Intrinsically Ultralow Thermal Conductive Inorganic Solids for High Thermoelectric Performance

2021 ◽  
Author(s):  
Moinak Dutta ◽  
Debattam Sarkar ◽  
Kanishka Biswas
Keyword(s):  
Thermal Conductivity ◽  
Solid State ◽  
Thermoelectric Materials ◽  
Electrical Transport ◽  
Phonon Transport ◽  
Heat Energy ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
Inorganic Solids

Thermoelectric materials which can convert heat energy to electricity relies on crystalline inorganic solid state compounds exhibiting low phonon transport (i.e. low thermal conductivity) without much inhibiting the electrical transport....

Thermoelectric Performance of ZrNX (X = Cl, Br, I) Monolayers

2021 ◽  
Author(s):  
Wenwu Shi ◽  
Nina Ge ◽  
Xinzhong Wang ◽  
Zhiguo Wang
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
High Power ◽  
Thermoelectric Materials ◽  
Lattice Thermal Conductivity ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
High Power Factor

Low thermal conductivity and high power factor are essential for the efficient thermoelectric materials. The lattice thermal conductivity can be reduced by reducing the dimension of materials, thus improving the...

Novel Thermal Transport in Stable Binary Cd5.7Yb Quasicrystals

2001 ◽  
Vol 691 ◽  
Author(s):  
A.L. Pope ◽  
T.M. Tritt ◽  
R. Gagnon ◽  
J. Strom-Olsen
Keyword(s):  
Thermal Conductivity ◽  
Temperature Dependence ◽  
Thermoelectric Materials ◽  
Thermal Transport ◽  
Electrical Transport ◽  
Electronic Contribution ◽  
Lattice Contribution ◽  
Low Thermal Conductivity ◽  
Transport Measurements ◽  
Measured Thermal Conductivity

ABSTRACTQuasicrystalline materials have been investigated for application as thermoelectric materials due to their inherently low thermal conductivity. With the discovery of a new stable, binary Cd5.7Yb quasicrystal, thermal and electrical transport measurements have been performed on these materials. It is found that the electronic contribution to the thermal conductivity calculated from the Wiedemann-Franz relationship is comparable to or greater than the total measured thermal conductivity, leaving the appearance of a “negligible lattice contribution.” In addition, no semblance of the lattice contribution appears in the temperature dependence of the thermal conductivity. The thermal conductivity increases linearly with temperature above 75K and proportional to T3/4 between 2 K and 75 K.

Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals

2018 ◽  
Vol 6 (21) ◽  
pp. 10048-10056 ◽  
Author(s):  
Wenke He ◽  
Dongyang Wang ◽  
Jin-Feng Dong ◽  
Yang Qiu ◽  
Liangwei Fu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Electrical Transport Properties ◽  
Band Structures ◽  
Low Thermal Conductivity ◽  
Earth Abundant ◽  
High Figure

Enhanced electrical transport properties and low thermal conductivity lead to high figure of merit (ZT) over the whole temperature range in Na-doped SnS crystals.

Tuning SnSe/SnS hetero-interfaces to enhance thermoelectric performance

2018 ◽  
Vol 11 (04) ◽  
pp. 1850069 ◽  
Author(s):  
Xuerui Liu ◽  
Shuankui Li ◽  
Tinyang Liu ◽  
Weiming Zhu ◽  
Rui Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Multiple Scales ◽  
Phonon Transport ◽  
Thermoelectric Performance ◽  
Energy Filtering ◽  
Promising Strategy ◽  
Filtering Effect ◽  
Heterogeneous Nanostructure

With the development of nanotechnology, thermoelectric materials with complex heterogeneous nanostructure offer a promising approach to improve the thermoelectric performance. In this work, SnSe/SnS hetero-nanosheet was tuned by the epitaxial growth of SnSe on the few layers of SnS nanosheets. The heterojunction interface can optimize the carrier/phonon transport behavior by energy filtering effect and scattering the phonon in multiple scales. Compared with pristine SnSe, the power factor of SnSe/SnS hetero-nanosheet increases from 2.2[Formula: see text][Formula: see text]V/cmK2 to 3.21[Formula: see text][Formula: see text]V/cmK2 at 773[Formula: see text]K, whereas the thermal conductivity decreases significantly from 0.65[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] to 0.48[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] at 773[Formula: see text]K. The maximum ZT of 0.5 is obtained at 773[Formula: see text]K in the SnSe/SnS hetero-nanosheets, which is 89% higher than pristine SnSe. This approach is proved to be a promising strategy to design high performance thermoelectric materials.

scholarly journals Decoupling electron and phonon transport in single-nanowire hybrid materials for high-performance thermoelectrics

2021 ◽  
Vol 7 (20) ◽  
pp. eabe6000
Author(s):  
Lin Yang ◽  
Madeleine P. Gordon ◽  
Akanksha K. Menon ◽  
Alexandra Bruefach ◽  
Kyle Haas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Transport ◽  
Electrical Transport ◽  
High Performance ◽  
Figure Of Merit ◽  
Phonon Transport ◽  
Core Shell ◽  
Nanowire Diameter ◽  
High Performing ◽  
Polycrystalline Thin Films

Organic-inorganic hybrids have recently emerged as a class of high-performing thermoelectric materials that are lightweight and mechanically flexible. However, the fundamental electrical and thermal transport in these materials has remained elusive due to the heterogeneity of bulk, polycrystalline, thin films reported thus far. Here, we systematically investigate a model hybrid comprising a single core/shell nanowire of Te-PEDOT:PSS. We show that as the nanowire diameter is reduced, the electrical conductivity increases and the thermal conductivity decreases, while the Seebeck coefficient remains nearly constant—this collectively results in a figure of merit, ZT, of 0.54 at 400 K. The origin of the decoupling of charge and heat transport lies in the fact that electrical transport occurs through the organic shell, while thermal transport is driven by the inorganic core. This study establishes design principles for high-performing thermoelectrics that leverage the unique interactions occurring at the interfaces of hybrid nanowires.

scholarly journals High thermoelectric performance enabled by convergence of nested conduction bands in Pb7Bi4Se13 with low thermal conductivity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lei Hu ◽  
Yue-Wen Fang ◽  
Feiyu Qin ◽  
Xun Cao ◽  
Xiaoxu Zhao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Waste Heat ◽  
Low Frequency ◽  
Thermoelectric Performance ◽  
Environmental Crisis ◽  
Quality Factors ◽  
Thermoelectric Efficiency ◽  
Low Thermal Conductivity ◽  
Conduction Bands ◽  
Thermoelectric Energy

AbstractThermoelectrics enable waste heat recovery, holding promises in relieving energy and environmental crisis. Lillianite materials have been long-term ignored due to low thermoelectric efficiency. Herein we report the discovery of superior thermoelectric performance in Pb7Bi4Se13 based lillianites, with a peak figure of merit, zT of 1.35 at 800 K and a high average zT of 0.92 (450–800 K). A unique quality factor is established to predict and evaluate thermoelectric performances. It considers both band nonparabolicity and band gaps, commonly negligible in conventional quality factors. Such appealing performance is attributed to the convergence of effectively nested conduction bands, providing a high number of valley degeneracy, and a low thermal conductivity, stemming from large lattice anharmonicity, low-frequency localized Einstein modes and the coexistence of high-density moiré fringes and nanoscale defects. This work rekindles the vision that Pb7Bi4Se13 based lillianites are promising candidates for highly efficient thermoelectric energy conversion.

Low Thermal Conductivity and Enhanced Thermoelectric Performance in In and Lu Double-Filled CoSb3 Skutterudites

2011 ◽  
Vol 40 (5) ◽  
pp. 611-614 ◽  
Author(s):  
G. D. Tang ◽  
Z. H. Wang ◽  
X. N. Xu ◽  
Y. He ◽  
L. Qiu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity

scholarly journals Thermoelectric properties of Cu3SbSe3 with intrinsically ultralow lattice thermal conductivity

2014 ◽  
Vol 2 (38) ◽  
pp. 15829-15835 ◽  
Author(s):  
Kriti Tyagi ◽  
Bhasker Gahtori ◽  
Sivaiah Bathula ◽  
A. K. Srivastava ◽  
A. K. Shukla ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solid State ◽  
Spark Plasma Sintering ◽  
Thermoelectric Properties ◽  
Solid State Reaction ◽  
Electrical Transport ◽  
Single Phase ◽  
Lattice Thermal Conductivity ◽  
Plasma Sintering ◽  
Spark Plasma

Intrinsically ultra-low thermal conductivity and electrical transport in single-phase Cu2SbSe3 synthesized employing a solid state reaction and spark plasma sintering.

Ultra-low thermal conductivity and high thermoelectric performance realized in a Cu3SbSe4 based system

2021 ◽  
Vol 5 (1) ◽  
pp. 324-332
Author(s):  
J. M. Li ◽  
H. W. Ming ◽  
B. L. Zhang ◽  
C. J. Song ◽  
L. Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
Sn Doping ◽  
Temperature Range ◽  
System P

Cu3SbSe4-Based materials were fabricated through Sn-doping and AgSb0.98Ge0.02Se2 incorporation and their thermoelectric properties were investigated in the temperature range from 300 K to 675 K.

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