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ZT > 0.1 Electron-Carrying Polymer Thermoelectric Composites with In Situ SnCl2 Microstructure Growth.

Robert M Ireland1, Yu Liu1, Xin Guo1

  • 1Department of Materials Science and Engineering and Department of Chemistry Johns Hopkins University 3400 North Charles Street Baltimore MD 21218-2068 USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 17, 2016
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Summary

This study introduces a novel n-type polymer composite using pyromellitic diimide and in situ grown tin(II) chloride (SnCl2). This material achieves record-breaking power factors and a gigantic Seebeck coefficient for n-type polymer thermoelectrics.

Keywords:
Seebeck coefficientconducting polymerthermal conductivitythermoelectrictin chloride

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Thermoelectrics

Background:

  • Developing efficient n-type thermoelectric polymers is crucial for waste heat recovery.
  • Existing n-type polymer composites often suffer from limited power factors and Seebeck coefficients.

Purpose of the Study:

  • To synthesize and characterize a novel n-type pyromellitic diimide polymer composite.
  • To investigate the thermoelectric properties of the composite with in situ grown tin(II) chloride (SnCl2).

Main Methods:

  • In situ growth of tin(II) chloride (SnCl2) within a pyromellitic diimide polymer matrix.
  • Measurement of power factor and Seebeck coefficient to evaluate thermoelectric performance.

Main Results:

  • The composite achieved a record power factor of 50-100 μW m⁻¹ K⁻², the highest reported for purely n-type polymer composites.
  • A gigantic Seebeck coefficient ranging from -4000 to -5000 μV K⁻¹ was observed, significantly exceeding other polymer composites.

Conclusions:

  • The developed n-type polymer composite demonstrates exceptional thermoelectric performance.
  • This material represents a significant advancement in the field of organic thermoelectric generators.