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Authors
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Krause, B. ; Pötschke, P.
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Title
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Polyethylene glycol as additive to achieve n-conductive melt-mixed polymer/carbon nanotube composites for thermoelectric application
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Date
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01.11.2022
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Number
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60942
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Abstract
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The development of thermoelectric (TE) materials based on thermoplastic polymers and carbon nanotubes is a focus of current TE research activities. For a TE module, both p- and n-conductive composites are required, whereby the production of n-conductive materials is a particular challenge. The present study investigates whether adding polyethylene glycol (PEG) as n-dopant during the melt-mixing of the conductive composites based on polycarbonate, poly(ether ether ketone), or poly(butylene terephthalate) with singlewalled carbon nanotubes (0.5 to 2 wt%) is a possible solution. It was shown that for all three polymer types, a change in the sign of the Seebeck coefficient from positive to negative could be achieved when at least 1.5 wt% PEG was added. The most negative Seebeck coefficients were determined to be -30.1 µV/K (PC), -44.1 µV/K (PEEK), and -14.5 µV/K (PBT). The maximal power factors ranged between 0.0078 µW/m·K2 (PC), 0.035 µW/m·K2 (PEEK), and 0.0051 µW/m·K2 (PBT).
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Publisher
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Nanomaterials
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Wikidata
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Citation
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Nanomaterials 12 (2022) 3812
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DOI
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https://doi.org/10.3390/NANO12213812
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Tags
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