@article{a8df83df75954010bc2dac7123b65753,
title = "Significant Enhancement of Thermoelectric Figure of Merit in BiSbTe-Based Composites by Incorporating Carbon Microfiber",
abstract = "Bismuth telluride-based materials are already being commercially developed for thermoelectric (TE) cooling devices and power generators. However, the relatively low efficiency, which is characterized by a TE figure of merit, zT, is the main obstacle to more widespread application. Significant advances in the TE performance have been made through boundary engineering via embedding nanoinclusions or nanoscale grains. Herein, an effective approach to greatly enhance the TE performance of p-type BiSbTe material by incorporating carbon microfibers is reported. A high zT of 1.4 at 375 K and high average zT of 1.25 for temperatures in the range of 300 to 500 K is achieved in the BiSbTe/carbon microfiber (BST/CF) composite materials. Their superior TE performance originates from the low thermal conductivity and the relatively high power factor. A TE unicouple device based on the p-type BST/CF composite material and the commercially available n-type bismuth telluride-based material shows a huge cooling temperature drop in the operating temperature range of 299–375 K, and is greatly superior to the unicouple device made of both commercial p-type and n-type bismuth telluride-based material. The materials demonstrate a high average zT and excellent mechanical properties and are strong candidates for practical applications.",
keywords = "Bi Sb Te, carbon microfibers, cooling performance, high zT, thermoelectric materials",
author = "Guangsai Yang and Lina Sang and Yun, {Frank Fei} and Mitchell, {David R.G.} and Gilberto Casillas and Ning Ye and Khay See and Jun Pei and Xungai Wang and Li, {Jing Feng} and Snyder, {G. Jeffrey} and Xiaolin Wang",
note = "Funding Information: This work was partially supported by the Australian Research Council (ARC) through an ARC Professorial Future Fellowship project (FT130100778, X.L.W.), ARC Centre of Excellence in Future Low‐Energy Electronics Technologies (FLEET, CE170100039), Basic Science Centre project of NSFC (No. 51788104), and a Linkage Infrastructure Equipment and Facilities (LIEF) Grant (LE120100069, X.L.W.). This research used the JEOL JEM‐ARM200F funded by the Australian Research Council (ARC)–Linkage, Infrastructure, Equipment and Facilities (LIEF) grant (LE120100104) located at the UOW Electron Microscopy Centre. Funding Information: This work was partially supported by the Australian Research Council (ARC) through an ARC Professorial Future Fellowship project (FT130100778, X.L.W.), ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET, CE170100039), Basic Science Centre project of NSFC (No. 51788104), and a Linkage Infrastructure Equipment and Facilities (LIEF) Grant (LE120100069, X.L.W.). This research used the JEOL JEM-ARM200F funded by the Australian Research Council (ARC)?Linkage, Infrastructure, Equipment and Facilities (LIEF) grant (LE120100104) located at the UOW Electron Microscopy Centre. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
month = apr,
day = "8",
doi = "10.1002/adfm.202008851",
language = "English (US)",
volume = "31",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "15",
}