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Recycling Microplastics to Fabricate Anodes for Lithium‐Ion Batteries: From Removal of Environmental Troubles via Electrocoagulation to Useful Resources
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Researchers developed an electrocoagulation-based process to remove microplastics from wastewater, then converted the recovered plastic-containing iron flocs into anode materials for lithium-ion batteries, demonstrating a circular approach that converts a waste stream into useful energy storage components.
Electrocoagulation is an evolving technology for the abatement of a broad range of pollutants in wastewater owing to its flexibility, easy setup, and eco-friendly nature. Here, environment-friendly strategies for the separation, retreatment, and utilization of microplastics via electrocoagulation are investigated. The findings show that the flocs generated by forming Fe3 O4 on the surface of polyethylene (PE) particles are easily separated using a magnetic force with high efficiency of 98.4%. In the photodegradation of the obtained flocs, it is confirmed that Fe3 O4 shall be removed for the efficient generation of free radicals, leading to the highly efficient photolysis of PE. The removed Fe3 O4 can be recycled into iron-oxalate compounds, which can be used in battery applications. In addition, it is suggested that heat treatment of Fe3 O4 -PE flocs in an Ar atmosphere leads to forming Fe3 O4 core-carbon shell nanoparticles, which show excellent performance as anodes in lithium-ion batteries. The proposed composite exhibits an excellent capacity of 1123 mAh g-1 at the current density of 0.5 A g-1 after 600 cycles with a negative fading phenomenon. This study offers insight into a new paradigm of recyclable processes, from environmental issues such as microplastics to using energy materials.
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Recycling Microplastics to Fabricate Anodes for Lithium‐Ion Batteries: From Removal of Environmental Troubles via Electrocoagulation to Useful Resources (Adv. Sci. 8/2023)
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Researchers collected microplastics using electrocoagulation and then converted them into carbon-based anode materials for lithium-ion batteries. The approach removes environmental plastic pollution while creating functional battery components from the waste. This circular approach demonstrates a promising strategy for turning microplastic pollution into a useful resource.
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This review analyzed electrocoagulation as a method for removing microplastics from wastewater, finding that hybrid systems combining electrooxidation or membrane filtration achieve over 95% removal efficiency through charge neutralization, sweep flocculation, and oxidative degradation. Efficient wastewater treatment is a critical intervention point for stopping microplastics from reaching aquatic environments and ultimately entering the food chain and drinking water.
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