Development of a discharge-free pre-treatment device for spent lithium-ion batteries under an inert atmosphere

Sung-Hoon Jung (), Jong-Min Jung () and Jei-Pil Wang ()

International Journal of Innovative Research and Scientific Studies, 2025, vol. 8, issue 9, 300-312

Abstract: This study designs, fabricates, and experimentally validates an inert-atmosphere, discharge-free pre-treatment device for spent lithium-ion batteries (LIBs). The system integrates a vacuum pass-box with a processing enclosure (shredder and drying furnace) and enables continuous comminution and thermal drying while maintaining an internal oxygen concentration of ≤ 3% under argon. Trials on cylindrical 18650 cells involved vacuum loading, shredding, and a 300 °C, 2 h thermal step. Mass balance indicated an electrolyte-removal fraction of 5.3%, and the recovered black powder exhibited preserved NCM-type cathode signatures together with Cu/Al from current collectors, as confirmed by XRD, XRF, and SEM-EDS. Potentially harmful HF/HCl off-gases were neutralized in a NaOH scrubber prior to discharge. Compared with conventional brine-discharge → shredding → drying workflows, the proposed device mitigates wastewater and odor, suppresses ignition risk through atmosphere control, and is amenable to continuous, automation-ready operation, providing a practical alternative for industrial LIB recycling lines.

Keywords: Electrolyte removal; Inert atmosphere; Lithium-ion battery; Pre-treatment; Shredding; Spent LIB recycling. (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:aac:ijirss:v:8:y:2025:i:9:p:300-312:id:10684

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