Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(33), P. 22276 - 22285
Published: Jan. 1, 2024
Through annealing the precursor layer Bi x Sb 1− combined with thickness variation, Seebeck coefficient and electrical conductivity are increased simultaneously in (Bi ) 2 Te 3 . A resultant high PF of 37.78 μW cm −1 K −2 is obtained.
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)
Published: April 13, 2024
Bismuth-telluride-based alloy has long been considered as the most promising candidate for low-grade waste heat power generation. However, optimizing thermoelectric performance of n-type Bi
Language: Английский
Citations
19
Materials Chemistry and Physics, Journal Year: 2025, Volume and Issue: 333, P. 130344 - 130344
Published: Jan. 15, 2025
Language: Английский
Citations
2
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 2, 2025
Abstract Bismuth telluride (Bi 2 Te 3 ) has been the only commercialized material in thermoelectric cooling and waste heat recovery. However, inferior performance for n‐type Bi (Te, Se) largely restricts practical applications. In this study, additional Ag atoms are introduced utilizing lattice plainification strategy to enhance electrical performance. Observations indicate that situate van der Waals layers, acting as dopants increase carrier concentration, bonding with adjacent intercalating form electron transport channels, while also suppressing formation of vacancies boost mobility, substantially favoring transport. Consequently, 2.79 Se 0.21 I 0.004 +0.3%Ag achieves an excellent room‐temperature ZT ≈1.1, Te2 .79 + 0.4%Ag demonstrates a higher average ≈1.1 at 300–523 K. Furthermore, full‐scale cooler using optimized combined commercial p‐type 0.5 Sb 1.5 achieved maximum temperature difference (Δ T max ≈68.3 K 300 larger Δ ≈84.8 343 Additionally, 0.4%Ag/Bi ‐based power generator realizes conversion efficiency ≈6.0% under ≈240 These results outperform devices, illustrating effectiveness thermoelectrics.
Language: Английский
Citations
1
Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown
Published: March 29, 2025
Abstract This study investigates the thermoelectric (TE) properties of a benzodithiophene‐based conjugated polymer (PBDTT‐DPP) combined with single‐walled carbon nanotubes (SWCNTs) for flexible, solution‐processable generators (TEGs). Composite films are prepared varying SWCNT content, achieving optimal performance at 50 wt.% SWCNT. Further optimization through FeCl₃ doping and thermal annealing 200 °C significantly enhanced electrical conductivity overall TE performance. The doped annealed composite film exhibited power factor 135 ± 8 µW mK −2 253 maximum ZT value 0.17. Spectroscopic electronic analyses revealed that realigned energy bands formed charge‐transfer complexes, contributing to improved properties. Practical application is demonstrated fabrication arc‐shaped TEGs capable harvesting from curved heat sources. achieved peak output 0.66 Δ T = 100 K, showcasing its potential low‐grade waste recovery in industrial settings. research advances understanding organic materials offers promising solutions sustainable
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162858 - 162858
Published: April 1, 2025
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(23), P. 30598 - 30606
Published: May 31, 2024
Interdiffusion and solid–solid phase reaction at the interface between thermoelectric (TE) materials electrode critically influence interfacial transport properties overall energy conversion efficiency during service. Here, microstructural evolution diffusion mechanisms interfaces most widely used Bi2Te3-based TE materials, n-type Bi2Te2.7Se0.3 (BTS) p-type Bi0.5Sb1.5Te3 (BST), Ni electrodes were investigated atomic resolution using spherical aberration-corrected scanning transmission electron microscopy (STEM). The BTS(0001)/Ni BST(0001)/Ni constructed by depositing nanoparticles on mechanically exfoliated BTS BST bulk subsequent annealing. is initially dominated into matrix to form NiAs-type NiM intermetallics, while trans-quintuple-layer only occurs in Sb-rich BST. Bi-rich more influenced Ni–Te preferential reaction, resulting abnormal grain growth formation of tilted rotated interfaces. Bi forms a double layer or Bi2[Bi2(Te,Se)3] as annealing temperature increases, thin film greatly accelerates rate, elucidated situ heating STEM. results provide essential structural details understand prevent degradation device performance.
Language: Английский
Citations
2
Materials Today Energy, Journal Year: 2024, Volume and Issue: 44, P. 101643 - 101643
Published: July 4, 2024
Bi2Te3-based materials stand out as the top-performing material for thermoelectric applications at room temperature. However, its inherent rigidity has posed challenges widespread usage in flexible conversion systems. Recent endeavors have focused on achieving films through bulk thinning, physical/chemical deposition, paste casting, well template method. These efforts led to a surge research publications. This review aims offer comprehensive update synthesis approaches, microstructures, performances/flexibility, and underlying mechanisms. Future should focus investigating innovative deposition techniques, exploring new composite phases/templates, refining fabrication parameters, among others, enhance performances flexibility.
Language: Английский
Citations
2
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(35), P. 46280 - 46288
Published: Aug. 20, 2024
Layered materials have emerged as stars in the realm of nanomaterials, showcasing exceptional versatility various fields. This investigation employed a thermally driven method to intercalate cobalt (Co) into van der Waals gaps (CuI)0.002Bi2Te2.7Se0.3 crystals and investigated mechanism by which intercalated Co enhances thermoelectric performance material. intercalation decreases carrier concentration, thereby improving Seebeck coefficient decreasing both mobility electrical conductivity. These effects result significant enhancement power factor above 400 K. Theoretical electronic structure calculations provide insights role this Additionally, presence significantly phonon scattering, boosting figure-of-merit, ZT 1.33 at 350 K for 0.17% intercalation. findings highlight potential incorporation energy efficiency n-type Bi2Te2.7Se0.3, offering avenues further optimization applications.
Language: Английский
Citations
1
Materials Today Communications, Journal Year: 2024, Volume and Issue: 40, P. 110186 - 110186
Published: Aug. 1, 2024
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(44), P. 60588 - 60598
Published: Oct. 25, 2024
Bi2Te2.7Se0.3-based alloys are conventional n-type thermoelectric materials for solid-state cooling and heat harvest near room temperature; high performance over a wide temperature range superior mechanical properties essential their use in practical devices. In this work, we demonstrated that decent can also be realized an unconventional composite with nominal composition of Bi2Te2.3Se0.7 since the emergence Bi2Te2Se phase Se ordered occupation could induce enlargement electronic band gap. Follow-up Cu/Na codoping generate dynamic optimization carrier concentration, significantly broadening performance. Further B incorporation annealing treatment resulted obvious grain refinement stacking fault structures, which help pushing ultimate maximal figure merit up to ∼1.3 at 423 K average value ∼1.2 300–573 K. This work might provide insights further research on bismuth tellurides other materials.
Language: Английский
Citations
1