Title:
METHOD FOR RECYCLING LITHIUM-ION BATTERY ELECTROLYTE
Document Type and Number:
WIPO Patent Application WO/2024/040906
Kind Code:
A1
Abstract:
Disclosed is a method for recycling a lithium-ion battery electrolyte. By means of freezing a used lithium-ion battery and then dissembling same, environmental pollution caused by volatilization and decomposition of the electrolyte can be avoided. The disassembled battery core is placed in carbon tetrachloride so that the electrolyte is completely dissolved in carbon tetrachloride; then, acetonitrile is added to cause the electrolyte solute lithium hexafluorophosphate to form a complex with the acetonitrile, forming stable Li(CH3CN)4PF6, protecting the lithium hexafluorophosphate during negative pressure evaporation and concentration, so as to avoid decomposition thereof. The concentrated liquid is cooled and crystallized, and the precipitated solid is decomplexed by means of a drying treatment, to obtain lithium hexafluorophosphate.
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/CN2023/079084
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:
C01B25/455; C01D15/00; C07C17/395; C07C19/041; C07D317/38; H01M10/0525; H01M10/54
Foreign References:
| CN115353088A | 2022-11-18 | |||
| CN105355999A | 2016-02-24 | |||
| CN110289457A | 2019-09-27 | |||
| CN109292746A | 2019-02-01 | |||
| DE102020129186A1 | 2022-03-03 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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