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Zhang F, Zhu L, Song M, Cao X, Pang X, Liang P, Peng Z, Chao X, Yang Z, Wu D. Giant Deformation Induced Staggered-Layer Structure Promoting the Thermoelectric and Mechanical Performance in n-Type Bi 2(Te, Se) 3. Small 2024:e2401070. [PMID: 38528434 DOI: 10.1002/smll.202401070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/13/2024] [Indexed: 03/27/2024]
Abstract
Bismuth telluride has long been recognized as the most promising near-room temperature thermoelectric material for commercial application; however, the thermoelectric performance for n-type Bi2(Te, Se)3-based alloys is far lagging behind that of its p-type counterpart. In this work, a giant hot deformation (GD) process is implemented in an optimized Bi2Te2.694Se0.3I0.006+3 wt%K2Bi8Se13 precursor and generates a unique staggered-layer structure. The staggered-layered structure, which is only observed in severely deformed crystals, exhibits a preferential scattering on heat-carrying phonons rather than charge-carrying electrons, thus resulting in an ultralow lattice thermal conductivity while retaining high-weight carrier mobility. Moreover, the staggered-layer structure is located adjacent to the van der Waals gap in Bi2(Te, Se)3 lattice and is able to strengthen the interaction between anion layers across the gap, leading to obviously improved compressive strength and Vickers hardness. Consequently, a high peak figure of merit ZT of ≈ 1.3 at 423 K, and an average ZT of ≈ 1.2 at 300-473 K can be achieved in GD sample. This study demonstrates that the GD process can successfully decouple the electrical and thermal transports with simultaneously enhanced mechanic performance.
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Affiliation(s)
- Fudong Zhang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Lujun Zhu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, China
| | - Mingzhen Song
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiaofang Cao
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiaohui Pang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Pengfei Liang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, China
| | - Zhanhui Peng
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiaolian Chao
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Zupei Yang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Di Wu
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
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Zhu Y, Jin Y, Zhu J, Dong X, Liu M, Sun Y, Guo M, Li F, Guo F, Zhang Q, Liu Z, Cai W, Sui J. Design of N-Type Textured Bi 2 Te 3 with Robust Mechanical Properties for Thermoelectric Micro-Refrigeration Application. Adv Sci (Weinh) 2023; 10:e2206395. [PMID: 36581501 PMCID: PMC9951298 DOI: 10.1002/advs.202206395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Thermoelectric refrigeration is one of the mature techniques used for cooling applications, with the great advantage of miniaturization over traditional compression refrigeration. Due to the anisotropic thermoelectric properties of n-type bismuth telluride (Bi2 Te3 ) alloys, these two common methods, including the liquid phase hot deformation (LPHD) and traditional hot forging (HF) methods, are of considerable importance for texture engineering to enhance performance. However, their effects on thermoelectric and mechanical properties are still controversial and not clear yet. Moreover, there has been little documentation of mechanical properties related to micro-refrigeration applications. In this work, the above-mentioned methods are separately employed to control the macroscopic grain orientation for bulk n-type Bi2 Te3 samples. The HF method enabled the stabilization of both composition and carrier concentration, therefore yielding a higher quality factor to compare with that of LPHD samples, supported by DFT calculations. In addition to superior thermoelectric performance, the HF sample also exhibited robust mechanical properties due to the presence of nano-scale distortion and dense dislocation, which is the prerequisite for realizing ultra-precision machining. This work helps to pave the way for the utilization of n-type Bi2 Te3 for commercial micro-refrigeration applications.
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Affiliation(s)
- Yu‐Ke Zhu
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Yifan Jin
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Jianbo Zhu
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Xingyan Dong
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Ming Liu
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Yuxin Sun
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Muchun Guo
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Fushan Li
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Fengkai Guo
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Qian Zhang
- School of Materials Science and EngineeringInstitute of Materials Genome & Big DataHarbin Institute of TechnologyShenzhen518055P. R. China
| | - Zihang Liu
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Wei Cai
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
| | - Jiehe Sui
- State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001P. R. China
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Gayner C, Natanzon Y, Kauffmann Y, Amouyal Y. Topologically-Enhanced Thermoelectric Properties in Bi 2Te 3-Based Compounds: Effects of Grain Size and Misorientation. ACS Appl Mater Interfaces 2022; 14:49730-49745. [PMID: 36286236 DOI: 10.1021/acsami.2c12843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Topological insulators (TIs) and thermoelectric (TE) materials seem to belong to distinct physical realms; however, in practice, they both share common characteristics. Introducing concepts from TIs into TE materials to enhance their performance and achieve better understanding of electronic transport requires extensive research. Particularly, grain size, misorientation, and grain boundary (GB) character are of utmost importance to attain effective charge carrier transport in TE polycrystals; these factors, however, have not been thoroughly explored. Herein, we investigate the correlation between grain size, misorientation, and lattice strain in Bi2Te3 and its TI signature, aiming to improve its TE performance. We reveal an unusual behavior showing that electron mobility increases upon the increase of grain size, reaching at a maximum value of 495 cm2/V·s for an optimum grain size of 600 nm and most-frequent GB misorientation angle of 60° and then decreases with increasing grain size. It is also indicated that the combined effects of grain size reduction and point defects induce lattice strain in the Bi2Te3-matrix that is essential to trigger the TI contribution to TE transport. This trend is corroborated by first-principles calculations showing that compressive strains form multiple valleys in the valence band and opens the TI band gap. Such a combination of physical phenomena in a well-known TE material is unique and can promote our understanding of the nature of TE transport with implications for TE energy conversion.
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Affiliation(s)
- Chhatrasal Gayner
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa32000, Israel
| | - Yuriy Natanzon
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa32000, Israel
| | - Yaron Kauffmann
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa32000, Israel
| | - Yaron Amouyal
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Haifa32000, Israel
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Yoon J, Jang H, Oh MW, Hilberath T, Hollmann F, Jung YS, Park CB. Heat-fueled enzymatic cascade for selective oxyfunctionalization of hydrocarbons. Nat Commun 2022; 13:3741. [PMID: 35768427 PMCID: PMC9243031 DOI: 10.1038/s41467-022-31363-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/13/2022] [Indexed: 11/09/2022] Open
Abstract
Heat is a fundamental feedstock, where more than 80% of global energy comes from fossil-based heating process. However, it is mostly wasted due to a lack of proper techniques of utilizing the low-quality waste heat (<100 °C). Here we report thermoelectrobiocatalytic chemical conversion systems for heat-fueled, enzyme-catalyzed oxyfunctionalization reactions. Thermoelectric bismuth telluride (Bi2Te3) directly converts low-temperature waste heat into chemical energy in the form of H2O2 near room temperature. The streamlined reaction scheme (e.g., water, heat, enzyme, and thermoelectric material) promotes enantio- and chemo-selective hydroxylation and epoxidation of representative substrates (e.g., ethylbenzene, propylbenzene, tetralin, cyclohexane, cis-β-methylstyrene), achieving a maximum total turnover number of rAaeUPO (TTNrAaeUPO) over 32000. Direct conversion of vehicle exhaust heat into the enantiopure enzymatic product with a rate of 231.4 μM h−1 during urban driving envisions the practical feasibility of thermoelectrobiocatalysis. Thermoelectric materials enable us to convert heat into electricity, but their application has been limited to high-temperature heat sources. Here, the authors show the direct conversion of low-grade waste heat into chemical energy via combining thermoelectric materials with biocatalysts below 100 °C.
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Affiliation(s)
- Jaeho Yoon
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Hanhwi Jang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Min-Wook Oh
- Department of Materials Science and Engineering, Hanbat National University (HBNU), 125 Dongseodae-ro, Daejeon, 34158, Republic of Korea
| | - Thomas Hilberath
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft, 2629HZ, The Netherlands
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft, 2629HZ, The Netherlands
| | - Yeon Sik Jung
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea.
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea.
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