Optimization of LiCoO2 powder extraction process from cathodes of lithium-ion batteries by chemical dissolution

Semina: Ciências Exatas e Tecnológicas

Paulo Rogério Catarini da Silva¹  Alexandre Urbano¹  Lucas Evangelista Sita¹  Jair Scarminio¹  Stephany Pires da Silva¹ 

[1] UEL;

关键词: Lithium-ion batteries;    LiCoO2;    Recycling;    Process optimization;   

DOI  :  10.5433/1679-0375.2015v36n1p11

来源: DOAJ

【 摘 要 】

A chemical process has been applied to extract LiCoO2 powder from cathodes of spent lithium-ion batteries by dissolution of the binder that agglutinate the powder particle each other as well to the Al collector surface. As solvents dimethylformamide (DMF) and N-methyilpirrolidone (NMP) were employed and the variables, cathode area, solution temperature, ultrasound bath power and solution stirring were chosen to optimize the extraction process. NMP solutions presented best results for powder extraction than DMF solutions. At 100 oC and under mechanical stirring or low power ultrasound bath NMP solution optimizes the binder dissolution. Powder extractions under DMF solutions are slow and an increase in the powder extraction efficiency was observed for crushed cathodes on solutions under ultrasound bath, at medium power. Filtration processes can separate the decanted LiCoO2 powder extracted upon DMF dissolution while the powder in suspension in the NMP solutions is separated by centrifugation techniques.

【 授权许可】

Unknown