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Lee S, Park GM, Kim Y, Lee SH, Jung SJ, Hong J, Kim SC, Won SO, Lee AS, Chung YJ, Kim JY, Kim H, Baek SH, Kim JS, Park TJ, Kim SK. Unlocking the Potential of Porous Bi 2Te 3-Based Thermoelectrics Using Precise Interface Engineering through Atomic Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17683-17691. [PMID: 38531014 DOI: 10.1021/acsami.4c01946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Porous thermoelectric materials offer exciting prospects for improving the thermoelectric performance by significantly reducing the thermal conductivity. Nevertheless, porous structures are affected by issues, including restricted enhancements in performance attributed to decreased electronic conductivity and degraded mechanical strength. This study introduces an innovative strategy for overcoming these challenges using porous Bi0.4Sb1.6Te3 (BST) by combining porous structuring and interface engineering via atomic layer deposition (ALD). Porous BST powder was produced by selectively dissolving KCl in a milled mixture of BST and KCl; the interfaces were engineered by coating ZnO films through ALD. This novel architecture remarkably reduced the thermal conductivity owing to the presence of several nanopores and ZnO/BST heterointerfaces, promoting efficient phonon scattering. Additionally, the ZnO coating mitigated the high resistivity associated with the porous structure, resulting in an improved power factor. Consequently, the ZnO-coated porous BST demonstrated a remarkable enhancement in thermoelectric efficiency, with a maximum zT of approximately 1.53 in the temperature range of 333-353 K, and a zT of 1.44 at 298 K. Furthermore, this approach plays a significant role in enhancing the mechanical strength, effectively mitigating a critical limitation of porous structures. These findings open new avenues for the development of advanced porous thermoelectric materials and highlight their potential for precise interface engineering through the ALD.
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Affiliation(s)
- Seunghyeok Lee
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, South Korea
| | - Gwang Min Park
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, South Korea
| | - Younghoon Kim
- Graduate School of Materials and Devices, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea
| | - So-Hyeon Lee
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea
| | - Sung-Jin Jung
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Junpyo Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-Mobility, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Sung-Chul Kim
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Sung Ok Won
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Albert S Lee
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-Mobility, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Yoon Jang Chung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, South Korea
| | - Ju-Young Kim
- Graduate School of Materials and Devices, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea
| | - Heesuk Kim
- Soft Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Seung-Hyub Baek
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Jin-Sang Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Wanju 55324, South Korea
| | - Tae Joo Park
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, South Korea
| | - Seong Keun Kim
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, South Korea
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Lee S, Jung SJ, Park GM, Na MY, Kim KC, Hong J, Lee AS, Baek SH, Kim H, Park TJ, Kim JS, Kim SK. Selective Dissolution-Derived Nanoporous Design of Impurity-Free Bi 2 Te 3 Alloys with High Thermoelectric Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205202. [PMID: 36634999 DOI: 10.1002/smll.202205202] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Thermoelectric technology, which has been receiving attention as a sustainable energy source, has limited applications because of its relatively low conversion efficiency. To broaden their application scope, thermoelectric materials require a high dimensionless figure of merit (ZT). Porous structuring of a thermoelectric material is a promising approach to enhance ZT by reducing its thermal conductivity. However, nanopores do not form in thermoelectric materials in a straightforward manner; impurities are also likely to be present in thermoelectric materials. Here, a simple but effective way to synthesize impurity-free nanoporous Bi0.4 Sb1.6 Te3 via the use of nanoporous raw powder, which is scalably formed by the selective dissolution of KCl after collision between Bi0.4 Sb1.6 Te3 and KCl powders, is proposed. This approach creates abundant nanopores, which effectively scatter phonons, thereby reducing the lattice thermal conductivity by 33% from 0.55 to 0.37 W m-1 K-1 . Benefitting from the optimized porous structure, porous Bi0.4 Sb1.6 Te3 achieves a high ZT of 1.41 in the temperature range of 333-373 K, and an excellent average ZT of 1.34 over a wide temperature range of 298-473 K. This study provides a facile and scalable method for developing high thermoelectric performance Bi2 Te3 -based alloys that can be further applied to other thermoelectric materials.
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Affiliation(s)
- Seunghyeok Lee
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Sung-Jin Jung
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
| | - Gwang Min Park
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
| | - Min Young Na
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Kwang-Chon Kim
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
| | - Junpyo Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-mobility, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Albert S Lee
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
- Convergence Research Center for Solutions to Electromagnetic Interference in Future-mobility, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Seung-Hyub Baek
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
- Yonsei-KIST Convergence Research Institute, Seoul, 02792, South Korea
- Nanomaterials Science & Engineering, KIST School, Korea University of Science and Technology, Seoul, 02792, South Korea
| | - Heesuk Kim
- Soft Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul, 02792, South Korea
| | - Tae Joo Park
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Jin-Sang Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Wanju, 55324, South Korea
| | - Seong Keun Kim
- Electronic Materials Research Center, Korea Institute of Science and Technology Seoul, Seoul, 02792, South Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea
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