lithium source and water, subjecting same to a hydrothermal reaction, further adding a carbon source thereto, and performing spray drying; and calcining same to obtain lithium manganese iron phosphate. In the present invention, the generation of a manganese iron phosphate precipitate is avoided by mixing and dissolving a phosphorus source, a manganese source and an iron source in an organic solvent, and corresponding iron phosphate and manganese pyrophosphate are obtained by means of a spray combustion reaction, such that iron and manganese are more evenly mixed, and the specific capacity and the cycle performance of the material are improved.
Inventors:
WANG TAO (CN)
YU HAIJUN (CN)
LI AIXIA (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
YU HAIJUN (CN)
LI AIXIA (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/077682
Publication Date:
March 21, 2024
Filing Date:
February 22, 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:
C01B25/45; H01M4/58; H01M10/0525
Foreign References:
| CN115477295A | 2022-12-16 | |||
| CN103000893A | 2013-03-27 | |||
| CN113582151A | 2021-11-02 | |||
| CN105932269A | 2016-09-07 | |||
| US20170040596A1 | 2017-02-09 |
Other References:
KIM MYEONG-SEONG, KIM HYUN-KYUNG, LEE SUK-WOO, KIM DONG-HYUN, RUAN DIANBO, CHUNG KYUNG YOON, LEE SANG HYUN, ROH KWANG CHUL, KIM KW: "Synthesis of Reduced Graphene Oxide-Modified LiMn0.75Fe0.25PO4 Microspheres by Salt-Assisted Spray Drying for High-Performance Lithium-Ion Batteries", SCIENTIFIC REPORTS, NATURE PUBLISHING GROUP, US, vol. 6, no. 1, 25 May 2016 (2016-05-25), US , pages 26686, XP093146226, ISSN: 2045-2322, DOI: 10.1038/srep26686
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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