Enhanced thermoelectric performance of higher manganese silicides by shock-induced high-density dislocations

2019 ◽  
Vol 7 (7) ◽  
pp. 3384-3390 ◽  
Author(s):  
Zhipeng Gao ◽  
Zhengwei Xiong ◽  
Jun Li ◽  
Chengjia Lu ◽  
Ganghua Zhang ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Shock Compression ◽  
Thermoelectric Materials ◽  
High Density ◽  
Thermoelectric Performance ◽  
Higher Manganese Silicides ◽  
Novel Method

The shock-compression is a novel method to generate high-density dislocations in the thermoelectric materials and to enhance their thermoelectric properties.

Enhancing the thermoelectric performance of Sn0.5Ge0.5Te via doping with Sb/Bi and alloying with Cu2Te: Optimization of transport properties and thermal conductivities

2020 ◽  
Vol 49 (18) ◽  
pp. 6135-6144
Author(s):  
Shaochang Song ◽  
Chun-Wan Timothy Lo ◽  
Masoud Aminzare ◽  
Yu-Chih Tseng ◽  
Suneesh Meledath Valiyaveettil ◽  
...  
Keyword(s):  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Thermoelectric Performance ◽  
Thermal Conductivities

SnTe-based thermoelectric materials are studied as potential substitutes for PbTe. Ge and Bi substitutions combined with the Cu2Te alloying can significantly improve thermoelectric properties of SnTe as shown for (Sn0.5Ge0.5)0.91Bi0.06Te(Cu2Te)0.05.

scholarly journals Enhancement of Thermoelectric Properties of Layered Chalcogenide Materials

2020 ◽  
Vol 59 (1) ◽  
pp. 371-378
Author(s):  
Manal M. Alsalama ◽  
Hicham Hamoudi ◽  
Ahmed Abdala ◽  
Zafar K. Ghouri ◽  
Khaled M. Youssef
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Basic Knowledge ◽  
Physical Parameters ◽  
Maximum Improvement ◽  
Chalcogenide Materials ◽  
Layered Chalcogenide

AbstractThermoelectric materials have long been proven to be effective in converting heat energy into electricity and vice versa. Since semiconductors have been used in the thermoelectric field, much work has been done to improve their efficiency. The interrelation between their thermoelectric physical parameters (Seebeck coefficient, electrical conductivity, and thermal conductivity) required special tailoring in order to get the maximum improvement in their performance. Various approaches have been reported in the research for developing thermoelectric performance, including doping and alloying, nanostructuring, and nanocompositing. Among different types of thermoelectric materials, layered chalcogenide materials are unique materials with distinctive properties. They have low self-thermal conductivity, and their layered structure allows them to be modified easily to improve their thermoelectric performance. In this review, basic knowledge of thermoelectric concepts and challenges for enhancing the figure of merit is provided. It discusses briefly different groups of layered chalcogenide thermoelectric materials with their structure and thermoelectric properties. It also reports different approaches in the literature for improving their performance and the recent progress done in this field. It highlights graphene as a promising nano additive to layered chalcogenide materials’ matrix and shows its effect on enhancing their figure of merit.

scholarly journals Electronic and Thermoelectric Properties of V2O5, MgV2O5, and CaV2O5

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 453 ◽  
Author(s):  
Xiaofei Sheng ◽  
Zhuhong Li ◽  
Yajuan Cheng
Keyword(s):  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Van Der Waals ◽  
Thermoelectric Performance ◽  
Extreme Condition ◽  
Electronic Band ◽  
Classical Transport

Developing new thermoelectric materials with high performance can broaden the thermoelectric family and is the key to fulfill extreme condition applications. In this work, we proposed two new high-temperature thermoelectric materials—MgV2O5 and CaV2O5—which are derived from the interface engineered V2O5. The electronic and thermoelectric properties of V2O5, MgV2O5, and CaV2O5 were calculated based on first principles and Boltzmann semi-classical transport equations. It was found that although V2O5 possessed a large Seebeck coefficient, its large band gap strongly limited the electrical conductivity, hence hindering it from being good thermoelectric material. With the intercalation of Mg and Ca atoms into the van der Waals interfaces of V2O5, i.e., forming MgV2O5 and CaV2O5, the electronic band gaps could be dramatically reduced down to below 0.1 eV, which is beneficial for electrical conductivity. In MgV2O5 and CaV2O5, the Seebeck coefficient was not largely affected compared to V2O5. Consequently, the thermoelectric figure of merit was expected to be improved noticeably. Moreover, the intercalation of Mg and Ca atoms into the V2O5 van der Waals interfaces enhanced the anisotropic transport and thus provided a possible way for further engineering of their thermoelectric performance by nanostructuring. Our work provided theoretical guidelines for the improvement of thermoelectric performance in layered oxide materials.

scholarly journals Thermoelectric Materials: Thermoelectric Properties of Novel Semimetals: A Case Study of YbMnSb 2 (Adv. Mater. 7/2021)

2021 ◽  
Vol 33 (7) ◽  
pp. 2170051
Author(s):  
Yu Pan ◽  
Feng‐Ren Fan ◽  
Xiaochen Hong ◽  
Bin He ◽  
Congcong Le ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Materials

Effect of Electron-Phonon Coupling on Transport Properties of Monolayers of ZrS2, BiI3 and PbI2: A thermoelectric Perspective

2021 ◽  
Author(s):  
Gautam Sharma ◽  
Vineet Kumar Pandey ◽  
Shouvik Datta ◽  
Prasenjit Ghosh
Keyword(s):  
Relaxation Time ◽  
Band Structure ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Transport Coefficients ◽  
Electrical Energy ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Thermoelectric materials are used for conversion of waste heat to electrical energy. The transport coefficients that determine their thermoelectric properties depend on the band structure and the relaxation time of...

Effects of Nb doping on thermoelectric properties of Zn4Sb3 at high temperatures

2009 ◽  
Vol 24 (2) ◽  
pp. 430-435 ◽  
Author(s):  
D. Li ◽  
H.H. Hng ◽  
J. Ma ◽  
X.Y. Qin
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
High Temperatures ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Temperature Range ◽  
A Value ◽  
Nb Doping ◽  
Thermal Conductivities

The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1–xNbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb-doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995Nb0.005)4Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.

Fabrication of Bi-Te Based Thermoelectric Semiconductors by Using Hybrid Powders

2005 ◽  
Vol 297-300 ◽  
pp. 875-880
Author(s):  
Cheol Ho Lim ◽  
Ki Tae Kim ◽  
Yong Hwan Kim ◽  
Dong Choul Cho ◽  
Young Sup Lee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Single Crystals ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Bending Strength ◽  
Mixing Ratio ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
P Type

P-type Bi0.5Sb1.5Te3 compounds doped with 3wt% Te were fabricated by spark plasma sintering and their mechanical and thermoelectric properties were investigated. The sintered compounds with the bending strength of more than 50MPa and the figure-of-merit 2.9×10-3/K were obtained by controlling the mixing ratio of large powders (PL) and small powders (PS). Compared with the conventionally prepared single crystal thermoelectric materials, the bending strength was increased up to more than three times and the figure-of-merit Z was similar those of single crystals. It is expected that the mechanical properties could be improved by using hybrid powders without degradation of thermoelectric properties.

Significantly optimized thermoelectric properties in high-symmetry cubic Cu7PSe6 compounds via entropy engineering

2018 ◽  
Vol 6 (15) ◽  
pp. 6493-6502 ◽  
Author(s):  
Rui Chen ◽  
Pengfei Qiu ◽  
Binbin Jiang ◽  
Ping Hu ◽  
Yiming Zhang ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Configurational Entropy ◽  
Thermoelectric Performance ◽  
High Symmetry ◽  
Type Compound

Via introducing Te into the argyrodite-type compound Cu7PSe6, the configurational entropy is increased yielding the significantly enhanced thermoelectric performance.

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