Nanoscale Texturing and Interfaces in Compositionally Modified Ca3Co4O9 with Enhanced Thermoelectric Performance
| العنوان: | Nanoscale Texturing and Interfaces in Compositionally Modified Ca3Co4O9 with Enhanced Thermoelectric Performance |
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| المؤلفون: | Deepam Maurya, Bed Poudel, Myung Eun Song, Michael A. Meeker, Wenjie Li, Scott T. Huxtable, Heon Joong Lee, Shashank Priya, Min Gyu Kang, Giti A. Khodaparast, Jue Wang |
| المصدر: | ACS Omega, Vol 3, Iss 9, Pp 10798-10810 (2018) ACS Omega |
| بيانات النشر: | American Chemical Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Nanostructure, business.industry, General Chemical Engineering, Oxide, Spark plasma sintering, Sintering, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Thermoelectric materials, 01 natural sciences, Article, 0104 chemical sciences, lcsh:Chemistry, chemistry.chemical_compound, Thermal conductivity, chemistry, lcsh:QD1-999, Thermoelectric effect, Optoelectronics, Figure of merit, 0210 nano-technology, business |
| الوصف: | Oxide thermoelectric materials are nontoxic, chemically and thermally stable in oxidizing environments, cost-effective, and comparatively simpler to synthesize. However, thermoelectric oxides exhibit comparatively lower figure of merit (ZT) than that of metallic alloy counterparts. In this study, nanoscale texturing and interface engineering were utilized for enhancing the thermoelectric performance of oxide polycrystalline Ca3Co4O9 materials, which were synthesized using conventional sintering and spark plasma sintering (SPS) techniques. Results demonstrated that nanoscale platelets (having layered structure with nanoscale spacing) and metallic inclusions provide effective scattering of phonons, resulting in lower thermal conductivity and higher ZT. Thermoelectric measurement direction was found to have a significant effect on the magnitude of ZT because of the strong anisotropy in the transport properties induced by the layered nanostructure. The peak ZT value for the Ca2.85Lu0.15Co3.95Ga0.05O9 specimen measured along both perpendicular and parallel directions with respect to the SPS pressure axis is found be 0.16 at 630 °C and 0.04 at 580 °C, respectively. The peak ZT of 0.25 at 670 °C was observed for the spark plasma-sintered Ca2.95Ag0.05Co4O9 sample. The estimated output power of 2.15 W was obtained for the full size model, showing high-temperature thermoelectric applicability of this nanostructured material without significant oxidation. |
| اللغة: | English |
| تدمد: | 2470-1343 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b070b6782f943148186ec044063d99dbTest https://doaj.org/article/614faf0e7b5e4fc6bb928e3c8ec241f3Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b070b6782f943148186ec044063d99db |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24701343 |
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