Boron Doping of SWCNTs as a Way to Enhance the Thermoelectric Properties of Melt-Mixed Polypropylene/SWCNT Composites

作者: Beate Krause , Viktor Bezugly , Vyacheslav Khavrus , Liu Ye , Gianaurelio Cuniberti

DOI: 10.3390/EN13020394

关键词: Percolation thresholdNanocompositeElectrical resistivity and conductivityComposite materialThermoelectric effectCarbon nanotubeMaterials scienceCrystallinityCrystallizationSeebeck coefficient

摘要: Composites based on the matrix polymer polypropylene (PP) filled with single-walled carbon nanotubes (SWCNTs) and boron-doped SWCNTs (B-SWCNTs) were prepared by melt-mixing to analyze influence of boron doping thermoelectric properties these nanocomposites. It was found that besides a significantly higher Seebeck coefficient B-SWCNT films powder packages, values for incorporated in PP than those SWCNTs. Due electrical conductivity coefficients B-SWCNTs, power factor (PF) figure merit (ZT) also PP/B-SWCNT composites. The highest value achieved this study 59.7 µV/K 0.5 wt% compared 47.9 at same filling level. PF 0.78 µW/(m·K2) 7.5 B-SWCNT. SWCNT macro- microdispersions be similar both composite types, as very low percolation threshold between 0.075 0.1 SWCNT. At loadings 2.0 wt%, B-SWCNT-based composites have one order magnitude crystallization behavior is more strongly influenced B-SWCNTs since their temperatures comparable degree crystallinity. Boron therefore suitable way improve

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