Enhanced Seebeck coefficients of thermocells by heat-induced deposition of I3-/hydrophobized α-cyclodextrin complexes on electrodes

Hirotaka Inoue, Yimin Liang, Teppei Yamada, Nobuo Kimizuka

Research output: Contribution to journalArticle

Abstract

Ethylated α-cyclodextrin (Et18-α-CD) is used as a host matrix for I-/I3- thermocells. Although Et18-α-CD is not soluble in water at ambient temperature, it becomes soluble by complexation of the I3- anion. Meanwhile, the complex is precipitated upon elevating the temperature. The change in thermo-responsive solubility of the I3-/Et18-α-CD complex increases the Seebeck coefficient (Se) of the thermocell up to 2.6 mV K-1. The underlying mechanism of the increased Se is elucidated by UV-vis spectroscopy, Raman spectroscopy, and electrochemical measurements. This result shows the temperature-dependent solubility changes of redox-active species as a potential means to improve the performance of electrochemical thermocells. This journal is

Original languageEnglish
Pages (from-to)7013-7016
Number of pages4
JournalChemical Communications
Volume56
Issue number51
DOIs
Publication statusPublished - Jun 28 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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