Making High Thermoelectric and Superior Mechanical Performance Nb<sub>0.88</sub>Hf<sub>0.12</sub>FeSb Half‐Heusler via Additive Manufacturing

Thermoelectric generators held great promise through energy harvesting from waste heat. Their practical application, however, is greatly constrained by poor raw material utilization and tedious processing in fabricating desired shapes. Herein, a state-of-the-art process is reported for 3D printing the half-Heusler (Nb<sub>0.88</sub>Hf<sub>0.12</sub>FeSb) thermoelectric material using laser powder bed fusion (LPBF). The multi-dimensional intra- and inter-granular defects created by this process greatly suppress thermal conductivity by providing numerous phonon scattering centers. The resulting LPBF-fabricated half-Heusler exhibits a high figure of merit ≈1.2 at 923 K and a single-leg maximum efficiency of ≈3.3% at a temperature difference (ΔT) of 371 K. Hafnium oxide nanoparticles generated during LPBF effectively prevent crack propagation, ensuring competent mechanical performance and reliable thermoelectric output. The findings highlight the significant potential of LPBF in driving the next industrial revolution of highly efficient and customizable thermoelectric materials.

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Publication Details

Journal
Advanced Science
Published
2024-09-09
DOI
https://doi.org/10.1002/advs.202403705
Citations
11
Primary Topic
Advanced Thermoelectric Materials and Devices
Type
article
Field-Weighted Citation Impact
1.29

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article

Making High Thermoelectric and Superior Mechanical Performance Nb0.88Hf0.12FeSb Half‐Heusler via Additive Manufacturing

Yong Deng, Wenyu Hu, Qiujun Hu, Katsumi Tanigaki et al.
11 citations
Advanced Science
Advanced Thermoelectric Materials and Devices
1.29
article

Making High Thermoelectric and Superior Mechanical Performance Nb0.88Hf0.12FeSb Half‐Heusler via Additive Manufacturing

Yong Deng, Wenyu Hu, Qiujun Hu, Katsumi Tanigaki, Junbiao Guo, Xingjun Liu, Qian Zhang, Lei Yang, Kaiyi Luo, Xiaofang Li, Chen Chen, Wenhua Xue, Xin Bao, Zhifu Yao, Xiaoyi Wang, Wenbin Qiu, Jun Tang
article en
11 citations

Abstract

Thermoelectric generators held great promise through energy harvesting from waste heat. Their practical application, however, is greatly constrained by poor raw material utilization and tedious processing in fabricating desired shapes. Herein, a state-of-the-art process is reported for 3D printing the half-Heusler (Nb<sub>0.88</sub>Hf<sub>0.12</sub>FeSb) thermoelectric material using laser powder bed fusion (LPBF). The multi-dimensional intra- and inter-granular defects created by this process greatly suppress thermal conductivity by providing numerous phonon scattering centers. The resulting LPBF-fabricated half-Heusler exhibits a high figure of merit ≈1.2 at 923 K and a single-leg maximum efficiency of ≈3.3% at a temperature difference (ΔT) of 371 K. Hafnium oxide nanoparticles generated during LPBF effectively prevent crack propagation, ensuring competent mechanical performance and reliable thermoelectric output. The findings highlight the significant potential of LPBF in driving the next industrial revolution of highly efficient and customizable thermoelectric materials.

Advanced ScienceVol. 11(41)
Harbin Institute of Technology (CN), Sichuan University (CN), State Ethnic Affairs Commission (CN), Southern University of Science and Technology (CN), Beijing Academy of Quantum Information Sciences (CN), Southwest Minzu University (CN), Wuxi Institute of Technology (CN)
National Natural Science Foundation of China
Affordable and clean energy
Openalex Percentile: Top 17%
Advanced Thermoelectric Materials and Devices
1.29
DOIOpen Access PDFOpenAlex
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