A laterally designed all-in-one energy device using a thermoelectric generator-coupled micro supercapacitor

Kyungwhan Yang, Kyoungah Cho, Seunggen Yang, Yoonbeom Park, Sangsig Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)667-672
Number of pages6
JournalNano Energy
Volume60
DOIs
Publication statusPublished - 2019 Jun 1

Keywords

  • Micro supercapacitor
  • Seebeck effect
  • Thermoelectric charging
  • Thermoelectric generator

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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