Title:
PREPARATION METHOD FOR AND USE OF LITHIUM IRON PHOSPHATE
Document Type and Number:
WIPO Patent Application WO/2023/226556
Kind Code:
A1
Abstract:
Disclosed are a preparation method for and a use of lithium iron phosphate. The preparation method comprises: adding a mixed solution of ferrous salt and ammonium dihydrogen phosphate, a citric acid solution and a pH regulator in concurrent flow into a first reactor for reaction, extracting the material in the first reactor into a second reactor, and adding a copper salt solution and a sodium hydroxide solution into the second reactor for reaction, wherein the material in the second reactor flows back into the first reactor; and mixing the solid material obtained by the reaction with a lithium source, and putting the mixture in an ammonia gas flow for calcining to obtain lithium iron phosphate. According to the method, a lithium iron phosphate precursor of a spherical structure can be prepared, so that the electrochemical performance of the subsequently prepared lithium iron phosphate material is improved, and the lithium iron phosphate material has relatively high electrical conductivity.
Inventors:
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/082553
Publication Date:
November 30, 2023
Filing Date:
March 20, 2023
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
C01B25/45; H01M4/58
Foreign References:
| CN114933292A | 2022-08-23 | |||
| CN101339988A | 2009-01-07 | |||
| CN101628714A | 2010-01-20 | |||
| CN1632970A | 2005-06-29 | |||
| CN1564347A | 2005-01-12 | |||
| EP2810918A1 | 2014-12-10 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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