A mesoporous anisotropic n-type Bi2Te3 monolith with low thermal conductivity as an efficient thermoelectric material

Yichi Zhang; Tristan Day; Matthew L. Snedaker; Heng Wang; Stephan Krämer; Christina S. Birkel; Xiulei Ji; Deyu Liu; G. Jeffrey Snyder; Galen D. Stucky

doi:10.1002/adma.201201974

A mesoporous anisotropic n-type Bi₂Te₃ monolith with low thermal conductivity as an efficient thermoelectric material

Yichi Zhang, Tristan Day, Matthew L. Snedaker, Heng Wang, Stephan Krämer, Christina S. Birkel, Xiulei Ji, Deyu Liu, G. Jeffrey Snyder, Galen D. Stucky

Research output: Contribution to journal › Article › peer-review

77 Scopus citations

Abstract

A mesoporous Bi₂Te₃ monolith with ≈20% porosity is fabricated by hot-pressing mesoporous powders. The mesostructures are able to transport carriers and scatter phonons efficiently. The reduction (≈60%) of the thermal conductivity is sufficient to compensate for the loss of electrical conductivity perpendicular to the direction of applied pressure, leading to an enhanced zT of 0.7, highest among all reported self-doped, n-type Bi ₂Te₃ at similar temperatures.

Original language	English (US)
Pages (from-to)	5065-5070
Number of pages	6
Journal	Advanced Materials
Volume	24
Issue number	37
DOIs	https://doi.org/10.1002/adma.201201974
State	Published - Sep 25 2012
Externally published	Yes

Keywords

anisotropic materials
bismuth telluride
mesoporous materials
thermal conductivity
thermoelectric materials

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/adma.201201974

Cite this

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title = "A mesoporous anisotropic n-type Bi2Te3 monolith with low thermal conductivity as an efficient thermoelectric material",

abstract = "A mesoporous Bi2Te3 monolith with ≈20% porosity is fabricated by hot-pressing mesoporous powders. The mesostructures are able to transport carriers and scatter phonons efficiently. The reduction (≈60%) of the thermal conductivity is sufficient to compensate for the loss of electrical conductivity perpendicular to the direction of applied pressure, leading to an enhanced zT of 0.7, highest among all reported self-doped, n-type Bi 2Te3 at similar temperatures.",

keywords = "anisotropic materials, bismuth telluride, mesoporous materials, thermal conductivity, thermoelectric materials",

author = "Yichi Zhang and Tristan Day and Snedaker, {Matthew L.} and Heng Wang and Stephan Kr{\"a}mer and Birkel, {Christina S.} and Xiulei Ji and Deyu Liu and Snyder, {G. Jeffrey} and Stucky, {Galen D.}",

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T1 - A mesoporous anisotropic n-type Bi2Te3 monolith with low thermal conductivity as an efficient thermoelectric material

AU - Zhang, Yichi

AU - Day, Tristan

AU - Snedaker, Matthew L.

AU - Wang, Heng

AU - Krämer, Stephan

AU - Birkel, Christina S.

AU - Ji, Xiulei

AU - Liu, Deyu

AU - Snyder, G. Jeffrey

AU - Stucky, Galen D.

PY - 2012/9/25

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AB - A mesoporous Bi2Te3 monolith with ≈20% porosity is fabricated by hot-pressing mesoporous powders. The mesostructures are able to transport carriers and scatter phonons efficiently. The reduction (≈60%) of the thermal conductivity is sufficient to compensate for the loss of electrical conductivity perpendicular to the direction of applied pressure, leading to an enhanced zT of 0.7, highest among all reported self-doped, n-type Bi 2Te3 at similar temperatures.

KW - anisotropic materials

KW - bismuth telluride

KW - mesoporous materials

KW - thermal conductivity

KW - thermoelectric materials

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