Metal-coated plastics recycling by pulsed electric discharge

Yamashita, T.; Sakugawa, Takashi; Akiyama, H.; Hosano, Hamid

doi:10.1016/j.wasman.2019.03.069

Cited by 5 publications

(1 citation statement)

References 21 publications

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“…This technology has successfully separated metallic and non‐metallic composites in urban minerals. [ 122 ] Motivated by the conductivity of Al foil and the non‐conductivity of cathode material particles/graphite, a novel electrical method for separating cathode materials and Al foil, based on pulsed high‐voltage discharge, was developed. [ 91 ] First, the cathode material was cut into a 30 mm × 80 mm test sheet and discharged with a high‐voltage electric pulse, using water as a protective medium.…”

Section: Different Technical Systems For the Separation Of Cathode Ma...mentioning

confidence: 99%

Challenges in Recycling Spent Lithium‐Ion Batteries: Spotlight on Polyvinylidene Fluoride Removal

Wang

Liu

et al. 2023

Global Challenges

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In the recycling of retired lithium‐ion batteries (LIBs), the cathode materials containing valuable metals should be first separated from the current collector aluminum foil to decrease the difficulty and complexity in the subsequent metal extraction. However, strong the binding force of organic binder polyvinylidene fluoride (PVDF) prevents effective separation of cathode materials and Al foil, thus affecting metal recycling. This paper reviews the composition, property, function, and binding mechanism of PVDF, and elaborates on the separation technologies of cathode material and Al foil (e.g., physical separation, solid‐phase thermochemistry, solution chemistry, and solvent chemistry) as well as the corresponding reaction behavior and transformation mechanisms of PVDF. Due to the characteristic variation of the reaction systems, the dissolution, swelling, melting, and degradation processes and mechanisms of PVDF exhibit considerable differences, posing new challenges to efficient recycling of spent LIBs worldwide. It is critical to separate cathode materials and Al foil and recycle PVDF to reduce environmental risks from the recovery of retired LIBs resources. Developing fluorine‐free alternative materials and solid‐state electrolytes is a potential way to mitigate PVDF pollution in the recycling of spent LIBs in the EV era.

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Section: Different Technical Systems For the Separation Of Cathode Ma...mentioning

confidence: 99%