| Author Name | Affiliation | | Asfandiyar | Institute of Materials Genome & Big Data, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China | | Sichen Duan | Institute of Materials Genome & Big Data, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China | | Jun Mao | Institute of Materials Genome & Big Data, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China | | Qian Zhang | Institute of Materials Genome & Big Data, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: |
| One of the abundantly available energies that could be found in industrial power plants, running vehicles, nuclear power stations, etc. is known as thermal energy. A physical phenomenon known as thermoelectricity converts thermal energy into electrical energy and vice versa, providing a green route for power generation and a potential solution to the world energy crisis. The thermoelectric conversion efficiency is generally characterized by the temperature-dependent dimensionless figure of merit (zT), which is generally promoted by increasing the power factor and reducing the thermal conductivity. The present work reviews heat transmission in thermoelectric materials, particularly phonon engineering to reduce the lattice thermal conductivity. The two leading strategies of point defects engineering and nanostructuring for reducing thermal conductivity have been summarized. The optimized reported zTs of various thermoelectric materials in terms of reduced thermal conductivity have been presented. |
| Key words: phonon transport engineering defects nanostructuring thermal conductivity zT thermoelectrics |
| DOI：10.11916/j.issn.1005-9113.2022058 |
| Clc Number:0472+.7 |
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| Descriptions in Chinese: |
| 综述：热电材料的声子工程 Asfandiyar1,端思晨1,毛俊1, 2,张倩1, 2 （1.哈尔滨工业大学（深圳） 材料科学与工程学院 材料基因与大数据研究院，深圳 518055； 2.哈尔滨工业大学 先进焊接与连接国家重点实验室，哈尔滨 150001） 中文说明：丰富的热能广泛存在于发电厂、汽车尾气和核电站中。热电转换技术作为一种环境友好型的新能源技术，可以实现热能和电能的直接转换，从而通过收集废热产生电量。热电器件的转化效率通常由与温度相关的热电优值（zT）来衡量，通过提升功率因子和降低热导率可以实现热电优值的有效提升。本综述总结了热电材料中的热输运问题，主要是利用声子工程降低材料的晶格热导率。通过总结点缺陷工程和纳米结构对降低晶格热导率的影响，本文讨论了利用降低晶格热导率来提高不同材料的热电优值。 关键词：声子传输，缺陷工程，纳米结构，热导率，热电优值，热电 |
