Ce Filling Limit and Its Influence on Thermoelectric Performance of Fe3CoSb12-Based Skutterudite Grown by a Temperature Gradient Zone Melting Method

Li, Xuguang; Liu, Wei‐Di; Li, Dou; Zhu, Jianglong; Feng, Zhenyu; Yang, Bin; Zhong, Hong; Shi, Xiao‐Lei; Chen, Huajun

doi:10.3390/ma14226810

Cited by 4 publications

(2 citation statements)

References 64 publications

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“…As we can see, the σ of all p-type films initially rises with temperature increasing, showing typical semiconductor behavior; moreover, the positive S value indicates that the films are all p-type films. Additionally, | S | decreases at high temperatures due to bipolar diffusion effects 70 – 72 . Finally, we achieve a high S 2 σ of >100 μW m −1 K −2 at 653 K when x = 1.25.…”

Section: Resultsmentioning

confidence: 99%

“…The deposition process utilized a PLD system (Neocera 120) with self-made targets. For instance, a high-purity (99.98%) Ce-doped Fe 3 CoSb 12 target was obtained via the temperature gradient zone melting (TGZM) route 26 , 70 , 72 , 79 , 80 . PI substrates with sizes of 33 mm × 33 mm × 0.125 mm underwent ultrasonic cleaning for 20 min in acetone, 10 min in absolute ethyl alcohol, and 10 min in deionized water, followed by drying in an oven.…”

Section: Methodsmentioning

confidence: 99%

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High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications

Li,

Shi,

Zhu

et al. 2024

Nat Commun

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P-type Fe3CoSb12-based skutterudite thin films are successfully fabricated, exhibiting high thermoelectric performance, stability, and flexibility at medium-to-high temperatures, based on preparing custom target materials and employing advanced pulsed laser deposition techniques to address the bonding challenge between the thin films and high-temperature flexible polyimide substrates. Through the optimization of fabrication processing and nominal doping concentration of Ce, the thin films show a power factor of >100 μW m−1 K−2 and a ZT close to 0.6 at 653 K. After >2000 bending cycle tests at a radius of 4 mm, only a 6 % change in resistivity can be observed. Additionally, the assembled p-type Fe3CoSb12-based flexible device exhibits a power density of 135.7 µW cm−2 under a temperature difference of 100 K with the hot side at 623 K. This work fills a gap in the realization of flexible thermoelectric devices in the medium-to-high-temperature range and holds significant practical application value.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications

Li,

Shi,

Zhu

et al. 2024

Nat Commun

Self Cite

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A Novel Electronegative Guest‐Filled Skutterudite‐Based Thermoelectric Generator with an Efficiency of 6.0%

Wang

et al. 2022

Adv Energy and Sustain Res

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Electronegative guest‐filled skutterudites (EN‐SKDs) are considered one of the most promising thermoelectric materials for next‐generation thermoelectric generators (TEGs). However, the practical application of EN‐SKDs in TEGs is still a huge challenge because of their unsatisfactory zT value (less than 1.0). Herein, Ge, Te‐codoped electronegative sulfur‐filled skutterudites of S x Co4Sb11Ge0.2Te0.8 (x = 0, 0.05, 0.1, 0.2, 0.25) are synthesized. The optimal zT value of as high as 1.45 at 823 K with a low room‐temperature lattice thermal conductivity of 1.98 W m−1 K−1 is achieved by S0.25Co4Sb11Ge0.2Te0.8. Such performance is competitive with those of traditional TE materials and among one of the best EN‐SKDs. The excellence is attributed to the synergistic effect of the disorder caused by Ge, Te co‐doping at Sb‐site and the “rattling” effect of electronegative element S. Furthermore, a novel EN‐SKD‐based TEG is prepared for the first time through an integrated welding process and exhibits a high efficiency of 6.0% at the temperature difference of 475 K. This work provides valuable guidance for designing advanced thermoelectric materials and paves a way toward high‐performance EN‐SKD‐based TEGs.

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Holistic Exploration of Structural, Electronic, Magnetic, Transport, Mechanical, and Thermodynamic Characteristics, Including Curie Temperature Analysis

Nayak,

Srivastava,

Gupta

2023

ACS Omega

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Through intricate calculations, the density functional theory (DFT) implemented in the Wien2k code was employed to comprehensively investigate a wide range of material characteristics. Our study encompasses an exhaustive analysis of structural stability, electronic properties, magnetic behaviors, transport phenomena, mechanical responses, and thermodynamic profiles of two notable instances of filled Skutterudites, namely, CeNi 4 P 12 and DyCo 4 Sb 12 , which have been thoroughly explored. These computations were performed using the WIEN 2K code, combining local orbitals and the full-potential linearized augmented plane-wave approach. The findings provided insight into the wide range of properties of these materials. In this methodology, the exchange–correlation potential relies on the local-density approximation. We conducted the calculations with and without incorporating spin–orbit interactions. The results obtained provide information about the lattice constant, bulk modulus, and pressure derivative. The stability, as indicated by the P–V graphical plot, suggests that there are no structural phase transitions from the cubic symmetry structure. Notably, our work includes an examination of Curie temperatures, which are pivotal in understanding magnetic phase transitions. The validated elastic properties further support the material’s stability and corroborate its ductile nature. These alloys should be considered for spintronic and thermoelectric applications due to their estimated transport characteristics and the observed ductile nature. To enhance our understanding of the thermal stability of antimony-based compounds, we have made reliable estimations of the thermophysical characteristics. By integrating theoretical insights with practical implications, we bridge the gap between fundamental understanding and material design applications. Using DFT in the Wien2k framework, we discover connections and patterns among different properties, showing how to create materials with specific functions and better performance. This approach not only advances our fundamental comprehension of materials but also promises innovation across various technological domains.

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Ce Filling Limit and Its Influence on Thermoelectric Performance of Fe3CoSb12-Based Skutterudite Grown by a Temperature Gradient Zone Melting Method

Cited by 4 publications

References 64 publications

High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications

High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications

A Novel Electronegative Guest‐Filled Skutterudite‐Based Thermoelectric Generator with an Efficiency of 6.0%

Holistic Exploration of Structural, Electronic, Magnetic, Transport, Mechanical, and Thermodynamic Characteristics, Including Curie Temperature Analysis

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