Title:
PREPARATION METHOD AND USE OF LITHIUM MANGANESE IRON PHOSPHATE
Document Type and Number:
WIPO Patent Application WO/2024/055519
Kind Code:
A1
Abstract:
Provided are a preparation method and use of lithium manganese iron phosphate. Taking an acidic ferrophosphorus solution as a base solution, the acidic ferrophosphorus solution, a phosphorus-manganese pre-mixed solution, and an alkali solution are added in a parallel flow for a reaction, wherein the phosphorus-manganese pre-mixed solution is formed by a disodium dihydrogen pyrophosphate solution and a manganese salt solution which are pre-mixed via a pipeline mixer, and then enters a reaction system; an obtained solid is washed and dehydrated to obtain a first solid material; the first solid material is mixed with a lithium source and water for a hydrothermal reaction; a carbon source is added for spray drying; calcination is performed, and then lithium manganese iron phosphate is obtained. According to the present invention, a lithium manganese iron phosphate anode material in which phosphorus:(iron + manganese) = 1:1 and iron and manganese are uniformly mixed can be prepared. The material has a relatively high specific capacity and cycle performance.
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Inventors:
YU HAIJUN (CN)
WANG TAO (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
WANG TAO (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/077687
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:
| CN115520846A | 2022-12-27 | |||
| CN113659134A | 2021-11-16 | |||
| CN114940485A | 2022-08-26 | |||
| CN112125292A | 2020-12-25 | |||
| CN105702954A | 2016-06-22 | |||
| JP2011100592A | 2011-05-19 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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