首页|Energy harvesting from human body heat using highly flexible thermoelectric generator based on Bi2Te3 particles and polymer composite
Energy harvesting from human body heat using highly flexible thermoelectric generator based on Bi2Te3 particles and polymer composite
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NSTL
? 2022 Elsevier B.V.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.
Bi2Te3Energy harvestingFlexible thermoelectric generatorThermoelectricThermoelectric film
Na Y.、Kim S.、Mallem S.P.R.、Yi S.、Park K.-I.、Kim K.T.
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School of Materials Science and Engineering Kyungpook National University
Powder Materials Division Korea Institute of Materials Science
NSTL
