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首页> 外文期刊>Energy Conversion & Management >Key issues in development of thermoelectric power generators: High figure-of-merit materials and their highly conducting interfaces with metallic interconnects
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Key issues in development of thermoelectric power generators: High figure-of-merit materials and their highly conducting interfaces with metallic interconnects

机译：热电发电机开发中的关键问题：高品质的材料及其与金属互连的高导电界面

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Thermoelectric generators (TEGs) are devices that convert temperature differences into electrical energy, which work on the thermoelectric phenomena known as Seebeck effect. The thermoelectric phenomena have widely been used for heating and cooling applications, however electric power generation has only been limited to niche applications e.g. thermoelectric power generators for space missions. TEG provides one of cleanest energy conversion method, which is noise-free, virtually maintenance free and can continuously produces power for several years under ambient conditions. In recent years, energy generation through thermoelectric harvesting has witnessed an increased interest for various applications, including tapping waste heat from the exhaust of vehicles, from industries, etc. The development of an efficient TEG requires the fulfillment of several factors, which includes availability of n- and p-type thermoelectric materials with high figure-of-merit (ZT), preparation of ohmic contacts between thermoelements and metallic interconnects and management of maximum heat transfer though the device. In this review, we present an overview on the various aspects of device development i.e. from synthesis of high ZT thermoelectric materials to issues & design aspects of the TEG. A discussion on the various strategies employed to improve ZT is described. It is shown that a ZT of >2 has widely been reported in literature, which has been achieved either by enhancing the power factor and/or reducing the thermal conductivity of the materials. A discussion on the status on the development of TEGs suitable for operation at different temperature ranges i.e. <250 degrees C, 250-650 degrees C and >650 degrees C is presented. Finally, the cost of fabrication of TEGs and their potential applications in different areas have been highlighted. (C) 2016 Elsevier Ltd. All rights reserved.
机译：热电发电机（TEG）是将温差转换为电能的设备，可处理被称为塞贝克效应的热电现象。热电现象已被广泛地用于加热和冷却应用，然而，发电仅限于利基应​​用，例如热电联产。用于太空任务的热电发电机。 TEG提供了一种最清洁的能量转换方法，该方法无噪音，几乎无需维护，并且可以在环境条件下连续发电几年。近年来，通过热电收集产生的能量已经引起了人们对各种应用的兴趣，其中包括从汽车尾气，工业等中获取余热。有效的TEG的发展需要满足多个因素，其中包括具有高品质因数（ZT）的n型和p型热电材料，热电偶与金属互连之间的欧姆接触的制备以及通过器件的最大热传递管理。在这篇综述中，我们对设备开发的各个方面进行了概述，即从高ZT热电材料的合成到TEG的问题和设计方面。描述了用于改善ZT的各种策略的讨论。已经表明，ZT> 2在文献中已被广泛报道，这可以通过提高功率因数和/或降低材料的导热率来实现。讨论了适合在不同温度范围（即<250摄氏度，250-650摄氏度和> 650摄氏度）下运行的TEG的开发现状。最后，突出了制造TEG的成本及其在不同领域的潜在应用。 （C）2016 Elsevier Ltd.保留所有权利。

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