Title:
METHOD FOR SAFE PYROLYSIS AND IMPURITY REMOVAL OF WASTE LITHIUM BATTERY AND APPLICATION
Document Type and Number:
WIPO Patent Application WO/2023/273262
Kind Code:
A1
Abstract:
Disclosed are a method for safe pyrolysis and impurity removal of a waste lithium battery and an application. The method comprises the following steps: performing primary roasting and quenching on electrode fragments of the waste lithium battery, and then screening to obtain fragments of a current collector and an electrode material; mixing and grinding the electrode material and a grinding aid, adding the mixture into alkali liquor for soaking, filtering and taking filter residues to obtain electrode powder; and performing secondary roasting on the electrode powder to obtain a positive electrode material. According to the method of the present invention, the bonding performance of a binder is reduced by performing primary roasting on the electrode fragments of the waste lithium battery, and meanwhile, the surface temperature of the electrode fragments of the waste lithium battery is rapidly decreased; because notches of the fragments of the current collector (aluminum foil and copper foil) are thinner, the temperature at the notch parts is decreased more quickly, contractility is first generated, and the notches of the fragments of the current collector are curled quickly; and therefore, openings of the fragments of the current collector and the electrode material of the waste lithium battery are larger, and the electrode material of the waste lithium battery is easier to fall off after screening.
Inventors:
YU HAIJUN (CN)
ZHONG YINGSHENG (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
ZHONG YINGSHENG (CN)
XIE YINGHAO (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2021/142958
Publication Date:
January 05, 2023
Filing Date:
December 30, 2021
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
C22B7/00; H01M10/54
Foreign References:
| CN113540603A | 2021-10-22 | |||
| KR20210145456A | 2021-12-02 | |||
| KR20210145454A | 2021-12-02 | |||
| CN110165324A | 2019-08-23 | |||
| CN110265742A | 2019-09-20 | |||
| CN109904546A | 2019-06-18 | |||
| CN213103142U | 2021-05-04 |
Other References:
JAERYEONG LEE, QIWU ZHANG, FUMIO SAITO: "Room Temperature Extraction of Co and Li from Ground Lithium-ion Secondary Battery Scrap", SIGEN-TO-SOZAI, vol. 116, no. 11, 1 January 2000 (2000-01-01), pages 919 - 922, XP093019458, ISSN: 0916-1740, DOI: 10.2473/shigentosozai.116.919
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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