Work

Pb-for-Bi substitution for enhancing thermoelectric characteristics of [(Bi,Pb)2Ba2O4±ω]0.5CoO2

Year: 2006

Type: article

Abstract: We report strongly enhanced thermoelectric characteristics for a misfit-layered oxide, [Bi2Ba2O4±ω]0.5CoO2, in a wide temperature range, as achieved through substituting up to 20% of Bi by Pb. The Pb substitution kept the thermal conductivity (κ) unchanged but decreased the electrical resistivity (ρ) and increased the Seebeck coefficient (S) simultaneously, such that a three-fold enhancement in the thermoelectric figure of merit, Z (≡S2∕ρκ), was realized. At the same time x-ray absorption near-edge structure data indicated that the valence and spin states of Co are not affected by the Pb-for-Bi substitution.

Source: Applied Physics Letters

DOI: 10.1063/1.2206134

Authors: K. Sakai, M. Karppinen, J. M. Chen, R. S. Liu, S. Sugihara, H. Yamauchi

Institutions: Tokyo Institute of Technology, Materials & Structures Laboratory, National Synchrotron Radiation Research Center, National Taiwan University, Shonan Institute of Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

OpenAlex ID: W1495364713

FWCI: 0.384

Cites: 27

Cited by: 20

Related to: 10