 This research has demonstrated the potential of flexible nanocomposite films as a viable solution for providing self-supporting, power supplies for Internet of Things, IoT, devices. The films consisted of bismuth telluride, by two TE3, nanoplates and single-walled carbon nanotubes, SWCNTs. These materials were selected due to their high thermoelectric performance and flexibility respectively. Ultracellentrefugeatophagen was used to selectively obtain suitable SWCNTs from the mixture of thin and long SWCNTs. This process resulted in a film with high electrical conductivity, which was six times higher than that of a film with SWCNTs obtained without ultracellentrefugeatophagen. Additionally, the film had a power factor of 6.3W CMK2, indicating it is one of the most efficient flexible nanocomposite films available. This article was offered by Tomayuki Chiba, Hayato Yabuki, and Masayuki Takashiri.