Abstract
As an all-in-one energy device, we propose a thermoelectric generator-coupled micro supercapacitor (TEG-MSC) consisting of a planar micro supercapacitor linked directly to the thermoelectric pn modules of p-Ag 2 Te and n-Ag 2 Se nanoparticle thin films. In the TEG-MSC, a Seebeck voltage of 82 mV is generated at a temperature difference of 15.8 K and is rapidly charged with an efficiency of 98%. Additionally, the proposed device achieves a discharging and charging ratio of 99%. The small size and thinness of the TEG-MSC results in a high volumetric energy density of 697 μJ cm −3 . These excellent performance results stem from the lowering of ionic conductivity via heat treatment. In contrast to other ionic supercapacitors, the Soret effect is eliminated in the TEG-MSC. This shortens the charging time and significantly increases the ratio of discharging and charging.
Original language | English |
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Pages (from-to) | 667-672 |
Number of pages | 6 |
Journal | Nano Energy |
Volume | 60 |
DOIs | |
Publication status | Published - 2019 Jun |
Bibliographical note
Funding Information:This work was supported in part by the Mid-career Researcher Program (No. NRF-2016R1E1A1A02920171 ), Technology Development Program to Solve Climate Change ( NRF-2017M1A2A2087323 ), and Brain Korea 21 Plus Project in 2019 through the National Research Foundation of Korea funded by the Korea government (MSIT) ; and a Korea University Grant.
Publisher Copyright:
© 2019 Elsevier Ltd
Keywords
- Micro supercapacitor
- Seebeck effect
- Thermoelectric charging
- Thermoelectric generator
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science
- Electrical and Electronic Engineering