Direct Recycling Process for Production Scraps of Li-Ion Batteries Positive Electrode Based on Pressurized Co2

Опубликована: Янв. 1, 2024

Due to the lack of adapted competitive recycling methods, Lithium-ion Batteries (LIB) production scraps are currently treated as spent batteries, despite their significant difference in characteristics. However, with drastic increase LIB and consequently, generation scraps, various innovative techniques have emerged gained attention, aiming offer greener, cheaper more direct routes. This study explores a novel solvent-based delamination method that employs mixture triethyl phosphate (TEP), acetone, carbon dioxide (CO2) under pressure temperature, for positive electrode scraps. Optimization experimental conditions led achieve full within 15 minutes at 120°C 100 bar, an exceptionally low solvent consumption 1.5 TEP ratio (w/w). The properties pressurized fluids enhanced kinetics while removing need stirring reducing (by 6.7x), showing huge advantage compared other state-of-the-art techniques. Subsequent process, active material LNi0.6Mn0.2Co0.2O2 (NMC622) was easily separated from current collector, enabling comprehensive characterization. A in-depth focus on electrochemically revealed its chemical composition, crystal structure, microstructure remained preserved throughout process. Ultimately, electrochemical performance recycled NMC622 closely resembled pristine NMC622, affirming promising potential this approach.

Язык: Английский

Direct Recycling Process Using Pressurized CO₂ for Li-Ion Battery Positive Electrode Production Scraps

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 13(1), С. 105 - 118

Опубликована: Дек. 18, 2024

This study explores a novel solvent-based delamination method that employs mixture of triethyl phosphate (TEP), acetone, and carbon dioxide (CO2) under pressure temperature for the efficient fast direct recycling positive electrode production scraps. Optimization experimental conditions led to achieve 100% within 15 min at 120 °C 100 bar, with low solvent consumption 1.5 TEP ratio (w/w). The CO2 allows decreasing viscosity acetone so increasing its diffusivity; favoring binder dissolution accelerating process versus other reported processes. original approach not only enables reduction (by 6.7×), but removes need stirring, which is often detrimental approaches scaling up while maintaining delamination. Subsequent process, active material LiNi0.6Mn0.2Co0.2O2 (NMC622) in powder form was easily fully separated from current collector, enabling comprehensive characterization. A more in-depth focus on electrochemically revealed chemical composition, crystal structure, microstructure remained preserved throughout process. Ultimately, electrochemical performance recycled NMC622 closely resembled pristine NMC622, affirming promising potential this approach.

Язык: Английский

Direct recycling process using pressurized CO2 for Li-ion batteries positive electrode production scraps

SSRN Electronic Journal, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Due to the lack of adapted competitive recycling methods, Lithium-ion Batteries (LIB) production scraps are currently treated as spent batteries, despite their significant difference in characteristics. However, with drastic increase LIB and consequently, generation scraps, various innovative techniques have emerged gained attention, aiming offer greener, cheaper more direct routes. This study explores a novel solvent-based delamination method that employs mixture triethyl phosphate (TEP), acetone carbon dioxide (CO2) under pressure temperature, for positive electrode scraps. The influence experimental parameters such TEP ratio, time, solvent quantity was investigated optimize parameters. optimized conditions achieve full within 15 minutes 120°C, composed 75% 25% (v/v), concentration 1.5% ratio (w/w) CO2 100 bar. Subsequent process, active material LiNi0.6Mn0.2Co0.2O2 (NMC622) easily separated from current collector, enabling comprehensive characterization. Meanwhile, dissolved polyvinylidene difluoride (PVDF) could be recovered by precipitation water antisolvent. A in-depth focus on electrochemically revealed its chemical composition, crystal structure, microstructure remained preserved throughout process. Ultimately, electrochemical performance recycled NMC622 closely resembled pristine NMC622, affirming promising potential this approach.

Язык: Английский