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A hydrogen bond-driven strategy with ultrasound assistance for ultrafast and efficient recovery of PVDF nanoplastic from polymer solid electrolytes of all-solid lithium-ion batteries
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This study tackles the environmental problem of spent lithium-ion batteries leaking PVDF (a fluorinated plastic) into the environment by developing an eco-friendly, ultrasound-assisted process that recovers 98% of the material in a short time using green solvents. The approach significantly outperforms traditional recycling methods, offering a practical route to prevent nanoplastic contamination from discarded battery components.
Polyvinylidene fluoride (PVDF) based polymer solid electrolytes are crucial plastic components in all-solid-state lithium-ion batteries (ASLIBs). However, the large-scale application of PVDF-based solid electrolytes without proper treatment will cause persistent environmental contamination and resource waste, thus highlighting an urgent need for effective recovery strategies. Herein, we firstly propose a hydrogen bond-driven strategy with ultrasonic assistance for ultrafast and eco-friendly recovery of PVDF nanoplastic from polymer solid electrolytes of ASLIBs. Utilizing the proposed hydrogen bond-driven strategy, a maximum F leaching efficiency of 98.2% from PVDF nanoplastic can be attained within a short timeframe and under mild conditions using eco-friendly solvents. Compared with traditional methods, ultrasonic treatment exhibits a significantly improved leaching efficiency of approximately 88%. This ultrafast recovery and notable enhancement can be attributed to the breakdown of C-F bonds in PVDF, which is realized by regulating hydrogen bond networks in green solvents combined with ultrasonic treatment. This study presents a novel strategy for the green, rapid and significantly enhanced recovery of PVDF nanoplastic from spent polymer solid electrolytes of ASLIBs.
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