碲化铋热电材料性能优化及在船舶余热回收领域的应用-中国材料进展

文章信息/Info

Title:: Performance Optimization of Bismuth Telluride Thermoelectric Materials and Its Application in Waste Heat Recovery of Ships

作者:: 杨立泽1; 周云1; 张德2; 周小元2; （1. 上海海事大学海洋科学与工程学院，上海 201306）（2. 重庆大学物理学院，重庆 401331）

Author(s):: YANG Lize1; ZHOU Yun1; ZHANG De2; ZHOU Xiaoyuan2; （1.College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China) （2.College of Physics, Chongqing University, Chongqing 401331, China）

Keywords:: Bi2Te3; thermoelectric properties; nanosized; doping; temperature difference power generation

摘要:: 碲化铋(Bi2Te3)热电材料是能将热能与电能直接进行转换的功能材料，广泛应用于固态制冷、废热回收、空间发电等领域。目前本领域内的研究热点集中在如何提高Bi2Te3热电材料的能量转换效率上。在简述近年来Bi2Te3基热电材料研究进展的基础上，重点介绍了纳米化改性、掺杂改性的方法对Bi2Te3热电性能的优化，并分析其影响机制，结果表明，纳米结构化和掺杂均能较大程度提高Bi2Te3的热电性能。进一步采用Bi2Te3基热电器件，设计模拟了船舶柴油发电机烟气余热回收利用系统，并通过搭建测试平台研究该装置的发电效率，为船舶温差发电装置的发展提供实验基础。最后对Bi2Te3热电材料的发展趋势进行了展望。

Abstract:: Bismuth telluride (Bi2Te3) thermoelectric material is a functional material which can directly convert thermal energy and electric energy. It is widely used in solid state refrigeration, waste heat recovery and space power generation. At present, the research focuses in this field is how to improve the energy conversion efficiency of Bi2Te3 thermoelectric materials. In this paper, the research progress of Bi2Te3 based thermoelectric materials in recent years is briefly described, and the optimization of the thermoelectric properties of Bi2Te3 by nano-modification and doping modification methods is introduced, and the influencing mechanism is analyzed. The results show that the nano-structure and doping can improve the thermoelectric properties of Bi2Te3 to a large extent. Using Bi2Te3 based thermoelectric device, the flue gas waste heat recovery and utilization system of marine electric diesel engine is designed and simulated, and the power generation efficiency of the device is studied by building a test platform, which provides an experimental basis for the development of marine thermoelectric device. Finally, the development trend of Bi2Te3 thermoelectric material is prospected.