A laterally designed all-in-one energy device using a thermoelectric generator-coupled micro supercapacitor. (June 2019)

• Record Type: Journal Article
• Authors: Yang, Kyungwhan; Cho, Kyoungah; Yang, Seunggen; Park, Yoonbeom; Kim, Sangsig
• Is Part Of: Nano energy. Volume 60(2019)
• Page Start: 667
• Page End: 672
• Publication Date: 2019-06
• Subjects: Micro supercapacitor -- Thermoelectric generator -- Seebeck effect -- Thermoelectric charging; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2019.04.016
• Languages: English
• ISSNs: 2211-2855

Abstract

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 -Ag2 Te and n -Ag2 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. Graphical abstract: Image 1 Highlights: Energy device consists of a thermoelectric generator and a micro supercapacitor. The energy device generates a Seebeck voltage and charges it using thermal energy. A Seebeck voltage of 82 mV is generated and charged with a high efficiency of 98%. The energy device exhibits a high volumetric energy density of 697 μJ cm −3 .