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Effects of Preparation Methods on the Thermoelectric Performance of SWCNT/Bi2Te3 Bulk Composites.


ABSTRACT: Single-walled carbon nanotube (SWCNT)/Bi2Te3 composite powders were fabricated via a one-step in situ reductive method, and their corresponding bulk composites were prepared by a cold-pressing combing pressureless sintering process or a hot-pressing process. The influences of the preparation methods on the thermoelectric properties of the SWCNT/Bi2Te3 bulk composites were investigated. All the bulk composites showed negative Seebeck coefficients, indicating n-type conduction. A maximum power factor of 891.6 ?Wm-1K-2 at 340 K was achieved for the SWCNT/Bi2Te3 bulk composites with 0.5 wt % SWCNTs prepared by a hot-pressing process, which was ~5 times higher than that of the bulk composites (167.7 ?Wm-1K-2 at 300 K) prepared by a cold-pressing combing pressureless sintering process, and ~23 times higher than that of the bulk composites (38.6 ?Wm-1K-2 at 300 K) prepared by a cold-pressing process, mainly due to the enhanced density of the hot-pressed bulk composites.

SUBMITTER: Liu Y 

PROVIDER: S-EPMC7321600 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Effects of Preparation Methods on the Thermoelectric Performance of SWCNT/Bi<sub>2</sub>Te<sub>3</sub> Bulk Composites.

Liu Yuqi Y   Du Yong Y   Meng Qiufeng Q   Xu Jiayue J   Shen Shirley Z SZ  

Materials (Basel, Switzerland) 20200609 11


Single-walled carbon nanotube (SWCNT)/Bi<sub>2</sub>Te<sub>3</sub> composite powders were fabricated via a one-step in situ reductive method, and their corresponding bulk composites were prepared by a cold-pressing combing pressureless sintering process or a hot-pressing process. The influences of the preparation methods on the thermoelectric properties of the SWCNT/Bi<sub>2</sub>Te<sub>3</sub> bulk composites were investigated. All the bulk composites showed negative Seebeck coefficients, indic  ...[more]

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