ZnGeSb2: a promising thermoelectric material with tunable ultra-high conductivity

2016 ◽  
Vol 18 (37) ◽  
pp. 26275-26283 ◽  
Author(s):  
P. C. Sreeparvathy ◽  
V. Kanchana ◽  
G. Vaitheeswaran ◽  
N. E. Christensen
Keyword(s):  
Electrical Conductivity ◽  
Relaxation Time ◽  
Thermoelectric Material ◽  
Power Factor ◽  
First Principles ◽  
High Conductivity ◽  
First Principles Calculations ◽  
High Electrical Conductivity

First principles calculations predict the promising thermoelectric material ZnGeSb2with a huge power factor (S2σ/τ) on the order of 3 × 1017W m−1K−2s−1, due to the ultra-high electrical conductivity scaled by a relaxation time of around 8.5 × 1025Ω−1m−1s−1, observed in its massive Dirac state.

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.

Evaluation of Cu-Ni-Based Alloys for Thermoelectric Energy Conversion

2021 ◽  
Vol 1016 ◽  
pp. 107-112
Author(s):  
Timon Steinhoff ◽  
Mario Wolf ◽  
Florian Nürnberger ◽  
Gregory Gerstein ◽  
Armin Feldhoff
Keyword(s):  
Electrical Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Partial Substitution ◽  
Specific Electrical Conductivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Arc Melting ◽  
Lattice Symmetry ◽  
Thermoelectric Energy

The recent revitalization of Ioffe plots (entropy conductivity versus electrical conductivity) reminds us that Isotan (Cu55Ni44Mn1) is an outstanding thermoelectric material with a power factor of up to 60 W cm-1 K-2 at a specific electrical conductivity of almost 20,000 S cm-1 at elevated temperature. Even though, Isotan is widely used in thermoelements for temperature measurement, its high open-circuited thermal conductivity of approximately 70 W cm-1 K-2 [1] hindered further research as a promising thermoelectric material. Isotan was chosen as a starting composition. Influence of partial substitution of Cu and Ni with heavy elements (Sn,W) on the thermoelectric properties was studied. The alloys were fabricated by arc-melting and microstructurally characterized for grain size and elemental composition by scanning electron microscope (SEM) combined with energy-dispersive X-ray (EDXS). Lattice symmetry and parameters were estimated by X-ray diffraction (XRD). Functional properties as Seebeck coefficient, electrical conductivity and power factor were used to evaluate the thermoelectric performance.

Theoretical search for high-performance thermoelectric donor–acceptor copolymers: the role of super-exchange couplings

2020 ◽  
Vol 8 (41) ◽  
pp. 21852-21861
Author(s):  
Xue Yong ◽  
Gang Wu ◽  
Wen Shi ◽  
Zicong Marvin Wong ◽  
Tianqi Deng ◽  
...  
Keyword(s):  
Effective Mass ◽  
Power Factor ◽  
First Principles ◽  
High Performance ◽  
First Principles Calculations ◽  
Thermoelectric Power Factor ◽  
Hole Effective Mass ◽  
Donor Acceptor ◽  
Weak Electron

First-principles calculations of a series of representing D–A copolymers demonstrated the strong Super-Exchange couplings induce not only small hole effective mass but also weak electron-phonon couplings, and eventually high thermoelectric power factor.

First-principles calculations and high thermoelectric performance of La–Nb doped SrTiO3 ceramics

2019 ◽  
Vol 7 (1) ◽  
pp. 236-247 ◽  
Author(s):  
Yan Li ◽  
Qing-Yu Hou ◽  
Xiao-Huan Wang ◽  
Hui-Jun Kang ◽  
Xinba Yaer ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Material ◽  
First Principles ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
First Principles Calculations ◽  
High Temperature Application ◽  
Temperature Application ◽  
Electrical Generation ◽  
Srtio3 Ceramics

SrTiO3 is a promising thermoelectric material for high temperature application of waste heat electrical generation.

Monolayer β-tellurene: a promising p-type thermoelectric material via first-principles calculations

Nanoscale ◽  
2019 ◽  
Vol 11 (39) ◽  
pp. 18116-18123 ◽  
Author(s):  
David Kipkemoi Sang ◽  
Teng Ding ◽  
Meng Nan Wu ◽  
Yu Li ◽  
Junqin Li ◽  
...  
Keyword(s):  
Thermoelectric Material ◽  
First Principles ◽  
First Principles Calculations ◽  
Charge Densities ◽  
P Type

Side and top views of monolayer 2D-β-Tellurene with difference charge densities (DCD).

Conductivity stability and its relationship with the filler network structure of elastomer composites with combined fibrous/layered nickel-coated fillers

RSC Advances ◽  
2014 ◽  
Vol 4 (61) ◽  
pp. 32482-32489 ◽  
Author(s):  
Nanying Ning ◽  
Suting Liu ◽  
Qian Shao ◽  
Shani Yan ◽  
Hua Zou ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Network Structure ◽  
High Conductivity ◽  
High Electrical Conductivity ◽  
Filler Network ◽  
Elastomer Composites

Conductive elastomer composites with high electrical conductivity and high conductivity stability were prepared by using combined fibrous/layered nickel-coated fillers.

The electrical conductivity of extracts from soils of various types, and its use in detecting infertility

1924 ◽  
Vol 14 (2) ◽  
pp. 198-203 ◽  
Author(s):  
W. R. G. Atkins
Keyword(s):  
Electrical Conductivity ◽  
High Conductivity ◽  
Aqueous Extracts ◽  
High Electrical Conductivity ◽  
Maximum Value ◽  
Bacterial Action ◽  
Infertile Soils

1. The electrical conductivity of aqueous extracts of soils, in the proportion of one of soil to five of water, varies according to the time of extraction. In the more fertile soils extraction for three to four hours gives less than half as great a conductivity as is given in 4 to 11 days.2. In peat the maximum value is reached almost at once, the extract having a high conductivity. The maximum value is also reached quickly in certain infertile soils, which give an extract of very low conductivity, closely similar to that of the purest upland streams.3. A high electrical conductivity in the extract may only indicate the presence of an excess of salts, and does not necessarily indicate a good soil. It seems, however, that a rapid increase in conductivity as extraction is prolonged indicates increased solubility, partly through bacterial action and may be considered as a useful indication of fertility. A low conductivity, which remains low on continued extraction, denotes a soil so insoluble as to be unfertile.

OLIN BRASS ALLOY C10200

Alloy Digest ◽  
2020 ◽  
Vol 69 (1) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Physical Properties ◽  
Elevated Temperatures ◽  
High Conductivity ◽  
High Electrical Conductivity ◽  
Brass Alloy

Abstract Olin Brass Alloy C10200 is an oxygen-free, high-conductivity copper. It is ideal for applications where extremely high electrical conductivity and resistance to hydrogen embrittlement are vital. Where glass-to-metal seals are required this material also provides the added advantage of developing an adherent, nonscaling oxide at elevated temperatures. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance. Filing Code: Cu-903. Producer or source: Olin Brass GBC Metals, LLC.

Electronic structure and transport properties of ternary skutterudite: CoX3/2Y3/2

2009 ◽  
Vol 1166 ◽  
Author(s):  
Dmitri Volja ◽  
Marco Fornari ◽  
Boris Kozinsky ◽  
Nicola Marzari
Keyword(s):  
Electronic Structure ◽  
Transport Properties ◽  
Valence Band ◽  
Power Factor ◽  
First Principles ◽  
First Principles Calculations ◽  
Wannier Functions ◽  
Effective Masses ◽  
Fundamental Cause ◽  
Parabolic Dispersion

AbstractElectronic properties of ternary skutterudites AX3/2Y3/2 (A=Co, X=Ge, Sn and Y=S, Te) are investigated using first principles calculations to clarify recent experimental results. Band derivatives are computed accurately within an approach based on Maximally Localized Wannier Functions (MLWFs). Band structures exhibit larger effective masses compared to parental binary CoSb3. Our results also indicate a more parabolic dispersion near the top of the valence band and a multivalley character in both conduction and valence band. Despite the improved thermopower these skutterudites has relatively low power factor due to increased resistivity. The fundamental cause of such large resistivity seems to be associated with the ionicity of the bonding.

Water content control during solution-based polymerization: a key to reach extremely high conductivity in PEDOT thin films

2020 ◽  
Vol 8 (48) ◽  
pp. 17254-17260
Author(s):  
Amélie Schultheiss ◽  
Alexandre Carella ◽  
Stéphanie Pouget ◽  
Jérôme Faure-Vincent ◽  
Renaud Demadrille ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Water Content ◽  
High Conductivity ◽  
High Electrical Conductivity ◽  
Careful Control

A careful control of the water content during PEDOT polymerization allow to reach extremely high electrical conductivity.

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