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Phase-Transition-Promoted Thermoelectric Textiles Based on Twin Surface-Modified CNT Fibers.

Long Yu1,2, Xinyu Liu1,2, Boxuan Zhang1

  • 1Department of Light Chemical Engineering, Jiangnan University, Wuxi 214122, PR China.

ACS Applied Materials & Interfaces
|March 30, 2024
PubMed
Summary

Flexible thermoelectric textiles (TET) offer a solution to wearable device energy needs by converting body heat into electricity. Incorporating microencapsulated phase change materials (MPCM) further boosted energy generation by 25.7%.

Keywords:
CNTgold nanoparticlesmicroencapsulated phase change materialsthermoelectric textilestwin-surface modification

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Nanotechnology

Background:

  • Wearable devices require sustainable power solutions to overcome energy limitations.
  • Flexible thermoelectric generators (TEGs) offer a promising approach by converting waste heat into electricity.
  • Carbon nanotube fibers (CNTF) are suitable materials for flexible thermoelectric textiles (TET) due to their electrical and mechanical properties.

Purpose of the Study:

  • To develop high-performance thermoelectric textiles (TET) for efficient wearable energy generation.
  • To enhance the power output of TET by utilizing human body heat more effectively.
  • To investigate the impact of microencapsulated phase change materials (MPCM) on TET performance.

Main Methods:

  • Fabrication of twin surface-modified CNTFs using polyethylenimine (PEI) and gold nanoparticles (Au NPs).
  • Integration of modified CNTFs into thermoelectric textiles (TET).
  • Coating the hot end of TET with microencapsulated phase change materials (MPCM) to create phase-transition-promoted TET.

Main Results:

  • The developed TET exhibited high performance, good air stability, and efficient power generation.
  • MPCM-coated TET demonstrated a 25.7% increase in energy generation compared to untreated devices.
  • The phase-transition-promoted TET effectively utilized body heat for enhanced power output.

Conclusions:

  • Twin surface-modified CNTFs are effective for fabricating high-performance thermoelectric textiles.
  • MPCM coating significantly enhances the energy generation capability of TET by improving heat utilization.
  • Phase-transition-promoted TET presents a viable strategy for powering wearable electronic devices using body heat.