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Waste plastics upcycled for high-efficiency H2O2 production and lithium recovery via Ni-Co/carbon nanotubes composites

Author

Listed:
  • Baolong Qiu

    (Northeastern University)

  • Mengjie Liu

    (Hung Hom)

  • Xin Qu

    (Wuhan University)

  • Fengying Zhou

    (Wuhan University)

  • Hongwei Xie

    (Northeastern University)

  • Dihua Wang

    (Wuhan University)

  • Lawrence Yoon Suk Lee

    (Hung Hom)

  • Huayi Yin

    (Northeastern University
    Wuhan University
    Northeastern University)

Abstract

The disposal and management of waste lithium-ion batteries (LIBs) and low-density polyethylene (LDPE) plastics pose significant environmental challenges. Here we show a synergistic pyrolysis approach that employs spent lithium transition metal oxides and waste LDPE plastics in one sealed reactor to achieve the separation of Li and transition metal. Additionally, we demonstrate the preparation of nanoscale NiCo alloy@carbon nanotubes (CNTs) through co-pyrolysis of LiNi0.6Co0.2Mn0.2O2 and LDPE. The NiCo alloy@CNTs exhibits excellent catalytic activity (Eonset = ~0.85 V) and the selectivity (~90%) for H2O2 production through the electrochemical reduction of oxygen. This can be attributed to the NiCo nanoalloy core and the presence of CNTs with abundant oxygen-containing functional groups (e.g., –COOH and C–O–C), as confirmed by density function theory calculations. Overall, this work presents a straightforward and green approach for valorizing and upcycling various waste LIBs and LDPE plastics.

Suggested Citation

  • Baolong Qiu & Mengjie Liu & Xin Qu & Fengying Zhou & Hongwei Xie & Dihua Wang & Lawrence Yoon Suk Lee & Huayi Yin, 2024. "Waste plastics upcycled for high-efficiency H2O2 production and lithium recovery via Ni-Co/carbon nanotubes composites," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50679-1
    DOI: 10.1038/s41467-024-50679-1
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    References listed on IDEAS

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