Enhancing thermoelectric properties of single-walled carbon nanotubes using halide compounds at room temperature and above
Milowska, Karolina Z.
Payne, Mike C.
Nature Publishing Group UK
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Kumanek, B., Stando, G., Stando, P., Matuszek, K., Milowska, K. Z., Krzywiecki, M., Gryglas-Borysiewicz, M., et al. (2021). Enhancing thermoelectric properties of single-walled carbon nanotubes using halide compounds at room temperature and above. Scientific Reports, 11 (1)https://doi.org/10.1038/s41598-021-88079-w
Abstract: Carbon nanotubes (CNTs) are materials with exceptional electrical, thermal, mechanical, and optical properties. Ever since it was demonstrated that they also possess interesting thermoelectric properties, they have been considered a promising solution for thermal energy harvesting. In this study, we present a simple method to enhance their performance. For this purpose, thin films obtained from high-quality single-walled CNTs (SWCNTs) were doped with a spectrum of inorganic and organic halide compounds. We studied how incorporating various halide species affects the electrical conductivity, the Seebeck coefficient, and the Power Factor. Since thermoelectric devices operate under non-ambient conditions, we also evaluated these materials' performance at elevated temperatures. Our research shows that appropriate dopant selection can result in almost fivefold improvement to the Power Factor compared to the pristine material. We also demonstrate that the chemical potential of the starting CNT network determines its properties, which is important for deciphering the true impact of chemical and physical functionalization of such ensembles.
Article, /639/301, /639/925, article
Narodowe Centrum Badań i Rozwoju (LIDER/0001/L-8/16/NCBR/2017)
National Agency for Academic Exchange of Poland (PPI/APM/2018/1/00004)
Ministerstwo Nauki i Szkolnictwa Wyższego (0036/DIA/201948)
Engineering and Physical Sciences Research Council (EP/P034616/1)
Australian Research Council (FL120100019)
External DOI: https://doi.org/10.1038/s41598-021-88079-w
This record's URL: https://www.repository.cam.ac.uk/handle/1810/321382