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Energy devices generating and storing electricity from finger and solar thermal energy

Authors
Yang, SeunggenCho, KyoungahKim, Sangsig
Issue Date
3월-2020
Publisher
ELSEVIER
Keywords
Thermoelectric generator; Interdigitated micro supercapacitor; Environmental thermal energy; Solar heat absorption material
Citation
NANO ENERGY, v.69
Indexed
SCIE
SCOPUS
Journal Title
NANO ENERGY
Volume
69
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/57533
DOI
10.1016/j.nanoen.2020.104458
ISSN
2211-2855
Abstract
In this study, we demonstrate an energy device that consists of a thermoelectric generator (TEG) and a micro supercapacitor (MSC); electricity generated by the TEG is directly stored in the MSC. In this energy device, an interdigitated MSC is directly linked to a ring-patterned TEG with 80 pn modules that consist of p-Ag2Te and n-Ag2Se thin films. The ring-patterned TEG is designed for the effective use of thermal energy; a circular metal pad is added in its central area to maximize the absorption of thermal energy from a finger and from solar heat. The voltage of the MSC is rapidly raised up to 169 mV at a temperature difference of 8.6 K for the ring-patterned TEG; a volumetric energy density of 1.1 mJ/cm(3) and a power density of 89.5 mW/cm(3) are exhibited. In addition, our ring-patterned energy device generates and stores a voltage of 100 mV from the thermal energy of a finger with a raising rate of 0.1 V/min. Moreover, we examine the feasibility of the energy device consisting of a metal pad coated with solar-heat-absorption material when sunlight is used as the thermal energy source.
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공과대학 (전기전자공학부)
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