A Solvent Viscosity-dependent Thermoelectric Conversion Efficiency

2021 ◽  
Keyword(s):  
Organic Solvent ◽  
Seebeck Coefficient ◽  
Conversion Efficiency ◽  
Viscosity Coefficient ◽  
Solvent Viscosity ◽  
Thermoelectric Conversion ◽  
Redox Pair ◽  
Empirical Rule

We found a beautiful empirical rule (α ∝ <em>η</em><sup>-0.4</sup>) between the electrochemical Seebeck coefficient <em>α</em> for Fe<sup>2+</sup>/Fe<sup>3+</sup> redox pair and viscosity coefficient <em>η</em> of the organic solvent.

Nematic Ordering Driven by Atomic-scale Multipoles

2021 ◽  
Vol 1 ◽  
Author(s):  
Satoru Hayami
Keyword(s):  
Organic Solvent ◽  
Seebeck Coefficient ◽  
Viscosity Coefficient ◽  
Atomic Scale ◽  
Nematic Ordering ◽  
Redox Pair ◽  
Empirical Rule

We found a beautiful empirical rule (α ∝ <em>η</em><sup>-0.4</sup>) between the electrochemical Seebeck coefficient <em>α</em> for Fe<sup>2+</sup>/Fe<sup>3+</sup> redox pair and viscosity coefficient <em>η</em> of the organic solvent.

Bayesian optimization-based design of defect gamma-graphyne nanoribbons with high thermoelectric conversion efficiency

Carbon ◽  
2021 ◽  
Vol 176 ◽  
pp. 52-60
Author(s):  
Chunfeng Cui ◽  
Tao Ouyang ◽  
Chao Tang ◽  
Chaoyu He ◽  
Jin Li ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Bayesian Optimization ◽  
Thermoelectric Conversion ◽  
Optimization Based Design

Physical Metallurgy Inspired Nano-Features for Enhancement of Thermoelectric Conversion Efficiency

2018 ◽  
Vol 1 (9) ◽  
pp. 1800072 ◽  
Author(s):  
Yaron Amouyal ◽  
Yaniv Gelbstein ◽  
David Fuks
Keyword(s):  
Conversion Efficiency ◽  
Physical Metallurgy ◽  
Thermoelectric Conversion

scholarly journals Effect of microstructure on thermoelectric conversion efficiency in metastable δ-phase AgSbTe2

2021 ◽  
pp. 117443
Author(s):  
Jae Ki Lee ◽  
Byungki Ryu ◽  
Sungjin Park ◽  
Ji Hee Son ◽  
Jongho Park ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Thermoelectric Conversion ◽  
Δ Phase ◽  
Effect Of Microstructure

scholarly journals Exceptional thermoelectric performance in Mg3Sb0.6Bi1.4 for low-grade waste heat recovery

2019 ◽  
Vol 12 (3) ◽  
pp. 965-971 ◽  
Author(s):  
Kazuki Imasato ◽  
Stephen Dongmin Kang ◽  
G. Jeffrey Snyder
Keyword(s):  
Conversion Efficiency ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Type Material ◽  
Low Grade ◽  
Thermoelectric Conversion

An n-type material with intrinsically higher thermoelectric conversion efficiency than Bi2Te3 in the low-grade waste-heat range has finally been developed.

Ultralight and highly compressible coal oxide-modified graphene aerogels for organic solvent absorption and light-to-heat conversion

2020 ◽  
Vol 44 (6) ◽  
pp. 2228-2235 ◽  
Author(s):  
Shengchao Hou ◽  
Yan Lv ◽  
Xueyan Wu ◽  
Jixi Guo ◽  
Qingqing Sun ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Conversion Efficiency ◽  
Low Cost ◽  
Thermal Conversion ◽  
Absorption Capacity ◽  
Solar Thermal ◽  
Graphene Aerogels ◽  
Solvent Absorption ◽  
Modified Graphene ◽  
High Absorption

Ultralight, hydrophobic, highly compressible and low-cost coal oxide-modified graphene aerogels exhibit high absorption capacity and high solar thermal conversion efficiency.

Design and evaluation of n-type Si1-xGex as a thermoelectric-conversion material

2007 ◽  
Vol 1044 ◽  
Author(s):  
Tomohiro Imai ◽  
Tsutomu Iida ◽  
Yuki Miyata ◽  
Takashi Itoh ◽  
Hiroki Funashima ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Electronic Band Structure ◽  
Local Density ◽  
Band Structure Calculation ◽  
Full Potential ◽  
Electronic Band ◽  
Thermoelectric Conversion ◽  
High Seebeck Coefficient ◽  
Flapw Method

AbstractSi1-xGex alloys show the high power generating efficiency as a thermoelectric- conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si1-xGex is gained by the local atomic configuration rather than the Ge concentration.

The Effect of Solvent on the Seebeck Coefficient and Thermocell Performance of Cobalt Bipyridyl and Iron Ferri/Ferrocyanide Redox Couples

2019 ◽  
Vol 72 (9) ◽  
pp. 709 ◽  
Author(s):  
Abuzar Taheri ◽  
Douglas R. MacFarlane ◽  
Cristina Pozo-Gonzalo ◽  
Jennifer M. Pringle
Keyword(s):  
Organic Solvent ◽  
Seebeck Coefficient ◽  
Mixed Solvent ◽  
Waste Heat ◽  
Redox Couple ◽  
Seebeck Coefficients ◽  
Effect Of Solvent ◽  
Redox Couples ◽  
Ligand Interactions ◽  
Solvent Systems

The conversion of thermal energy to electricity using thermoelectrochemical cells (thermocells) is a developing approach to harvesting waste heat. The performance of a thermocell is highly dependent on the solvent used in the electrolyte, but the interplay of the various solvent effects is not yet well understood. Here, using the redox couples [Co(bpy)3][BF4]2/3 (bpy=2,2′-bipyridyl) and (Et4N)3/(NH4)4Fe(CN)6, which have been designed to allow dissolution in different solvent systems (aqueous, non-aqueous, and mixed solvent), the effect of solvent on the Seebeck coefficient (Se) and cell performance was studied. The highest Se for a cobalt-based redox couple measured thus far is reported. Different trends in the Seebeck coefficients of the two redox couples as a function of the ratio of organic solvent to water were observed. The cobalt redox couple produced a more positive Se in organic solvent than in water, whereas addition of water to organic solvent resulted in a more negative Se for Fe(CN)6 3−/4−. UV-vis and IR investigations of the redox couples indicate that Se is affected by changes in solvent–ligand interactions in the different solvent systems.

Improved Reversibility of Liquid Lithium-Ammonia Solutions in Vacuum Tube

2014 ◽  
Vol 605 ◽  
pp. 306-309
Author(s):  
Miae Kim ◽  
Ji Beom Kim ◽  
Joon Hyeon Jeon
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Liquid Lithium ◽  
Thermoelectric Power Generation ◽  
Thermoelectric Conversion ◽  
Pressure Equilibrium ◽  
Long Time ◽  
Solution Reaction

Lithium-ammonia (Li-NH3) solutions are possible to be successfully made under the vacuum condition but there still remains a problem of undergoing stable and reliable decomposition in vacuum for high-efficiency thermoelectric power generation. This paper describes a new method, which uses a tube giving pressure equilibrium between closed ends, for improving the thermoelectric conversion efficiency of Li-NH3solutions in vacuum. Thermoelectric experimental results show that solution reaction in the tube proceeds stably and efficiently, and this potentially leads to the improved reversibility of the reaction for deriving the long-time, high-efficiency thermoelectric power.

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