Abstract

Green recycling of spent lithium-ion batteries (LIBs) is a fundamental step toward environmental preservation and increased recovery of raw materials. In this study, lactic acid was used to leach the cathode active material of LIBs. The recycled material (Co3O4) was obtained by selective precipitation of the leachate with KOH, followed by calcination for 4.5 h at 450 °C. The composition and microstructure of the recycled material were confirmed by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy. Co3O4 was applied as a non-enzymatic electrochemical sensor for determination of ascorbic acid and as a photocatalyst in the degradation of methylene blue. The electrochemical sensor consisted of a printed electrode of carbon nanotubes modified with an 85:10:5 (w/w/w) mixture of recycled material, carbon black, and polyvinylidene fluoride (PVDF), respectively. Linear sweep voltammetry was used to measure the oxidation of ascorbic acid at 0.10 V. The analytical curve of the sensor had a coefficient of determination of 0.9915, sensitivity of 0.0498 ± 0.0023 μA mol L−1, and detection limit of 0.0245 mol L−1 in the concentration range of 0.166 to 1.0 mmol L−1. Co3O4 applied as a photocatalyst reached an efficiency of 61.47% in the decolorization of methylene blue after 120 min of reaction in the presence of H2O2 and UV light. Co3O4 recycled from spent LIBs is a promising source of raw materials for the development of non-enzymatic electrochemical sensors and photocatalysts via a sustainable and environmentally friendly route.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.