用于低品位余热能量收集的 Cu2Se/Ag2(S,Se) 基整体式热电发电机的开发,ACS Applied Materials & Interfaces

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用于低品位余热能量收集的 Cu2Se/Ag2(S,Se) 基整体式热电发电机的开发
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-09-28 , DOI: 10.1021/acsami.3c09823
Artoni Kevin R Ang _{1,

2} , Itsuki Yamazaki ₁ , Keisuke Hirata ₁ , Saurabh Singh _{1,

3} , Masaharu Matsunami _{1,

2,

3} , Tsunehiro Takeuchi _{1,

2,

3}

Affiliation

随着持续的气候和能源危机，热电转换已慢慢成为小型物联网（IoT）设备的清洁可靠的替代能源。市售热电发电机（TEG）通常由昂贵且有毒的Bi ₂ Te ₃基热电材料组成，并且需要复杂且能量密集的装置组装工艺。作为替代解决方案，我们开发了一种基于银和铜硫族化物的整体式 TEG，采用简单、快速且低能耗的设备制造工艺，用于低品位废热回收以进行能量收集。我们使用延性Ag ₂ S _0.55 Se _0.45和超化学计量Cu _2.075 Se，两者在室温下都具有优异的传输性能，在300 K时zT值为∼0.5。通过优化器件制造工艺，我们成功地组装了整体式器件TEG 没有任何明显的银离子或铜离子迁移，并获得了致密且坚固的装置。器件结构的策略优化能够降低器件的接触电阻，从而提高功率输出。在ΔT =30K时获得了0.68mW/cm ^{2的最大功率密度，这与类似的基于Bi}₂ Te ₃的单片TEG相当。_{这些结果表明，基于硫族化物的整体式 TEG 作为能量收集应用中基于 Bi 2} Te ₃的 TEG的简单且低成本替代品的潜力。

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Development of Cu2Se/Ag2(S,Se)-Based Monolithic Thermoelectric Generators for Low-Grade Waste Heat Energy Harvesting

With the ongoing climate and energy crises, thermoelectric conversion has slowly emerged as a clean and reliable alternative energy source for small Internet of Things (IoT) devices. Commercially available thermoelectric generators (TEGs) are typically composed of expensive and toxic Bi₂Te₃-based thermoelectric materials and require complicated and energy-intensive device assembly processes. As an alternative solution, we have developed a Ag- and Cu-chalcogenide-based monolithic TEG using simple, quick, and low-energy-cost device fabrication processes for low-grade waste heat recovery for energy harvesting. We used ductile Ag₂S_0.55Se_0.45 and overstoichiometric Cu_2.075Se, both possessing excellent transport properties around room temperature, with a zT value of ∼0.5 at 300 K. By optimizing the device fabrication process, we were successfully able to assemble the monolithic TEGs without any significant Ag- or Cu-ion migration and obtained a dense and robust device. Strategic optimization of the device structure was able to reduce the electrical contact resistance of the device, which resulted in increased power output. A maximum power density of 0.68 mW/cm² at a ΔT = 30 K was obtained, which is comparable to a similar Bi₂Te₃-based monolithic TEG. These results show the potential of chalcogenide-based monolithic TEG as a simple and low-cost alternative to Bi₂Te₃-based TEGs for energy harvesting applications.

更新日期：2023-09-28

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