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Area of Science:

  • Materials Science
  • Environmental Science
  • Chemical Engineering

Background:

  • Solid waste pollution from spent lithium-ion batteries (LIBs) and plastic waste poses significant environmental challenges.
  • Resource scarcity necessitates innovative recycling and upcycling strategies for valuable materials.

Purpose of the Study:

  • To develop a dual-waste co-recycling strategy for spent lithium manganese oxide (LMO) cathodes and polyester waste.
  • To create efficient catalysts from upcycled LIBs for plastic depolymerization.

Main Methods:

  • Utilizing spent LMO cathodes from LIBs as catalysts for polyester glycolysis.
  • Investigating the structural and chemical changes in LMO during the upcycling process.
  • Performing techno-economic analysis and lifecycle assessment to evaluate sustainability and economic viability.

Main Results:

  • Degraded LMO catalysts demonstrated a 17.5-fold increase in activity for polyester glycolysis compared to pristine LMO.
  • The co-recycling strategy effectively depolymerizes diverse polyester wastes.
  • Lifecycle assessment showed a 98.2% reduction in greenhouse gas emissions and a 98.5% decrease in fossil resource consumption.

Conclusions:

  • The upcycling of spent LIBs into catalysts for plastic recycling is a viable and sustainable solution.
  • This dual-waste strategy offers a scalable blueprint for advancing circular economy principles.
  • The process contributes to mitigating solid waste pollution and conserving resources.