A High Performance Ag Alloyed Nano-scale n-type Bi2Te3 Based Thermoelectric Material

Chen, Si; Logothetis, Nikolaos; Ye, Lilei; Liu, Johan

doi:10.1016/j.matpr.2015.05.083

Cited by 20 publications

(5 citation statements)

References 17 publications

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“…The maximum power factor found in this study is 1.52⸱10 -3 at 100°C, and maximum Figure of Merit is of the order of 0.43 at 100°C. our findings are compatible with the results of Chen et al [24] who studied a silver alloyed n-type Bi 2 Te 3 . They showed that the addition of ag nanoparticles to Bi 2 Te 3 nanopowder yields Te material with a Figure of Merit of 1.48 at room temperature.…”

Section: Resultssupporting

confidence: 94%

“…They showed that the addition of ag nanoparticles to Bi 2 Te 3 nanopowder yields Te material with a Figure of Merit of 1.48 at room temperature. Thus, the reduction of the size of particles increased the Figure of Merit above 1.0 [24]. However, it is one of two studies of thermoelectric properties we found for ag-Bi-Te alloys.…”

Section: Resultsmentioning

confidence: 79%

“…Unfortunately, ternary Pb-Ge-Se alloys with the highest Seebeck coefficient [20] contain lead and selenium which are considered to be toxic. Consequently, some alternatives were found which contain silver [22][23][24], copper [25][26][27]. For example, ternary chalcogenide agSbTe 2 with GeTe addition (TaGS) has reached zT value above one [28].…”

Section: Introductionmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Drzewowska,

Lan,

Onderka

2021

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The resistivity, Seebeck coefficient and thermal diffusivity were determined for Bi 2 Te 3 + ag 2 Te composite mixtures. Subsequent measurements were carried out in the temperature range from 20 to 270°C, and for compositions from pure Bi 2 Te 3 to x ag 2 Te = 0.65 selected along the pseudo-binary section of ag-Bi-Te ternary system. it was found that conductivity vs. temperature dependence shows visible jump between 140 and 150°C in samples with highest ag 2 Te content, which is due to monoclinic => cubic ag 2 Te phase transformation. Measured Seebeck coefficient is negative for all samples indicating they are n-type semiconductors. evaluated power factor is of the order 1.52•10 -3 and it decreases with increasing ag 2 Te content (at. %). recalculated thermal conductivity is of the order of unity in w/(m k), and is decreasing with ag 2 Te addition. Finally, evaluated Figure of Merit is 0.43 at 100°C and decreases with temperature rise.

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Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Archives of Metallurgy and Materials

Drzewowska,

Lan,

Onderka

2021

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“…In the Pb 0.98 Na 0.02 Te-8% SrTe sample, the ZT value is 2.5 at 923 K, and the average ZT value is 1.67 in the range of 300–900 K. It is further proved that by optimizing the Na concentration, a ZT of 2.5 can be obtained at a lower temperature of about 800 K ( Xu et al, 2020a ). Alloying is currently the most widely used method to enhance the scattering of point defects, in Bi 2 Te 3 ( Hu et al, 2014 ; Chen et al, 2015 ), Pb(Te, Se) ( Pei et al, 2011 ), GeTe ( Chen et al, 2020 ) and Half-Heusler (HH) alloys ( Xue et al, 2016 ; Shen et al, 2018 ; Yu et al, 2018b ) have applications.…”

Section: Reduction Of Lattice Thermal Conductivitymentioning

confidence: 99%

Strategies to Improve the Thermoelectric Figure of Merit in Thermoelectric Functional Materials

Sun

Liu

et al. 2022

Front. Chem.

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In recent years, thermoelectric functional materials have been widely concerned in temperature difference power generation, electric refrigeration and integrated circui, and so on. In this paper, the design and research progress of thermoelectric materials around lifting ZT value in recent years are reviewed. Optimizing the carrier concentration to improve the Seebeck coefficient, the steady improvement of carrier mobility and the influence of energy band engineering on thermoelectric performance are discussed. In addition, the impact of lattice thermal conductivity on ZT value is also significant. We discuss the general law that the synergistic effect of different dimensions, scales, and crystal structures can reduce lattice thermal conductivity, and introduce the new application of electro-acoustic decoupling in thermoelectric materials. Finally, the research of thermoelectric materials is summarized and prospected in the hope of providing practical ideas for expanding the application and scale industrialization of thermoelectric devices.

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“…As known, the p‐type (Bi, Sb) 2 Te 3 has been reported with an extraordinary peak zT ≈ 1.86 at 320 K, [ 41 ] while the n‐type Se‐Bi 2 Te 3 exhibits a much lower peak zT < 1.2. The addition of Ag, Cu, Co, S, In, and so on boosts the TE performance of n‐type Bi 2 Te 3 ( Table 1 [ 44–68 ] ). Furthermore, the modification of synthesis routes, including the solvothermal, [ 44 ] Bridgman growth, [ 45 ] zone melting (ZM), [ 46 ] spark plasma sintering (SPS), [ 47 ] hot pressing (HP), [ 48 ] melt‐centrifugation (MC), [ 41,49 ] and so on, also influences the resultant transport properties.…”

Section: Revisiting the State‐of‐the‐art Te Alloys Via Phase Diagram Engineeringmentioning

confidence: 99%

Eliciting High‐Performance Thermoelectric Materials via Phase Diagram Engineering: A Review

Deng

Yen

Tsai

et al. 2021

Adv Energy and Sustain Res

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Alongside the evolution of technology timeline, environmental protection and energy sustainability significantly guide the research feast toward the high-performance green energy resources and technologies. [1,2] Alternatives to the fossil fuels that emit harmful greenhouse gases become desired, in which the thermoelectric (TE) materials have played an inevitable role since the 1960s. [3] One of TE technology features is the waste heat recovery via the Seebeck effect, [4] which allows the conversion between thermal energy and electricity. Such a TE generator produces precious electrical energy from any arbitrary interfaces where a temperature gradient exists, simultaneously boosting energy usage efficiency while eases global warming.Many TE materials are being explored for power generation applications, such as GeTe, [5] PbTe, [6,7] Bi 2 Te 3 , [8] and silicides. [9] Moreover, the TE cooler, which utilizes the Peltier effect, [4] emerges as a vital spot-cooling device assembled by all-solid-state materials. With the advantages of refrigerant-free and size-minimization, the TE cooler exhibits the advantages of refrigerant-free and size-minimization, which can be used as the next-generation cooling technology. [10] After more than 60 years of development, the practical application and potential coverage of TE technology are comprehensive. Nevertheless, a TE material's thermal-to-electric efficiency is still required to be boosted. In general, the TE figure-of-merit zT ¼ ðS 2 σÞT=κ positively relates to the performance of TE materials, in which the S is the Seebeck coefficient, σ ¼ ρ À1 refers to the electrical conductivity, and κ ¼ κ e þ κ L þ κ b comprises the total thermal conductivity κ, lattice thermal conductivity κ, and bipolar thermal conductivity κ b , respectively. Most importantly, the S, σ, and κ e have the carrier concentration n H as a common factor, which correlates and depends on each other. Therefore, the counterbalance between the thermal and electrical transport properties is essential to attain high zT values, which could be fulfilled by band structure engineering, [11] carrier optimization, [12,13] filtering effect, [14] , and so on. In parallel, the reduction in κ L also paves the way toward highperformance TE materials, mainly accomplished by all-scale defect engineering [15] and alloying effect. [16] Those imperfections introduce multiscale roadblocks, such as the interstitial/ antisite defect, dislocations, nanoprecipitates, and grain boundaries, aiming to impede the phonons with different wavelengths.Countless efforts bring the breakthroughs of zT value in succession. The peak zT grows less than unity in the 1960s to greater than 2.5 after 2015, [17] whose progress is slow yet steadily. Complex TE materials with various dopants are the primary targets, while different approaches can be adopted. [18,19] The

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A High Performance Ag Alloyed Nano-scale n-type Bi2Te3 Based Thermoelectric Material

Cited by 20 publications

References 17 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Strategies to Improve the Thermoelectric Figure of Merit in Thermoelectric Functional Materials

Eliciting High‐Performance Thermoelectric Materials via Phase Diagram Engineering: A Review

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