Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1606644 | Journal of Alloys and Compounds | 2016 | 5 Pages |
Abstract
BiCuSeO oxyselenide is a promising oxide-based thermoelectric material in the moderate temperature range, but the low electrical conductivity inhibits its further application in the field of thermoelectric materials. In this paper, we report on the effects that composite structures have an enhancement to the electrical conductivity of BiCuSeO. Here, a series of two-phase nanocomposites comprising of BiCuSeO and Cu2Se have been synthesized by SPS. Images obtained via electron microscope reveal that the two constituents form the unique composites while retaining their individual morphological identities. Owing to the composite structure with a highly conductive nanoscale of copper selenides and submicrometer scale BiCuSeO, an enhancement to the thermoelectric performance is achieved. The ZT at 823Â K is increased from 0.33 for pristine BiCuSeO to 0.44 by inserting 20Â vol% Cu2Se. Our results state that the composite structure is an effective method to enhance the performance of BiCuSeO.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yaochun Liu, Yiming Zhou, Jinle Lan, Chengcheng Zeng, Yuanhua Zheng, Bin Zhan, Boping Zhang, Yuanhua Lin, Ce-Wen Nan,