التفاصيل البيبلوغرافية
| العنوان: |
Enhanced Thermoelectric Performance in the SrTi 0.85 Nb 0.15 O 3 Oxide Nanocomposite with Fe 2 O 3 -Functionalized Graphene. |
| المؤلفون: |
Jana SS; Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, UP 208016, India., Chatterjee D; Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, UP 208016, India., Maiti T; Plasmonics and Perovskites Laboratory, Department of Materials Science and Engineering, IIT Kanpur, Kanpur, UP 208016, India. |
| المصدر: |
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2023 Oct 18; Vol. 15 (41), pp. 48246-48254. Date of Electronic Publication: 2023 Oct 05. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 101504991 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1944-8252 (Electronic) Linking ISSN: 19448244 NLM ISO Abbreviation: ACS Appl Mater Interfaces Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Washington, D.C. : American Chemical Society |
| مستخلص: |
Doped SrTiO 3 is considered one of the potential thermoelectric (TE) candidates but its TE figure of merit, ZT needs to be improved for practical application of electricity generation from high-grade waste-heat. In the present work, enhanced TE performance has been realized for SrTi 0.85 Nb 0.15 O 3 (STN) perovskite adopting the strategy of composite formation with Fe 2 O 3 -functionalized graphene (FGR). We have achieved a maximum electrical conductivity of 1.4 × 10 5 S m -1 for 1 wt % FGR added to STN, which is around 1185% larger than that of pristine STN. The presence of FGR in the STN matrix acts as a mobility booster of electrons, overcoming the effect of Anderson localization of electrons, which impedes the electron transport in STN. This is evident from the order of magnitude increase in weighted mobility of STN after FGR addition. Furthermore, the incorporation of FGR causes about a 34% decrease in the lattice thermal conductivity. The Debye-Callaway model demonstrates that the phonon-phonon Umklapp scattering is primarily responsible for reduced thermal conductivity. The presence of FGR sheets along the grain boundaries of STN, Fe 2 O 3 nanoparticles, and lattice imperfections gives rise to the glass-like temperature-independent phonon mean-free-path, especially above Debye temperature. The maximum ZT ∼ 0.57 has been obtained at 947 K for the 1 wt % FGR sample, which is around 420% higher than that of pristine STN. Furthermore, we have fabricated a prototype of a four-legged n-type TE module, demonstrating one of the highest power outputs of 18 mW among reported oxide thermoelectrics. |
| فهرسة مساهمة: |
Keywords: SrTiO3; composite; functionalized graphene; oxide; thermoelectric; waste-heat |
| تواريخ الأحداث: |
Date Created: 20231005 Latest Revision: 20231020 |
| رمز التحديث: |
20240628 |
| DOI: |
10.1021/acsami.3c10647 |
| PMID: |
37797267 |
| قاعدة البيانات: |
MEDLINE |
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