Room-Temperature Pressure-Induced Nanostructural CuInTe2 Thermoelectric Material with Low Thermal Conductivity

2014 ◽  
Vol 53 (13) ◽  
pp. 6844-6849 ◽  
Author(s):  
Atsuko Kosuga ◽  
Kouhei Umekage ◽  
Mie Matsuzawa ◽  
Yasuhiro Sakamoto ◽  
Ikuya Yamada
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Room Temperature ◽  
Low Thermal Conductivity

Nanostructured monoclinic Cu2Se as a near-room-temperature thermoelectric material

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20536-20542
Author(s):  
Jie Chen ◽  
Taoyi Liu ◽  
Deyu Bao ◽  
Bin Zhang ◽  
Guang Han ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Low Thermal Conductivity

Nanostructured monoclinic Cu2Se with low thermal conductivity shows a figure of merit of 0.72 at 380 K.

scholarly journals Impact of the iron substitution on the thermoelectric properties of Co 1− x Fe x S 2 ( x  ≤ 0.30)

2019 ◽  
Vol 377 (2152) ◽  
pp. 20180337 ◽  
Author(s):  
Ulises Acevedo Salas ◽  
Ismail Fourati ◽  
Jean Juraszek ◽  
Fabienne Richomme ◽  
Denis Pelloquin ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Room Temperature ◽  
Low Carbon ◽  
Energy Materials ◽  
Work Samples ◽  
Lattice Part

The strong interplay between magnetism and transport can tune the thermoelectric properties in chalcogenides and oxides. In the case of ferromagnetic CoS 2 pyrite, it was previously shown that the power factor is large at room temperature, reaching 1 mW m −1  K −2 and abruptly increases for temperatures below the Curie transition ( T C ), an increase potentially due to a magnonic effect on the Seebeck ( S ) coefficient. The too large thermal conductivity approximately equal to 10.5 W m −1  K −1 at room temperature prevents this pyrite from being a good thermoelectric material. In this work, samples belonging to the Co 1− x Fe x S 2 pyrite family ( x  = 0, 0.15 and 0.30) have thus been investigated in order to modify the thermal properties by the introduction of disorder on the Co site. We show here that the thermal conductivity can indeed be reduced by such a substitution, but that this substitution predominantly induces a reduction of the electronic part of the thermal conductivity and not of the lattice part. Interestingly, the magnonic contribution to S below T C disappears as x increases, while at high T , S tends to a very similar value (close to −42 µV K −1 ) for all the samples investigated. This article is part of a discussion meeting issue ‘Energy materials for a low carbon future’.

Ag8SiTe6: A New Thermoelectric Material with Low Thermal Conductivity

2009 ◽  
Vol 48 (1) ◽  
pp. 011603 ◽  
Author(s):  
Anek Charoenphakdee ◽  
Ken Kurosaki ◽  
Hiroaki Muta ◽  
Masayoshi Uno ◽  
Shinsuke Yamanaka
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Low Thermal Conductivity

scholarly journals SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

2014 ◽  
Vol 2 (48) ◽  
pp. 20849-20854 ◽  
Author(s):  
Gangjian Tan ◽  
Fengyuan Shi ◽  
Hui Sun ◽  
Li-Dong Zhao ◽  
Ctirad Uher ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Seebeck Coefficient ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Alloying Effect ◽  
Low Thermal Conductivity ◽  
Interface Scattering

SnTe–AgBiTe2 is not only a solid solution but a nanocomposite. The alloying effect coupled with intense interface scattering leads to considerably decreased lattice thermal conductivity. Bi is much more powerful in neutralizing holes than Sb, giving rise to a much higher Seebeck coefficient. A high ZT was then obtained.

scholarly journals Low thermal conductivity in a modular inorganic material with bonding anisotropy and mismatch

Science ◽  
2021 ◽  
pp. eabh1619
Author(s):  
Quinn D. Gibson ◽  
Tianqi Zhao ◽  
Luke M. Daniels ◽  
Helen C. Walker ◽  
Ramzy Daou ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Room Temperature ◽  
Inorganic Material ◽  
Phonon Dispersion ◽  
Spatial Arrangement ◽  
Vibrational Modes ◽  
Crystalline Materials ◽  
Low Thermal Conductivity ◽  
Transverse Modes ◽  
Different Types

The thermal conductivity of crystalline materials cannot be arbitrarily low as the intrinsic limit depends on the phonon dispersion. We used complementary strategies to suppress the contribution of the longitudinal and transverse phonons to heat transport in layered materials containing different types of intrinsic chemical interface. BiOCl and Bi2O2Se encapsulate these design principles for longitudinal and transverse modes respectively, and the bulk superlattice material Bi4O4SeCl2 combines these effects by ordering both interface types within its unit cell to reach an extremely low thermal conductivity of 0.1 W K−1 m−1 at room temperature along its stacking direction. This value comes within a factor of four of air. We demonstrated that chemical control of the spatial arrangement of distinct interfaces can synergically modify vibrational modes to minimize thermal conductivity.

Where Should We Look For High Zt Materials: Suggestions From Theory.

2000 ◽  
Vol 626 ◽  
Author(s):  
M. Fornari ◽  
D. J. Singh ◽  
I. I. Mazin ◽  
J. L. Feldman
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
First Principles ◽  
Room Temperature ◽  
First Principles Calculations ◽  
High Electrical Conductivity ◽  
Bulk Materials ◽  
Low Thermal Conductivity ◽  
Computational Exploration ◽  
Single Material

ABSTRACTThe key challenges in discovering new high ZT thermoelectrics are understanding how the nearly contradictory requirements of high electrical conductivity, high thermopower and low thermal conductivity can be achieved in a single material and based on this identifying suitable compounds. First principles calculations provide a material specific microscopic window into the relevant properties and their origins. We illustrate the utility of the approach by presenting specific examples of compounds belonging to the class of skutterudites that are or are not good thermoelectrics along with the microscopic reasons. Based on our computational exploration we make a suggestion for achieving higher values of ZT at room temperature in bulk materials, namely n-type La(Ru,Rh)4Sb12 with high La-filling.

Improving power factor and figure of merit of p-type CuSbSe2 via introducing Sb vacancies

2021 ◽  
Author(s):  
Tao Chen ◽  
Hongwei Ming ◽  
Xiaoying Qin ◽  
Chen Zhu ◽  
Lulu Huang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Figure Of Merit ◽  
Environment Friendly ◽  
Low Thermal Conductivity ◽  
P Type

As a thermoelectric material, p-type CuSbSe2 has attracted much attention due to its intrinsic low thermal conductivity and environment-friendly constituents. In this work, Sb deficient compounds CuSb1-xSe2 (x=0-0.12) are prepared...

Conductivity studies of Ni and Gd substituted BiCoO3

2014 ◽  
Vol 28 (05) ◽  
pp. 1450034 ◽  
Author(s):  
T. Ramachandran ◽  
N. E. Rajeevan ◽  
P. P. Pradyumnan
Keyword(s):  
Thermal Conductivity ◽  
Room Temperature ◽  
Structural Studies ◽  
Reaction Route ◽  
Low Thermal Conductivity ◽  
Sem Micrograph ◽  
New Material ◽  
Cubic Structure ◽  
Solid State Reaction Route ◽  
Room Temperature Raman Spectrum

In this paper, we report the synthesis, thermal and electrical property studies of Ni 0.5 Gd 0.2 Bi 0.3 CoO 3, a new material for thermoelectric applications. The material was synthesized by solid state reaction route taking BiCoO 3 as basic matrix by substituting bismuth with nickel and gadolinium. Structural studies using room temperature XRD and room temperature Raman spectrum established cubic structure for Ni 0.5 Bi 0.5 CoO 3 and tetragonal structure for Ni 0.5 Gd 0.2 Bi 0.3 CoO 3. The SEM micrograph of the samples revealed crystallites of micrometer dimension with varying grain size. The sample showed interestingly low thermal conductivity and VRH mechanism was found to dominate in the electrical conduction at low temperature regime. The low thermal conductivity and moderate electrical conductivity is suggestive of strong candidature of the material for thermoelectric applications.

Elephant ivory: A low thermal conductivity, high strength nanocomposite

2006 ◽  
Vol 21 (1) ◽  
pp. 287-292 ◽  
Author(s):  
Michael B. Jakubinek ◽  
Champika J. Samarasekera ◽  
Mary Anne White
Keyword(s):  
Thermal Conductivity ◽  
Room Temperature ◽  
High Strength ◽  
Mean Free Path ◽  
Boundary Scattering ◽  
Low Thermal Conductivity ◽  
Recent Interest ◽  
Elephant Ivory ◽  
Nanocomposite Structures ◽  
Structure Properties

There has been much recent interest in heat transport in nanostructures, and alsoin the structure, properties, and growth of biological materials. Here we present measurements of thermal properties of a nanostructured biomineral, ivory. The room-temperature thermal conductivity of ivory is anomalously low in comparison with its constituent components. Low-temperature (2–300 K) measurements ofthermal conductivity and heat capacity reveal a glass-like temperature dependenceof the thermal conductivity and phonon mean free path, consistent with increased phonon-boundary scattering associated with nanostructure. These results suggest that biomineral-like nanocomposite structures could be useful in the design of novel high-strength materials for low thermal conductivity applications.

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