Identification of Electrolyte Salts in Lithium-Ion Battery Black Mass

被引：0

作者：

Hansel, Bastian ^{[1
]}

Burkmann, Konrad ^{[2
]}

Stoerr, Bianca ^{[2
]}

Paetzold, Carsten ^{[1
]}

Mertens, Florian ^{[2
,3
]}

Bertau, Martin ^{[1
,4
,5
]}

机构：

[1] TU Bergakad Freiberg, Inst Chem Technol, Leipziger Str 29, D-09599 Freiberg, Germany

[2] TU Bergakad Freiberg, Inst Phys Chem, Leipziger Str 29, D-09599 Freiberg, Germany

[3] TU Bergakad Freiberg, Ctr Efficient High Temp Proc & Mat Convers, Winkler str 5, D-09599 Freiberg, Germany

[4] Fraunhofer Technol Ctr High Performance Mat THM, Fraunhofer Inst Ceram Technol & Syst IKTS, St Niclas Schacht 13, D-09599 Freiberg, Germany

[5] Saxonian Acad Sci, Karl Tauchnitz Str 1, D-04107 Leipzig, Germany

来源：

CHEMIE INGENIEUR TECHNIK | 2025年 / 97卷 / 04期

关键词：

Hexafluorophosphate; Ion chromatography; Lithium-ion battery; Recycling; THERMAL-DECOMPOSITION; LIPF6-BASED ELECTROLYTES; HEXAFLUOROPHOSPHATE; LI; THERMODYNAMICS; INTERCALATION; HYDROLYSIS; STABILITY; WATER;

D O I：

10.1002/cite.202400121

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Based on ion chromatographic and thermal analyses, it was demonstrated that the assumption that the presence of PF6- ions in lithium-ion battery (LIB) black mass is due to LiPF6 residues is incorrect. In the industrial samples investigated, PF6--containing residues were present in the case of low temperature-pretreated LIB black mass. Based on thermal analysis, a significant proportion of the PF6- species was found to originate from NaPF6. The presence of NaPF6 is due to the use of tap water in the commercial workup process. Due to the transformation of the PF6- species and the associated changes in degradation and hydrolysis behavior, appropriate recycling routes need to be adapted regarding the handling of the conducting salt.

引用

页码：299 / 310

页数：12

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