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Enhanced thermoelectric performance of W18O49/ZnO composite for waste heat recovery with induced high weighted mobility
Author(s)
Tran, Nhat Quang Minh
Ngoc Le, Quy Nguyen
Pham, Anh Tuan Thanh
Tran, Vinh Cao
Thi Lai, Hoa
Thi Ta, Hanh Kieu
Seetawan, Tosawat
Vora-ud, Athorn
Nguyen Le, Thu Bao
Snyder, Gerald Jeffrey
Phan, Thang Bach
Date Issued
August 30, 2024
Type
Article
Abstract
Zinc Oxide (ZnO) exhibits a significant Seebeck coefficient, making it a promising candidate for thermoelectric energy harvesting. This study explores composite materials comprising xW18O49/(1-x)ZnO fabricated through conventional sintering at 1150°C, with x varying from 0 to 0.3. Incorporating a highly conductive secondary phase into the ZnO matrix enhances conductivity by 28 times, reaching 111.4 Scm−1 at 800°C, while maintaining 83 % of the pristine sample's Seebeck coefficient. Notably, the power factor improves to 3.8 mWK−2m−1 for the x = 0.1 sample, representing a 19 times heightening over unmodified ZnO ceramic. Additionally, these composites exhibit high weight mobility, indicating rapid electronic responses. As a result, the ZT value increases by 500 %, reaching 0.15 at 800°C for the x = 1 sample. This study presents a novel approach to fabricating high-power-factor thermoelectric materials by integrating highly conductive oxides into matrices with large Seebeck coefficients.
Citation
Journal of Alloys and Compounds, 997, 2024