Enhanced thermoelectric property in superionic conductor Bi-doped Cu1.8S

Liang, Dou-Dou; Ge, Zhen‐Hua; Li, Hezhang; Zhang, Bo‐Ping; Fu, Li

doi:10.1016/j.jallcom.2017.02.295

Cited by 28 publications

(19 citation statements)

References 34 publications

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“…28.420°and 29.640° which are lower than those (28.448° and 29.675°) of the standard card (CuSbS 2 , PDF#88-0822) indicating an expanded CuSbS 2 lattice. A similar behavior was usually found in sulfur containing systems, which is attributed to the volatilization and/or loss of S in the MA and/or SPS process[14][15][16]20]. The shifting is observed at x = 0.1, but turns to weaken by further increasing x to 0.2 and even reversely shifts to low angle at x = 0.3, which reflects the shrinkage and enlargement of CuSbS 2 lattice.…”

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confidence: 73%

“…The σ of CuSbS 2 films was reported to be 0.03 [11], 10 -4 -10 -3 [12], and 10 -5 S•cm -1 [13], indicating the importance via obtaining a higher σ to enhance the TE performance of CuSbS 2 . Copper sulfides (Cu 2-x S, 0 ≤ x ≤ 1) have recently attracted extensive attention as TE materials benefiting from the inexpensive, nontoxic, and earth-abundant elements of Cu and S [2,14]. Among Cu 2-x S compounds, Cu 1.8 S is considered to be a promising TE material due to the stable structure and the feature of the superionic conductor.…”

Section: Introductionmentioning

confidence: 99%

“…is the content of volatilization and/or loss S during the MA and/or SPS process which depends on the preparation condition, y is the content of Cu rich in Cu 1+y SbS 2 and the sum of y 1 to y 4 . Equation(1)indicates that the vacancy S V •• and two electrons (e′) would generate when S is lacking[14,16,20]. Equation(2)indicates the formation of Cu 1+y SbS 2 , Cu 3 SbS 4 , and Cu 12 Sb 4 S 13 .…”

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confidence: 99%

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Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Tang

Liang

et al. 2019

J Adv Ceram

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Chalcostibite (CuSbS 2) is composed of earth-abundant elements and has a proper band gap (E g = 1.05 eV) as a thermoelectric (TE) material. Herein, we report the TE properties in the CuSbS 2 based composites with a mole ratio of (1-x)CuSbS 2-xCu 1.8 S (x = 0, 0.1, 0.2, 0.3), which were prepared by mechanical alloying (MA) combined with spark plasma sintering (SPS). X-ray diffraction (XRD) and back-scattered electron image (BSE) results indicate that a single phase of CuSbS 2 is synthesized at x = 0 and the samples consist of CuSbS 2 , Cu 3 SbS 4 , and Cu 12 Sb 4 S 13 at 0.1 ≤ x ≤ 0.3. The correlation between the phase structure, microstructure, and TE transport properties of the bulk samples is established. The electrical conductivity increases from 0.14 to 50.66 S•cm-1 at 723 K and at 0 ≤ x ≤ 0.03, while the Seebeck coefficient holds an appropriate value of 190.51 μV•K-1. The highest ZT value of 0.17 is obtained at 723 K and at x = 0.3 owing to the combination of a high PF 183 μW•m-1 •K-2 and a low κ 0.8 W•m-1 •K-1 .

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confidence: 73%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Tang

Liang

et al. 2019

J Adv Ceram

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“…Recently, the effect of Bi doping on thermoelectric transport properties of Cu 1.8 S has been reported by Zhang and co‐workers . A series of Bi x Cu 1.8− x S samples with x = 0, 0.004, 0.01, 0.014, and 0.02 are synthesized by mixing elemental powders using mechanical alloying and SPS.…”

Section: Strategies To Improve Thermoelectric Properties Of Copper Sumentioning

confidence: 99%

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

Mulla

Rabinal

2019

Energy Tech

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The depletion of nonrenewable energy sources insisted the search for new types of energy solutions. Thermoelectric conversion is one possible energy solution which converts waste heat into useful electricity. In the past several years, thermoelectric research developed many novel materials. Among these, most of the practically useful materials with better performance are based on Bi, Pb, Te, and Sb, but are toxic and expensive. There is a need of earth‐abundant, low‐cost, and less‐toxic compounds with superior thermoelectric performance so as to realize the large‐scale commercial applications. Recent studies have identified eco‐friendly thermoelectric materials based on the alloys of copper and sulfur, suggesting an alternative to the well‐established expensive thermoelectric materials. These compounds exhibit interesting electronic properties with better thermoelectric efficiency (zT). The structural properties permit to decouple electrical and thermal conductivities, which is an essential requirement to get improved efficiency. Several approaches, such as phase tuning, doping, nanostructure/microstructure designing, compound formation, etc., are chosen to increase the performance. On the whole, the present review summarizes the strategies and techniques that have been adopted to improve the thermoelectric behavior of copper sulfides and its compounds.

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“…The SPS then accomplishes the sintering process within several minutes, retaining the structures inherited from the MA-derived powders . The convenient and rapid MA & SPS method has been applied for many high-performance TE materials such as Bi 2 Te 3 -based alloys, PbTe-based alloys, selenides, , and sulfides, , which provides us a reliable method to synthesize Cu 2 S 1– x Te x compounds. Besides that, the high-energy ball milling and quick hot pressing method is a more popular and effective fabrication method to synthesize materials such as BiSbTe, AgSbSe 2 , and GeTe, especially for some compounds that are really difficult to prepare using the traditional methods such as skutterudite and α-MgAgSb …”

Section: Introductionmentioning

confidence: 99%

High Thermoelectric Figure of Merit Achieved in Cu₂S_1–xTe_x Alloys Synthesized by Mechanical Alloying and Spark Plasma Sintering

Yao

Zhang

Pei

et al. 2018

ACS Appl. Mater. Interfaces

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Chalcogenides have been considered as promising thermoelectric materials because of their low cost, nontoxicity, and environmental benignity. In this work, we synthesized a series of CuSTe (0 ≤ x ≤ 1) alloys by a facile, rapid method of mechanical alloying combined with spark plasma sintering process. The CuSTe system provides an excellent vision of the competition between pure phase and phase transformation, entropy-driven solid solution, and enthalpy-driven phase separation. When the Te concentration increases, the CuSTe system changed from the pure monoclinic CuS at x = 0 to monoclinic CuSTe solid solution at 0.02 ≤ x ≤ 0.06 and then transforms to hexagonal CuSTe solid solution at 0.08 ≤ x ≤ 0.1. The phase separation of hexagonal CuTe in the hexagonal CuS matrix occurs at 0.3 ≤ x ≤ 0.7 and finally forms the hexagonal CuTe at x = 1. Owing to the changed band structure and the coexisted CuS and CuTe phases, greatly enhanced power factor was achieved in all CuSTe (0< x < 1) alloys. Meanwhile, the point defect introduced by the substitution of Te/S atoms strengthened the phonon scattering, resulting in a lowered lattice thermal conductivity in most of these solid solutions. As a consequence, CuSTe exhibits a maximum ZT value of 1.18 at 723 K, which is about 3.7 and 14.8 times as compared to the values of pristine CuS (0.32) and CuTe (0.08), respectively.

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Enhanced thermoelectric property in superionic conductor Bi-doped Cu1.8S

Cited by 28 publications

References 34 publications

Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

High Thermoelectric Figure of Merit Achieved in Cu₂S_1–xTe_x Alloys Synthesized by Mechanical Alloying and Spark Plasma Sintering

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Enhanced thermoelectric property in superionic conductor Bi-doped Cu1.8S

Cited by 28 publications

References 34 publications

Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

High Thermoelectric Figure of Merit Achieved in Cu2S1–xTex Alloys Synthesized by Mechanical Alloying and Spark Plasma Sintering

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High Thermoelectric Figure of Merit Achieved in Cu₂S_1–xTe_x Alloys Synthesized by Mechanical Alloying and Spark Plasma Sintering