Structure and thermoelectric performance of β-Cu2Se doped with Fe, Ni, Mn, In, Zn or Sm

Peng, Ping; Gong, Zhe; Liu, F.S.; Huang, Menglin; Ao, W.Q.; Li, Y.; Li, J.Q.

doi:10.1016/j.intermet.2016.05.012

Cited by 64 publications

(46 citation statements)

References 24 publications

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“…Finally, the overall thermal conductivity decreased, and the overall figure of merit could be further improved as shown in Figure 5. The peak values for the figure of merit appear to be 1.2 at 823 K for the samples sintered at 1173 K for 2 h. Although the zT values obtained are slightly smaller than those reported work using SPS [5,[25][26][27], hot press [28], water quenching/liquid nitrogen quenching [7] methods, the fabrication method employed in this work is very simple and has a low cost.…”

Section: Thermoelectric Performancementioning

confidence: 56%

Study of Conventional Sintered Cu2Se Thermoelectric Material

2019

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Lead-free thermoelectric material, copper chalcogenides, have been attracting much interest from many research and industrial applications owing to their high capability of harvesting energy from heat. The state-of-the-art copper chalcogenides are commonly fabricated by the spark plasma sintering (SPS) and hot pressing (HP) techniques. Those methods are still costly and complicated particularly when compared to the conventional solid-state sintering method. Here, we report an easy-to-fabricate lead-free copper(I)-selenium (Cu 2 Se) that was fabricated using the conventional sintering method. The fabrication conditions, including sintering temperature and dwelling time, have been systematically studied to optimize the thermoelectric performance of Cu 2 Se. The optimized zT value for the pure Cu 2 Se was found to be 1.2 for the sample sintered at 1173 K for 2 h. The study shows that Cu 2 Se developed using the simple and low-cost techniques could exhibit comparable thermoelectric performance when compared with those fabricated by the SPS method, which provides an alternative potential technique to synthesize high-performance thermoelectric materials in a cost-effective way for industrialization.

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Section: Thermoelectric Performancementioning

confidence: 56%

Study of Conventional Sintered Cu2Se Thermoelectric Material

2019

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“…Element‐doping and composition off‐stoichiometry are the two general and effective approaches to tune carrier concentrations. However, most of the elements have very low doping limit in liquid‐like materials,11f,24 thus the effect of element‐doping on carrier concentrations regulation is usually not very obvious. In contrast, the latter approach, i.e., composition off‐stoichiometry, is proved to be effective in tuning carrier concentrations in a wide range, especially for those liquid‐like materials with a large range of intrinsic lattice defects.…”

Section: Strategies For Improving Te Performance Beyond Plec Conceptmentioning

confidence: 99%

“…The solid symbols represent data of nominally stoichiometric Cu 2 M samples 7,8b,g,h,k,m,n,28. The hollow symbols represent data of Cu deficient Cu 2−δ M samples 8j,24. The half‐up solid symbols represent data of solid solutions 8l,o,26–29.…”

Section: Strategies For Improving Te Performance Beyond Plec Conceptmentioning

confidence: 99%

“…On the other hand, the nanostructures introduce many internal interfaces to scatter phonons, leading to a significantly reduction in lattice thermal conductivity. The nanostructure engineering has been widely used in liquid‐like materials 8b,f,j,24d,40. Yang et al synthesized Cu 2 Se nanoplates by using a facile and large‐scale solvothermal method 8b.…”

Section: Strategies For Improving Te Performance Beyond Plec Conceptmentioning

confidence: 99%

“…Soon afterward, various fabrication methods, including melt‐annealing, melt‐solidification,8c high‐energy ball milling,8a,40a self‐propagating high‐temperature synthesis (SHS),8g solid‐state explosive reaction,8f and solvothermal method,8b,40d have been adopted to synthesize Cu 2− δ Se. Meanwhile, various strategies, such as element doping or alloying,8l,24,55b,56 forming nanocomposites or hybrids,8d,e,38e,57 have been used to further improve the TE performance. As such, high zT values range from 1.5 to 2.6 have been reported in Cu 2− δ Se.…”

Section: Typical Liquid‐like Te Materialsmentioning

confidence: 99%

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Recent Advances in Liquid‐Like Thermoelectric Materials

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Shi

et al. 2019

Adv Funct Materials

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Thermoelectric technology has attracted great attention due to its ability to recover and convert waste heat into readily available electric energy. Among the various candidate materials, liquid‐like compounds have received tremendous research interest on account of their intrinsically ultralow lattice thermal conductivity, tunable electrical properties, and high thermoelectric performance. Despite their complex phase transitions and diverse crystal structures, liquid‐like materials have two independent sublattices in common: one rigid sublattice formed by immobile ions for the free transport of electrons and one liquid‐like sublattice consisting of highly mobile ions to interrupt the thermal transports. This review first outlines the common structural features of liquid‐like thermoelectrics, along with their unusual electron and phonon transport behaviors that well satisfy the concept of “phonon‐liquid electron‐crystal.” Next, some commonly adopted strategies for further improving their thermoelectric performance are highlighted. The main progress achieved in the typical liquid‐like TE materials is then summarized, with an emphasis on their diverse crystal structures, common characteristics, and unique transport properties. The recent understandings on the stability issue of liquid‐like TE materials are also introduced. Finally, an outlook is given for the liquid‐like materials with the aim to boost further development in this exciting scientific subfield.

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Energy‐Saving Pathways for Thermoelectric Nanomaterial Synthesis: Hydrothermal/Solvothermal, Microwave‐Assisted, Solution‐Based, and Powder Processing

2022

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The pillars of Green Chemistry necessitate the development of new chemical methodologies and processes that can benefit chemical synthesis in terms of energy efficiency, conservation of resources, product selectivity, operational simplicity and, crucially, health, safety, and environmental impact. Implementation of green principles whenever possible can spur the growth of benign scientific technologies by considering environmental, economical, and societal sustainability in parallel. These principles seem especially important in the context of the manufacture of materials for sustainable energy and environmental applications. In this review, the production of energy conversion materials is taken as an exemplar, by examining the recent growth in the energy-efficient synthesis of thermoelectric nanomaterials for use in devices for thermal energy harvesting. Specifically, "soft chemistry" techniques such as solution-based, solvothermal, microwave-assisted, and mechanochemical (ball-milling) methods as viable and sustainable alternatives to processes performed at high temperature and/or pressure are focused. How some of these new approaches are also considered to thermoelectric materials fabrication can influence the properties and performance of the nanomaterials so-produced and the prospects of developing such techniques further.

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Structure and thermoelectric performance of β-Cu2Se doped with Fe, Ni, Mn, In, Zn or Sm

Cited by 64 publications

References 24 publications

Study of Conventional Sintered Cu2Se Thermoelectric Material

Study of Conventional Sintered Cu2Se Thermoelectric Material

Recent Advances in Liquid‐Like Thermoelectric Materials

Energy‐Saving Pathways for Thermoelectric Nanomaterial Synthesis: Hydrothermal/Solvothermal, Microwave‐Assisted, Solution‐Based, and Powder Processing

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