Mild and efficient recovery of lithium-ion battery cathode material by deep eutectic solvents with natural and cheap components

Thermal, chemical, electrochemical, radiolytic and biological stability of ionic liquids and deep eutectic solvents

“…(5) During the application process, ILs and DESs may be more unstable at high temperature. 11,177 Near room temperature is anticipated to maintain the stability of ILs and DESs when they are applied in the fields of separation, catalysis, analysis and electrolytes. For example, ILs [Emim][Tetz] could capture SO 2 with low concentration at 40 1C, at which ILs tend to be more stable.…”

Unexpectedly Superhigh Toxicity of Superbase-Derived Deep Eutectic Solvents albeit High Efficiency for CO2 Capture and Conversion

“…Therefore, the effect of the mole ratio on the properties of DESs should be investigated. There are many previous reports investigating the effect of the mole ratio of DESs on physical properties ,, and industrial applications. ,− DESs DBU/DBN:EG with different molar ratios (i.e., 2:1, 4:1, 6:1, and 8:1) are prepared to study the effect of the molar ratio on the toxicity of superbase-derived DESs. The IC50 values of DBU, DBN, and EG were 8.49 ± 0.09 mM, 15.51 ± 3.68 mM, and 1308.34 ± 14.32 mM, respectively (Table ).…”

“…The emergence of deep eutectic solvents (DESs) has aroused great interest in the fields of gas capture/utilization, − biomass conversion, − material preparation, , energy storage, − and batteries recovery. − DESs are discovered by Abbott et al to show liquid near room temperature in 2003 exemplifying by ChCl:urea, ChCl:methyl urea, ChCl:dimethyl urea, ChCl:thiourea, ChCl:acetamide, ChCl:benzamide, and ChCl:tetramethyl urea . DESs are the liquid mixture of two or more compounds interacting through hydrogen bonds or halogen bonds. ,, The individual compounds are known as hydrogen bond donors (HBDs) or hydrogen bond acceptors (HBAs).…”

Mechanistic Study of Lithium-Ion Battery Cathode Recycling Using Deep Eutectic Solvents

“…However, an in-depth understanding of the mechanism of metal dissolution in such DES systems is of utmost importance to optimize such systems to obtain the highest possible LEs. 21 Interestingly, among the reported DES systems for LiB cathode material leaching, the LEs of those containing ChCl have been truly remarkable, [13][14][15]19 which makes us curious about the role of ChCl in the leaching mechanism of the active metals from the LiB cathodes. Taking into account these considerations, in this work, we attempt to elucidate the mechanism of metal leaching from NMC and NCA, which are commonly used LiB cathode materials, in a choline chloride:ethylene glycol (ChCl:EG) DES by varying the dissolution parameters, including the composition of the DES, temperature, and time.…”