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Liu X.♦, Jani R.♦, Orisakwe E.♦, Johnston C.♦, Chudziński P., Qu M.♦, Norton B.♦, Holmes N.♦, Kohanoff J.♦, Stella L.♦, Yin H.♦, Yazawa K.♦, State of the art in composition, fabrication, characterization, and modeling methods of cement-based thermoelectric materials for low-temperature applications,
Renewable and Sustainable Energy Reviews, ISSN: 1364-0321, DOI: 10.1016/j.rser.2020.110361, Vol.137, pp.110361-1-30, 2021Streszczenie: The worldwide energy crisis and environmental deterioration are probably humanity’s greatest challenges. Thermoelectricity, which allows for the mutual conversion between thermal and electrical energy, has become a promising technology to alleviate this challenge. Increasingly more research focuses on how to fabricate and apply thermoelectric materials for harvesting energy and regulating the indoor thermal environment. However, only a few studies have focused on cementitious materials with thermoelectric potential. Thermoelectric cement is a composite material in which particular additives can enhance the thermoelectric performance of ordinary cement. By potentially replacing traditional construction materials with thermoelectric cement in building ap-plications, electricity could be generated from waste heat, reducing the use of fossil fuels, and supplementing other renewable energy sources like solar and wind. This article presents a review of fundamentals, fabrication, characterization, composition, and performance, as well as modeling methods and opportunities for thermo-electric cement composites. The literature reviewed covers the period from 1998 to 2020 related to thermo-electric cement. It also presents the challenges and problems to overcome for further development and provide future research directions of thermoelectric cement. Słowa kluczowe: thermoelectric cement composites, additives, thermoelectric generator, thermoelectric cooler, seebeck coefficient, figure of merit Afiliacje autorów:
Liu X. | - | Imperial College London (GB) | Jani R. | - | inna afiliacja | Orisakwe E. | - | inna afiliacja | Johnston C. | - | inna afiliacja | Chudziński P. | - | IPPT PAN | Qu M. | - | inna afiliacja | Norton B. | - | inna afiliacja | Holmes N. | - | inna afiliacja | Kohanoff J. | - | Queen’s University Belfast (IE) | Stella L. | - | inna afiliacja | Yin H. | - | inna afiliacja | Yazawa K. | - | inna afiliacja |
| | 200p. |
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Troncoso J.F.♦, Chudziński P., Todorov T.N.♦, Aguado-Puente P.♦, Grüning M.♦, Kohanoff J.J.♦, Thermal conductivity of porous polycrystalline PbTe,
PHYSICAL REVIEW MATERIALS, ISSN: 2475-9953, DOI: 10.1103/PhysRevMaterials.5.014604, Vol.5, pp.014604-1-14, 2021Streszczenie: PbTe is a leading thermoelectric material at intermediate temperatures, largely thanks to its low lattice thermal conductivity. However, its efficiency is too low to compete with other forms of power generation. This efficiency can be effectively enhanced by designing nanostructures capable of scattering phonons over a wide range of length scales to reduce the lattice thermal conductivity. The presence of grain boundaries can reduce the thermal conductivity to ∼0.5 W m −1 K−1 for small acancy concentrations and grain sizes. However, grains anneal at finite temperature, and equilibrium and metastable grain size distributions determine the extent of the reduction in thermal conductivity. In the present work, we propose a phase-field model informed by molecular dynamics simulations to study the annealing process in PbTe and how it is affected by the presence of grain boundaries and voids. We find that the thermal conductivity of PbTe is reduced by up to 35% in the porous material at low temperatures. We observe that a phase transition at a finite density of voids governs the kinetics of impeding grain growth by Zener pinning. Afiliacje autorów:
Troncoso J.F. | - | Queen’s University Belfast (IE) | Chudziński P. | - | IPPT PAN | Todorov T.N. | - | Queen’s University Belfast (IE) | Aguado-Puente P. | - | Queen’s University Belfast (IE) | Grüning M. | - | Queen’s University Belfast (IE) | Kohanoff J.J. | - | Queen’s University Belfast (IE) |
| | 70p. |