Enhanced thermoelectric performance of Te-doped skutterudite with nano-micro-porous architecture. (15th January 2019)

• Record Type: Journal Article
• Authors: Yang, Houjiang; Wen, Pengfei; Zhou, Xilong; Li, Yao; Duan, Bo; Zhai, Pengcheng; Zhang, Qingjie
• Is Part Of: Scripta materialia. Number 159(2019)
• Page Start: 68
• Page End: 71
• Publication Date: 2019-01-15
• Subjects: Thermoelectric materials -- Porous material -- Thermal conductivity -- Thermoelectric properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.09.015
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Te-doped Co4 Sb11.5 Te0.5 materials with nano to micro sized pores are fabricated tactfully by annealing the nano-Co4 Sb11.5 Te0.5 /Co4 Sb11.5 Te0.5 composites. The annealed samples present a dramatically reduced thermal conductivity due to the abundant scattering of phonons in a wide wavelength range by the obtained all-scale porous architecture. Meanwhile, the Seebeck coefficient is enhanced for the annealed samples due to the lower carrier concentration. The sample annealed 100 h exhibits an enhanced dimensionless figure of merit of 1.2 at 800 K, increased by 33.7% as compared with that of the dense sample. Graphical abstract: Unlabelled Image