Decomposition of Solvents in Lithium-Ion Battery Recycling
Download
Read an extract
Themes
Lithium-ion battery recycling, solvent decomposition, DMC, DEC, EC, chemical decomposition, electrolytic decomposition, thermal decomposition, HPLC, Mass Spectrometry, FTIR, battery electrolytes
Reader
Abstract
Extract
of 2
Abstract
This document outlines the decomposition mechanisms of solvents such as DMC, DEC, and EC during lithium-ion battery recycling, including chemical, electrolytic, and thermal decomposition, and discusses analysis methods.
Extract
[...] Thermal Decomposition The solvents such as the carbonate of dimethyl the carbonate of ethylene and the carbonate of diethyl (DEC) break down at high temperature. This breakdown is characterized by the following reactions : - DMC : Decomposes generally above 150°C, producing carbon oxides and CO). At higher temperatures, other products such as hydrocarbons can also form. - EC : Decomposes above 200°C, primarily generating carbon oxides and compounds such as acetic acid or polycarbonate. - DEC : Decomposes at slightly lower temperatures than EC, around 180-220°C, producing carbon oxides and secondary products such as ethylene glycol. [...]
[...] Chemical Decomposition Solvants can also react chemically with other battery components: - DMC : Can react with impurities or metals in the battery, producing various degradation products such as metal carbonates or organic complexes. - EC and DEC : In the presence of certain additives or impurities, these solvents can transform into acids or other chemical products. Methods of analysis of degradation products Liquid Chromatography High Performance (HPLC) Mass Spectrometry Fourier Transform Infrared Spectroscopy (FTIR)) Schultz, C., Vedder, S., Winter, M., & Nowak, S. (2016). Qualitative investigation of the decomposition of organic solvent based lithium ion battery electrolytes with LC-IT-TOF-MS. Analytical chemistry, 88(22), 11160-11168. [...]
