Low interfacial resistivity in CoSi2/ZrCoSb thermoelectric junctions. (April 2022)
- Record Type:
- Journal Article
- Title:
- Low interfacial resistivity in CoSi2/ZrCoSb thermoelectric junctions. (April 2022)
- Main Title:
- Low interfacial resistivity in CoSi2/ZrCoSb thermoelectric junctions
- Authors:
- Xiong, Bowen
Fu, Chenguang
Han, Shen
Li, Airan
Zhao, Xinbing
Zhu, Tiejun - Abstract:
- Abstract: Both p-type and n-type M CoSb ( M = Ti, Zr, Hf) half-Heusler compounds have been found to exhibit high thermoelectric performance for power generation, but there is still a lack of research on the suitable interfacial materials to connect both p-type and n-type M CoSb for device assembly. Here, CoSi2 was selected as the electrode to connect p-type Hf0.5 Zr0.5 CoSb0.8 Sn0.2 and n-type (Hf0.6 Zr0.4 )0.88 Nb0.12 CoSb, and the interfacial microstructure and interfacial contact resistivity were studied before and after thermal aging. In both types of thermoelectric junctions, the interface layer with a thickness from several to tens of μm is formed, which ensures a good bonding strength. The interfacial contact resistivity of both as-sintered thermoelectric junctions was less than 1 μΩ cm 2, which rises to 3–4 μΩ cm 2 after aging for 8 days at 1, 073 K and keeps almost unchanged during the longer aging treatment. The present work demonstrates that CoSi2 is a suitable electrode material for both p- and n-type M CoSb due to the good bonding strength and the low interfacial resistivity, which paves the way for the applications of M CoSb-based TE materials. Graphical abstract: Image 1 Highlights: CoSi2 was selected as the electrode to connect both p-type and n-type M CoSb-based TE compounds. Both types of TE junctions exhibit the low interfacial resistivity after long-term thermal-aging. CoSi2 can be used as potential electrode material for the applications of M CoSb-basedAbstract: Both p-type and n-type M CoSb ( M = Ti, Zr, Hf) half-Heusler compounds have been found to exhibit high thermoelectric performance for power generation, but there is still a lack of research on the suitable interfacial materials to connect both p-type and n-type M CoSb for device assembly. Here, CoSi2 was selected as the electrode to connect p-type Hf0.5 Zr0.5 CoSb0.8 Sn0.2 and n-type (Hf0.6 Zr0.4 )0.88 Nb0.12 CoSb, and the interfacial microstructure and interfacial contact resistivity were studied before and after thermal aging. In both types of thermoelectric junctions, the interface layer with a thickness from several to tens of μm is formed, which ensures a good bonding strength. The interfacial contact resistivity of both as-sintered thermoelectric junctions was less than 1 μΩ cm 2, which rises to 3–4 μΩ cm 2 after aging for 8 days at 1, 073 K and keeps almost unchanged during the longer aging treatment. The present work demonstrates that CoSi2 is a suitable electrode material for both p- and n-type M CoSb due to the good bonding strength and the low interfacial resistivity, which paves the way for the applications of M CoSb-based TE materials. Graphical abstract: Image 1 Highlights: CoSi2 was selected as the electrode to connect both p-type and n-type M CoSb-based TE compounds. Both types of TE junctions exhibit the low interfacial resistivity after long-term thermal-aging. CoSi2 can be used as potential electrode material for the applications of M CoSb-based TE materials. … (more)
- Is Part Of:
- Materials today energy. Volume 25(2022)
- Journal:
- Materials today energy
- Issue:
- Volume 25(2022)
- Issue Display:
- Volume 25, Issue 2022 (2022)
- Year:
- 2022
- Volume:
- 25
- Issue:
- 2022
- Issue Sort Value:
- 2022-0025-2022-0000
- Page Start:
- Page End:
- Publication Date:
- 2022-04
- Subjects:
- Thermoelectric devices -- Half-Heusler compounds -- Electrode -- Contact resistivity -- Interfacial microstructure
Energy development -- Periodicals
Energy industries -- Periodicals
Power resources -- Periodicals
Energy policy -- Periodicals
Energy development
Energy industries
Energy policy
Power resources
Electronic journals
Periodicals
621.042 - Journal URLs:
- http://www.sciencedirect.com/science/journal/24686069 ↗
http://www.sciencedirect.com/ ↗ - DOI:
- 10.1016/j.mtener.2022.100960 ↗
- Languages:
- English
- ISSNs:
- 2468-6069
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
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- British Library DSC - BLDSS-3PM
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