Energy harvesting from human body heat using highly flexible thermoelectric generator based on Bi2Te3 particles and polymer composite

被引：2
作者：
Na Y. [1 ]
Kim S. [1 ]
Mallem S.P.R. [1 ]
Yi S. [1 ]
Kim K.T. [2 ]
Park K.-I. [1 ]
机构：
[1] School of Materials Science and Engineering, Kyungpook National University, Daegu
[2] Powder Materials Division, Korea Institute of Materials Science, Gyeongnam, Changwon
来源：
Journal of Alloys and Compounds | 2022年 / 924卷
基金：
新加坡国家研究基金会;
关键词：
Bi[!sub]2[!/sub]Te[!sub]3[!/sub; Energy harvesting; Flexible thermoelectric generator; Thermoelectric; Thermoelectric film;
D O I：
10.1016/j.jallcom.2022.166575
中图分类号：
学科分类号：
摘要：
Energy harvesting technology is in high demand for self-powered devices. Flexible thermoelectric generators (f-TEGs) have attracted considerable attention for application in wearable electronics, which can be applied to healthcare and smart clothing. However, previous f-TEGs still have limitations such lack of novel research focus concerning its wearable applications and complicated and high-cost fabrication procedures. This study reports an f-TEG comprising Bi2Te3-based thermoelectric composite films on a flexible substrate to demonstrate thermoelectric energy conversion from the human body. To verify the thermoelectric energy harvesting efficiency of the energy harvester based on temperature gradients, an f-TEG was developed by placing p-type Bi0.5Sb1.5Te3 (BST) of 133 μWm−1K−2 and n-type Bi2Te2.7Se0.3 (BTS) of 124 μWm−1K−2 thermoelectric films. The fabricated f-TEG harvested an output voltage of 18.13 mV, current signal of 2.74 μA, and output power of ≈ 12.6 nW at ΔT = 25 K. The theoretical thermoelectric potential distribution of the f-TEG was confirmed by finite element analysis using multiphysics simulation. Furthermore, we investigated the biological output performance of the f-TEG on the human body, which showed the output performance of ≈ 0.38 μA and ≈ 2.3 mV. This study presents the possibility of harvesting thermal energy from human body heat, which will be useful for improving wearable device applications. © 2022 Elsevier B.V.
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