材料科学
热电效应
能量密度
光电子学
变化(天文学)
热的
可扩展性
能量(信号处理)
工程物理
热电材料
复合材料
热导率
计算机科学
物理
热力学
量子力学
数据库
天体物理学
作者
Junfeng Huang,Rohan B. Ambade,Jacob Lombardo,B.W. Brooks,Aswani Poosapati,Priyanshu Banerjee,Mortaza Saeidi‐Javash,Yanliang Zhang,Deepa Madan
标识
DOI:10.1016/j.apmt.2024.102116
摘要
Additive manufacturing has been investigated as a more time, energy, and cost-efficient method for fabricating thermoelectric generators (TEGs) compared to traditional manufacturing techniques. Early results have been promising but are held back by including a high-temperature, long-duration curing process to produce high-performance thermoelectric (TE) films. This work investigates the synergistic effect of four factors – a small amount of chitosan binder (0.05wt%), a combination of micron and nano-sized particles, the application of mechanical pressure (20 MPa), and thickness variation (170, 240, 300 µm) – on the performance of stencil printed p-Bi0.5Sb1.5Te3 (p-BST) and n-Bi2Te2.7Se0.3 (n-BTS) TE composite films. The combination of these four factors controls the micro and nanostructure of the films to decouple their electrical and thermal conductivity effectively. This resulted in figures of merit (ZTs) of 0.89 and 0.5 for p-BST and n-BTS thinner (170 µm) films, respectively, comparable to other additive manufacturing methods despite eliminating the high-temperature, long-duration curing process. The process was also used to fabricate a 6-couple TEG device, which could generate 357.6 µW with a power density of 5.0 mW/cm2 at a ∆T of 40 K. The device demonstrated air stability and flexibility for 1000 cycles of bending. Finally, the device was integrated with a voltage step-up converter to power an LED and charge and discharge capacitor at a ∆T of 17 K, demonstrating its applicability as a self-sufficient power source.
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