Abstract
We demonstrate filled CoSb3 skutterudite materials with excellent thermoelectric (TE) performance that results in one of the highest reported single stage module efficiency. The improvement in TE material performance was obtained by creating isotype n/n “bulk heterojunction” structure through assembly of novel skutterudite nanocrystals with different Yb-doping content. Combination of significant increase in carrier transport through heterojunction structure and reduction in long-range acoustic phonon transmission by two-phase mixture resulted in enhanced power factor and reduced lattice thermal conductivity. As a result, the figure-of-merit (zT) of heterojunction TE material is improved by more than 35% compared with pristine single homogeneous material. Using these improved TE materials, a high module conversion efficiency of ~9.15% was obtained when operating between 650 °C and 50 °C. This is one of the highest conversion efficiency among the practically measured single stage modules.
| Original language | English |
|---|---|
| Article number | 104193 |
| Journal | Nano Energy |
| DOIs | |
| Publication status | Accepted/In press - Jan 1 2019 |
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Keywords
- Bulk heterojunction
- Conversion efficiency
- Nano grain engineering
- Skutterudite
- Thermoelectric
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering
Cite this
High performance thermoelectric module through isotype bulk heterojunction engineering of skutterudite materials. / Nie, Ge; Li, Wenjie; Guo, Junqing; Yamamoto, Atsushi; Kimura, Kaoru; Zhang, Xiaomi; Isaacs, Eric B.; Dravid, Vinayak; Wolverton, Chris; Kanatzidis, Mercouri G.; Priya, Shashank.
In: Nano Energy, 01.01.2019.Research output: Contribution to journal › Article
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TY - JOUR
T1 - High performance thermoelectric module through isotype bulk heterojunction engineering of skutterudite materials
AU - Nie, Ge
AU - Li, Wenjie
AU - Guo, Junqing
AU - Yamamoto, Atsushi
AU - Kimura, Kaoru
AU - Zhang, Xiaomi
AU - Isaacs, Eric B.
AU - Dravid, Vinayak
AU - Wolverton, Chris
AU - Kanatzidis, Mercouri G.
AU - Priya, Shashank
PY - 2019/1/1
Y1 - 2019/1/1
N2 - We demonstrate filled CoSb3 skutterudite materials with excellent thermoelectric (TE) performance that results in one of the highest reported single stage module efficiency. The improvement in TE material performance was obtained by creating isotype n/n “bulk heterojunction” structure through assembly of novel skutterudite nanocrystals with different Yb-doping content. Combination of significant increase in carrier transport through heterojunction structure and reduction in long-range acoustic phonon transmission by two-phase mixture resulted in enhanced power factor and reduced lattice thermal conductivity. As a result, the figure-of-merit (zT) of heterojunction TE material is improved by more than 35% compared with pristine single homogeneous material. Using these improved TE materials, a high module conversion efficiency of ~9.15% was obtained when operating between 650 °C and 50 °C. This is one of the highest conversion efficiency among the practically measured single stage modules.
AB - We demonstrate filled CoSb3 skutterudite materials with excellent thermoelectric (TE) performance that results in one of the highest reported single stage module efficiency. The improvement in TE material performance was obtained by creating isotype n/n “bulk heterojunction” structure through assembly of novel skutterudite nanocrystals with different Yb-doping content. Combination of significant increase in carrier transport through heterojunction structure and reduction in long-range acoustic phonon transmission by two-phase mixture resulted in enhanced power factor and reduced lattice thermal conductivity. As a result, the figure-of-merit (zT) of heterojunction TE material is improved by more than 35% compared with pristine single homogeneous material. Using these improved TE materials, a high module conversion efficiency of ~9.15% was obtained when operating between 650 °C and 50 °C. This is one of the highest conversion efficiency among the practically measured single stage modules.
KW - Bulk heterojunction
KW - Conversion efficiency
KW - Nano grain engineering
KW - Skutterudite
KW - Thermoelectric
UR - http://www.scopus.com/inward/record.url?scp=85074486079&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074486079&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2019.104193
DO - 10.1016/j.nanoen.2019.104193
M3 - Article
AN - SCOPUS:85074486079
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
M1 - 104193
ER -