1
|
Chen J, Dong Z, Li Q, Ge B, Zhang J, Zhang Y, Luo J. Enhanced Thermoelectric Performance in Vacancy-Filling Heuslers due to Kondo-Like Effect. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2405858. [PMID: 38899584 DOI: 10.1002/adma.202405858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/15/2024] [Indexed: 06/21/2024]
Abstract
To improve thermoelectric efficiency, various tactics have been employed with considerable success to decouple intertwined material attributes. However, the integration of magnetism, derived from the unique spin characteristic that other methods cannot replicate, has been comparatively underexplored and presents an ongoing intellectual challenge. A previous research has shown that vacancy-filling Heuslers offer a highly adaptable framework for modulating thermoelectric properties. Here, it is demonstrated how intrinsic magnetic-electrical-thermal coupling can enhance the thermoelectric performance of vacancy-filling Heusler alloys. The materials, Nb0.75Ti0.25FeCrxSb with 0 ≤ x ≤ 0.1, feature a fraction of magnetic Cr ions that randomly occupy the vacancy sites of the Nb0.75Ti0.25FeSb half-Heusler matrix. These alloys achieve a remarkable thermoelectric figure of merit (zT) of 1.21 at 973 K, owing to increased Seebeck coefficient and decreased thermal conductivity. The mechanism is primarily due to the introduction of magnetism, which increases the density-of-states effective mass (reaching levels up to 15 times that of a free electron's mass) and simultaneously reduces the electronic thermal conductivity. Mass and strain-field fluctuations further reduce the lattice thermal conductivity. Even higher zT values can potentially be achieved by carefully balancing electron mobility and effective mass. This work underscores the substantial prospects for exploiting magnetic-electrical-thermal synergies in cutting-edge thermoelectric materials.
Collapse
Affiliation(s)
- Jiajun Chen
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Zirui Dong
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Qizhu Li
- Institutes of Physical Science and Information Technology, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Binghui Ge
- Institutes of Physical Science and Information Technology, Anhui University, 111 Jiulong Road, Hefei, 230601, China
| | - Jiye Zhang
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Yubo Zhang
- Minjiang Collaborative Center for Theoretical Physics, College of Physics and Electronic Information Engineering, Minjiang University, 200 Xiyuangong Road, Fuzhou, 350108, China
| | - Jun Luo
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
| |
Collapse
|
2
|
Xu L, Yin Z, Xiao Y, Zhao LD. Interstitials in Thermoelectrics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2406009. [PMID: 38814637 DOI: 10.1002/adma.202406009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/22/2024] [Indexed: 05/31/2024]
Abstract
Defect structure is pivotal in advancing thermoelectric performance with interstitials being widely recognized for their remarkable roles in optimizing both phonon and electron transport properties. Diverse interstitial atoms are identified in previous works according to their distinct roles and can be classified into rattling interstitial, decoupling interstitial, interlayer interstitial, dynamic interstitial, and liquid interstitial. Specifically, rattling interstitial can cause phonon resonance in cage compound to scatter phonon transport; decoupling interstitial can contribute to phonon blocking and electron transport due to their significantly different mean free paths; interlayer interstitial can facilitate out-of-layer electron transport in layered compounds; dynamic interstitial can tune temperature-dependent carrier density and optimize electrical transport properties at wide temperatures; liquid interstitial could improve the carrier mobility at homogeneous dispersion state. All of these interstitials have positive impact on thermoelectric performance by adjusting transport parameters. This perspective therefore intends to provide a thorough overview of advances in interstitial strategy and highlight their significance for optimizing thermoelectric parameters. Finally, the profound potential for extending interstitial strategy to various other thermoelectric systems is discussed and some future directions in thermoelectric material are also outlined.
Collapse
Affiliation(s)
- Liqing Xu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zhanxiang Yin
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yu Xiao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Li-Dong Zhao
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
- Tianmushan Laboratory, Yuhang District, Hangzhou, 311115, China
| |
Collapse
|
3
|
Lu X, Xie D, Zhu K, Wei S, Mo Z, Du C, Liang L, Chen G, Liu Z. Swift Assembly of Adaptive Thermocell Arrays for Device-Level Healable and Energy-Autonomous Motion Sensors. NANO-MICRO LETTERS 2023; 15:196. [PMID: 37566154 PMCID: PMC10421839 DOI: 10.1007/s40820-023-01170-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/08/2023] [Indexed: 08/12/2023]
Abstract
The evolution of wearable technology has prompted the need for adaptive, self-healable, and energy-autonomous energy devices. This study innovatively addresses this challenge by introducing an MXene-boosted hydrogel electrolyte, which expedites the assembly process of flexible thermocell (TEC) arrays and thus circumvents the complicated fabrication of typical wearable electronics. Our findings underscore the hydrogel electrolyte's superior thermoelectrochemical performance under substantial deformations and repeated self-healing cycles. The resulting hydrogel-based TEC yields a maximum power output of 1032.1 nW under the ΔT of 20 K when being stretched to 500% for 1000 cycles, corresponding to 80% of its initial state; meanwhile, it sustains 1179.1 nW under the ΔT of 20 K even after 60 cut-healing cycles, approximately 92% of its initial state. The as-assembled TEC array exhibits device-level self-healing capability and high adaptability to human body. It is readily applied for touch-based encrypted communication where distinct voltage signals can be converted into alphabet letters; it is also employed as a self-powered sensor to in-situ monitor a variety of body motions for complex human actions. The swift assembly approach, combined with the versatile functionality of the TEC device, paves the way for future advancements in wearable electronics targeting at fitness monitoring and human-machine interfaces.
Collapse
Affiliation(s)
- Xin Lu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Daibin Xie
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Kaihua Zhu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Shouhao Wei
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Ziwei Mo
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Chunyu Du
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Lirong Liang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China
| | - Guangming Chen
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China.
| | - Zhuoxin Liu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, People's Republic of China.
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
| |
Collapse
|
4
|
Jiang B, Wang W, Liu S, Wang Y, Wang C, Chen Y, Xie L, Huang M, He J. High figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics. Science 2022; 377:208-213. [DOI: 10.1126/science.abq5815] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The high-entropy concept provides extended, optimized space of a composition, resulting in unusual transport phenomena and excellent thermoelectric performance. By tuning electron and phonon localization, we enhanced the figure-of-merit value to 2.7 at 750 kelvin in germanium telluride–based high-entropy materials and realized a high experimental conversion efficiency of 13.3% at a temperature difference of 506 kelvin with the fabricated segmented module. By increasing the entropy, the increased crystal symmetry delocalized the distribution of electrons in the distorted rhombohedral structure, resulting in band convergence and improved electrical properties. By contrast, the localized phonons from the entropy-induced disorder dampened the propagation of transverse phonons, which was the origin of the increased anharmonicity and largely depressed lattice thermal conductivity. We provide a paradigm for tuning electron and phonon localization by entropy manipulation, but we have also demonstrated a route for improving the performance of high-entropy thermoelectric materials.
Collapse
Affiliation(s)
- Binbin Jiang
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Wu Wang
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shixuan Liu
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yan Wang
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chaofan Wang
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yani Chen
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lin Xie
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Mingyuan Huang
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiaqing He
- Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China
| |
Collapse
|