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Thermoplastic Network Formation as a Method for Stabilizing Salt Hydrate Particles.

Elena Averina1,2, Hartmut Fischer3, Olaf C G Adan1,3

  • 1Department of Applied Physics and Science Education, Eindhoven University of Technology, Den Dolech 2, 5600 MB Eindhoven, The Netherlands.

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Summary
This summary is machine-generated.

This study enhances thermochemical energy storage (TCES) materials by incorporating polymer networks. This prevents particle degradation, improving TCES system efficiency and longevity.

Keywords:
compositessalt hydratesstabilizationthermochemical energy storagethermoplastic polymers

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Energy Storage

Background:

  • Thermochemical energy storage (TCES) offers efficient thermal energy management.
  • Mechanical degradation of TCES materials during hydration-dehydration cycles causes particle fracturing and pressure drops.
  • This limits the practical application of TCES systems.

Purpose of the Study:

  • To investigate the use of polymeric networks to enhance the mechanical stability of TCES particles.
  • To improve the durability and performance of TCES materials for repeated cycling.

Main Methods:

  • Composite particles were developed using potassium carbonate hydrate (K2CO3·1.5H2O) as the core material.
  • Thermoplastic polymers including polyamide (PA11), polyetherimide (PEI), and polyvinylidene fluoride (PVDF) were used as stabilizing elements.
  • The mechanical properties and cycling stability of the composite particles were evaluated.

Main Results:

  • Incorporation of polymeric networks significantly improved the mechanical integrity of the TCES particles.
  • The composite particles demonstrated resistance to disintegration over multiple hydration-dehydration cycles.
  • Enhanced mechanical stability was achieved while maintaining relatively high porosity, leading to improved hydration rates.

Conclusions:

  • Polymer-stabilized TCES particles offer a viable solution to mechanical degradation issues.
  • This approach enhances the long-term performance and reliability of thermochemical energy storage systems.
  • The stabilization method is compatible with scalable manufacturing techniques like tableting and compacting.